DXER ham radio news
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 An erroneous report this week suggested that the FCC planned to again impose an Amateur Radio vanity call sign application (regulatory) fee of $70 for the 10-year term. This incorrect conclusion resulted from an incomplete reading of the May 7 FCC Notice of Proposed Rulemaking ( NPRM) in the matter of the assessment and collection of regulatory fees for fiscal year 2019.
Although the Schedule of Regulatory Fees does show a $7 annual fee for Amateur Radio vanity call signs, a boldface heading in that section of the NPRM states, “ REGULATORY FEES. This section is no longer is effect as it has been amended by RAY BAUM’S Act of 2018…” Section 9(e)(2) of RAY BAUM’S Act gives the Commission discretion to exempt a party from paying regulatory fees when the FCC determines that the cost of collection exceeds the amount collected. A new section 9(e)(1) incorporated the Amateur Radio vanity fee exemption from FCC rules into the statute.
The NPRM makes clear in several other places that regulatory fees no longer apply to Amateur Radio licenses. The FCC eliminated the regulatory fee for Amateur Radio vanity call signs in 2015.
Source: ARRL
April 16, 2015
Wire Antenna, Assembled, Multi-Band, Non-resonant, 150 W, UHF Male, PL-259, 80.3 ft. Length, Each Wire Antenna Band Wire Antenna Frequency 160 meters… Read more
October 15, 2018
40 Meter Dipole “I enjoyed putting these pieces together from MFJ Hy Gain, MFJ Cushcraft, Texas Towers, M2 and our local hardware store t… Read more
March 05, 2015
Vertical Loop Yagi See More : Link Read more
January 26, 2017
“After several attempts to build a multiband C-Pole I finally ended up with the Multiband H-Pole. C-Poles for different frequencies on one pole… Read more
June 06, 2017
Coax Line from Federico Romano, IW2MVI is a simple and fast app that allow you to calculate the loss of your coax line and calculate power output from… Read more
December 12, 2014
MacLoggerDX HD is an Amateur Radio application that monitors the spots from your favourite DX Cluster for DXing, Contesting or casual rag-chewing. It… Read more
November 09, 2015
In order to support the proliferation of third party app stores worldwide, we have now released RFinder on Android as trialware! Just go download it f… Read more
March 29, 2015
Once again RFinder and RT Systems have partnered to kick radio programming up a notch. This tutorial will show you how to get the most o… Read more
May 14, 2017
NEW! Quality microphones and accessories with affordable pricing for the active ham. Something for every shack! INRAD, a division of Vibroplex® LLC,… Read more
January 10, 2015
The “Big Gun” is getting even bigger, with the new DX-3SP! With over 4000 Watts CW and more then 4500 Watts SSB, this QRO muscle amp is… Read more
May 14, 2019
“Jarrad VK3BL reviews Palstar’s AT2KD and talks about the advantages of having a large, high powered tuner even if you only run barefoot…. Read more
May 13, 2019
George and Tommy from AmateurLogic review the IC-9100 with Ray Novak, N9JA from Icom. In this classic smackdown episode, the IC-9700 goes up against t… Read more
May 13, 2019
FTM-400XDR C4FM FDMA / FM 144/430 MHz DUAL BAND TRANSCEIVER The new FTM-400XDR includes an improved GPS receiver that employs the latest in GPS techno… Read more
May 10, 2019
Sherwood Report “ANNOUNCEMENT – Friday May 10th, 2019: Sherwood Report on the FTDX101D We know that some have been waiting for the Sherwoo… Read more
The post The FCC is Not Reinstating a Vanity Call Sign Fee appeared first on QRZ NOW - Amateur Radio News.
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May 17, 2019 at 07:41AM
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“AA3B PRESENTATION ON PROPAGATION TOOLS: Bud Trench AA3B was the featured speaker on May 10th at the Fair Lawn Senior Center. His topic: “Using Propagation Tools for Contesting and DXing.” Bud Trench has made over 1.2 million QSOs since first being licensed in 1970. He has a passion for contesting. He was a WRTC competitor for the first time in 2018 and is on the DXCC Honor Roll. He holds the current World Record score for CQ WW CW in the Low Power Category. He is a member of the Frankford Radio Club, First Class CW Operators’ Club, CW Ops, Activity Group CW – DL, CWJF, Pa QSO Party Administration and ARRL. Bud earned a BSEE degree and Masters of Engineering Science degree from the Pennsylvania State University and retired in 2016 after working for Lockheed Martin for over 38 years. He currently resides in Boyertown, PA where he has been building his contest station since 1987.”
May 16, 2019
Elecraft K4 OVERVIEW A direct-sampling SDR you’ll love to use Our new K4 harnesses the latest in signal processing while retaining the best aspects of… Read more
April 26, 2019
DX Engineering Universal Copper Grounding Clamps DXE-UCGC-Z DX Engineering Universal Copper Grounding Clamps are custom designed to provide a ground r… Read more
April 19, 2019
Plug and play USB recording microphone with 5.9-Foot USB Cable included for computer PC laptop that connects directly to USB port for record music,com… Read more
May 08, 2019
Why choose the 6BS-270 antenna versus a traditional Yagui? · Elements of full wavelength, reaching maximum efficiency in TX / RX. · Optimized design…. Read more
May 06, 2019
CHAMELEON ANTENNA EMCOMM-III Portable HF Antenna is specially designed for short to long range portable and man-pack HF communications. The EMCOMM III… Read more
April 19, 2019
Model Frequency (MHz) Gain (dBi) Length Feedline VT-14 144-148 2.6 36 in. 3 ft. RG-58 VT-22 222-225 2.6 25 in. 3 ft. RG-58 VT-44 440-450 2.6 16… Read more
April 09, 2019
The winning article for the April 2019 QST Cover Plaque award is “A High-Power 160- and 80-Meter Transmitting Loop Antenna” by Steve Adler, VK5SFA. Th… Read more
May 14, 2019
“Jarrad VK3BL reviews Palstar’s AT2KD and talks about the advantages of having a large, high powered tuner even if you only run barefoot…. Read more
May 13, 2019
George and Tommy from AmateurLogic review the IC-9100 with Ray Novak, N9JA from Icom. In this classic smackdown episode, the IC-9700 goes up against t… Read more
May 13, 2019
FTM-400XDR C4FM FDMA / FM 144/430 MHz DUAL BAND TRANSCEIVER The new FTM-400XDR includes an improved GPS receiver that employs the latest in GPS techno… Read more
May 10, 2019
Sherwood Report “ANNOUNCEMENT – Friday May 10th, 2019: Sherwood Report on the FTDX101D We know that some have been waiting for the Sherwoo… Read more
May 01, 2019
The FT4 Protocol for Digital Contesting by K1JT Read more
April 29, 2019
Source: LINK WSJTX 2.1.0RC5 Release! – The FT4 Protocol for Digital Contesting The FT4 Protocol for Digital Contesting by K1J… Read more
April 24, 2019
See More about New FT4 Here “At about 20 minutes into the presentation, Joe describes FT4 as being asynchronous, meaning that you can start tran… Read more
April 23, 2019
A new, speedier, more contest-friendly digital mode is just days away in beta version. WSJT-X Developers say serious work on the new FT4 protocol bega… Read more
The post Contesting & Propagation Tools, Bud Trench, AA3B, Presents – Part 1 appeared first on QRZ NOW - Amateur Radio News.
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May 17, 2019 at 07:41AM
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 A working prototype of OSCAR 1, Amateur Radio’s first satellite, will be on display at AMSAT’s Dayton Hamvention® booth. AMSAT’s exhibit will be in Building 1 (Maxim Hall) at the Greene County Fairgrounds and Expo Center in Xenia, Ohio. OSCAR 1 (Orbiting Satellite Carrying Amateur Radio) was launched into orbit in 1961, at the dawn of the Space Age. Built by a group of California-based radio amateurs for about $60, OSCAR 1 was the first nongovernmental satellite. It transmitted a simple “HI” in CW for nearly 20 days and was heard in 28 different countries. W1AW Station Manager Joe Carcia, NJ1Q, recently had to troubleshoot a problem with ARRL’s OSCAR 1 in preparation for its Dayton appearance in a special “OSCAR Park” display commemorating AMSAT’s 50th anniversary. He said it was a “rather humbling” experience.
“Apparently, OSCAR 1 was not transmitting properly,” Carcia said. “So, I took it back into the shop, changed the power cable, and checked the transmitter. I had to tweak it just a bit.” Carcia said the satellite now functions.
Only three OSCAR 1 satellites were made. One was launched into orbit, of course, while the Smithsonian Institution houses the other. “Assuming it doesn’t get bounced around too much en route, it will be transmitting a chirpy ‘HI’ on 145.224 MHz,” Carcia said. “The load is a 50 W resistor, so you can copy it about 50 feet or so away from the source.”
AMSAT will present Amateur Radio satellite operation demonstrations outside the main entrance of Maxim Hall, 8 AM – 4:30 PM, on all three days of Hamvention. “AMSAT will be demonstrating actual contacts with the operational amateur satellites,” AMSAT said in its weekly AMSAT News Service newsletter. “We especially want to invite youth to make a contact via an amateur satellite. All are invited to observe, participate and ask questions.”
AMSAT will hold its forum in Room 2 on Saturday, May 18, starting at 12:10 PM EDT. AMSAT Vice President of User Services Robert Bankston KE4AL, will moderate the session.
Source: ARRL
June 28, 2016
Adding topband to a full sized elevated 80m vertical and putting N6LF’s QEX data to the test This antenna started out as an 80m vertical… Read more
December 27, 2015
Long Range Wi-fi Dish Antenna THIS INEXPENSIVE WI-FI DISH ANTENNA OUTPERFORMS ALL OTHERS! Presented here is a project showing how to convert common sa… Read more
April 30, 2015
The Light Beam Multi-band Antenna has been developed for Hams who want one antenna which enables them to operate on multiple amateur bands. Bas… Read more
April 23, 2017
Paradan Radio Antenna Disconnect Reduce the chance of station equipment damage from lightning or static charges. The Antenna Disconnect automatically… Read more
February 15, 2017
Alinco DM-30 Digital Power Supplies are an affordable switching power supply that packs a lot of features including Anderson Powerpole® connectors. Th… Read more
November 10, 2015
SOTABEAMS has introduced a new product to their range of Powerpole DC products. The Fuser-6 is a fused DC distribution panel with one fused input and… Read more
December 20, 2016
The K42 is the Swiss Army knife of CW keyers, it will provide lots of CW operation and enjoyment. A CW keyboard interface, CW reader, iambic paddle ke… Read more
December 17, 2014
The 507 Patriot utilizes a chipKIT Uno32 prototyping board which give users access to an Arduino-based programming environment. With its 32-bit… Read more
May 11, 2018
Ailunce HD1 Dual Band DMR Digital DCDM TDMA Waterproof Two Way Radio Description: HD1 dual band digital radio uses Digital Mobile Radio (DMR) Tier 2 S… Read more
March 05, 2015
Get ready for action as you hear signals that you may never have heard before. The DJ-G7 tunes 0.530-1299.995MHz continuously, and you can enjo… Read more
August 29, 2015
Wouxun KG-879 Description of Features 1. DTMF encoding and decoding 2. 105 groups DCS / 50 groups CTCSS 3. Wide /narrow bandwidth 4. Selection 5. ANI… Read more
February 06, 2015
Description： The Baofeng BF-F9+TP is the upgraded version of BF-F9+ with the trip power 1w/4w/8W/. With its 128 channel capacity and up to 12 hours of… Read more
August 12, 2018
FlexRadio Systems announces the release of SmartSDR for iOS v2.6.2 is now available for download or update from the Apple App Store. This App requires… Read more
January 08, 2015
Ham Radio App DroidRTTY is an application to decode and encode Ham Radio RTTY with the build in microphone/speaker or wired to your radio. A wa… Read more
December 07, 2015
Radio Waves The modern world is awash in a sea of radio waves — currents of electromagnetic radiation upon which our digital lives depend. What if you… Read more
May 25, 2017
HamSphere 4.0 Mobile is a virtual portable Ham Radio transceiver for Shortwave, VHF and UHF bands. Talk with thousands of Ham Radio operators around t… Read more
The post First Ham Satellite — OSCAR 1 — will Join AMSAT’s 50th Anniversary Celebration at Dayton appeared first on QRZ NOW - Amateur Radio News.
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May 17, 2019 at 07:41AM
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Elecraft K4
OVERVIEW
A direct-sampling SDR you’ll love to use
Our new K4 harnesses the latest in signal processing while retaining the best aspects of the K3S and P3. The resulting user interface makes the technology transparent, allowing you to focus on working the world.
160-6 meter, all-mode coverage & dual RX
The K4 includes dual receive over 100 kHz to 54 MHz. Since it utilizes direct sampling, there’s no need for crystal filters in the K4 or K4D (see Models, back page). For extreme-signal environments, we offer a dual superhet module (standard in the K4HD). An internal VHF/UHF module is also planned.
High-resolution mini-pan for each receiver
Our advanced fine-tuning aid, with its resampled bandwidth as narrow as +/- 1 kHz, is displayed separately from the main panadapter. You can turn it on by tapping either receiver’s S-meter or by tapping on a signal of interest.
Simple operation and setup
The K4 features a large, full-color touch display, combined with a rich set of real controls. Per-VFO transmit metering makes split mode completely foolproof. Band-stacking switches and per-receiver controls are both intuitive and versatile, adapting to operating context. Usage information on these and other features is just one tap away, thanks to our built-in help system.
Rich I/O complement
The rear panel includes all the RF, analog and digital I/O you’ll need to complete your station. All K-line accessories are supported, including amps, ATUs, and our K-Pod station controller. The HDMI video output supports an external display with its own user-specified format.
Full remote control from multiple devices
The K4 can be 100% remote controlled, via Ethernet, from a second K4 as well as a PC, notebook, or tablet. Panadapter data is included on all remote displays.
Modular hybrid architecture
The K4 adapts to your needs, with three models to choose from:
- Basic K4 with wide-range dual receive
- K4D with diversity receive
- K4HD with a dual superhet module for exceptional dynamic range
You can upgrade or add options as desired, or as new technology becomes available. This extensibility applies to software as well. The K4’s powerful, fast-starting CPU provides unlimited expansion opportunities.
Fast signal processing
The RF signal chain in the K4 incorporates parallel hardware processing of data streams, including a dedicated DSP subsystem. This, combined with silent, PIN-diode T/R switching, ensures fast CW break-in. Data and speech-processing delays are also minimized.
Standard DSP features include easy-to-adjust, per-mode RX/TX EQ; clean, punchy RF speech processing; full DVR capabilities; and several built-in data decode/encode modes. Direct-sampling technology results in an ultra-flat passband response for clean RX and TX audio. Since the signal chain is software-defined, the DSP can be field upgraded to add new algorithms and operating modes.
KAT4 ATU
The KAT4 ATU has a nominally 10:1 matching range. It includes 3 antenna jacks, any one of which can be selected as an input for one or both receivers.
Internal VHF/UHF module (future option)
An expansion slot is reserved for a high-performance VHF/UHF module, with output of approximately 15 W. This module will support all modes.
Kit version
A no-soldering kit version of the K4 is planned for later release. Builders will learn about advanced radio technology as they proceed. All modules are pre-aligned and tested.
MODELS
The K4 adapts to your needs, with three models to choose from.
| Model K4 |
Model K4D |
Model K4HD |
| Basic K4 transceiver provides 160-6 m, all-mode coverage; 100 W output; five receive RF sources; and wideband dual watch, allowing the main and sub receivers to be set for the same or different bands. |
Adds KDIV4 option, with a second set of band-pass filters and additional direct-sampling ADC module. This allows the two receivers to use different antennas – a requirement for diversity receive. Having two sets of band-pass filters also optimizes signal handling when the receivers are on different bands and/or antennas.
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Includes all of the above, plus our dual superhet module, the KHDR4. Ideal for competitive field day, contesting, and DXpedition stations. Each superhet receive section includes two crystal filters: one SSB/data bandwidth, one CW bandwidth. The superhet’s 8 MHz IF has excellent dynamic range, so additional crystal filters are not required.
STANDARD FEATURES
Size: 4.5”H x 13.5”W, 10” D
Weight: Approx. 10 lbs
Supply Voltage: 12-15 VDC
Current: ~2 A RX, ~18-23 A TX
Frequency Range: 100 kHz – 54 MHz (VHF/UHF range to be determined*)
Stablility: +/- 0.25 ppm (TCXO)
Modes: CW, SSB, AM, FM, Data
LCD: 7” color; touch & mouse control
Text modes: CW, PSK31/63, RTTY
KAT4 ATU: 10:1+ range; 3 ant. jacks
RX antenna sources: Up to 5
A-to-D Converter(s): 16 bits
I/O: USB-A x3, USB-B (two virtual com ports + audio), RS232 (DE9), Ethernet, HDMI. front/rear mic, front/rear phones, LINE in/out, speakers, PTT in, KEY out, paddle, key, ACC,12 V out.
CW QSK: Silent, PIN-diode switched
Other: RX/TX EQ, real-time clock,100% remote control including panadapter data, remote antenna switch control*, custom in-box software apps*
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May 16, 2019
A working prototype of OSCAR 1, Amateur Radio’s first satellite, will be on display at AMSAT’s Dayton Hamvention® booth. AMSAT’s exhibit will be in Bu… Read more
May 16, 2019
An erroneous report this week suggested that the FCC planned to again impose an Amateur Radio vanity call sign application (regulatory) fee of $70 for… Read more
May 15, 2019
The Board of Directors of an antenna-restricted community in Arizona voted overwhelmingly in April to allow radio amateurs to erect certain outdoor an… Read more
May 14, 2019
This year’s second Kidsday will be held on Saturday 15th of June. This event is especially created to promote Amateur Radio to youth. This is a moment… Read more
May 01, 2019
The FT4 Protocol for Digital Contesting by K1JT Read more
April 29, 2019
Source: LINK WSJTX 2.1.0RC5 Release! – The FT4 Protocol for Digital Contesting The FT4 Protocol for Digital Contesting by K1J… Read more
April 24, 2019
See More about New FT4 Here “At about 20 minutes into the presentation, Joe describes FT4 as being asynchronous, meaning that you can start tran… Read more
April 23, 2019
A new, speedier, more contest-friendly digital mode is just days away in beta version. WSJT-X Developers say serious work on the new FT4 protocol bega… Read more
May 14, 2019
“Jarrad VK3BL reviews Palstar’s AT2KD and talks about the advantages of having a large, high powered tuner even if you only run barefoot…. Read more
May 13, 2019
George and Tommy from AmateurLogic review the IC-9100 with Ray Novak, N9JA from Icom. In this classic smackdown episode, the IC-9700 goes up against t… Read more
May 13, 2019
FTM-400XDR C4FM FDMA / FM 144/430 MHz DUAL BAND TRANSCEIVER The new FTM-400XDR includes an improved GPS receiver that employs the latest in GPS techno… Read more
May 10, 2019
Sherwood Report “ANNOUNCEMENT – Friday May 10th, 2019: Sherwood Report on the FTDX101D We know that some have been waiting for the Sherwoo… Read more
The post Elecraft K4 – High Performance Direct Sampling SDR appeared first on QRZ NOW - Amateur Radio News.
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May 17, 2019 at 07:41AM
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| courtesy: Roger, G3XBM |
For the past few years several amateurs in Europe and along the east coast of North America have been experimenting on the ‘ dreamers band’, 8.7 - 9.1 kHz.
Some rather surprising distances have been covered on these frequencies in spite of the dreadfully poor efficiencies realized with backyard antenna systems.
Previous ‘earth-mode’ backyard experiments on VLF by Roger, G3XBM, are well documented on his website along with details on his simple homebrew gear used to send signals across town using the earth. Following Roger’s steady progression via his previous blog spots makes for fascinating reading … there is some really great stuff here making it difficult to not jump in and take the plunge yourself.
This experimental field presents the ideal opportunity for a couple (or several) local amateurs to work together at exchanging signals on these low frequencies with simple home built equipment.
A major contributor to the present state of the ‘VLF / ULF amateur art’ is Stefan, DK7FC and a posting this week to the old RSGB’s (blacksheep) LF reflector makes some of his earlier work pale by comparison as he announced the reception of his 270Hz signal (the 1110km band!) at a distance of 177 km!
Just a note from a recent experiment at 270.1 Hz.
On Sunday morning, 2019-05-12_10:34,+150m, I’ve done a carrier transmission on my ground loop antenna again. I did not expect more than, hopefully, a detectable spectrum peak in 57.6 km distance, i.e. at my tree site. The tree receiver site was listening and recording data using vlf-rx tools.
One E field antenna and two orthogonal loops were listening. The loops have been improved recently! They consist out of a single circular turn of 1.2 m diameter using 10mm diameter copper tube (about 25 mm^2). It is a closed loop, non-resonated, with an impedance matching transformer. This transformer previously had 1:100 turns. Now it (they) has 2:240 turns, i.e. two turns primary (out of 14mm^2, AWG6). This improved the sensitivity below 2 kHz significantly ( abt. 4…5 dB).
Furthermore the TX antenna length and angle has been improved, resulting in about +3 dB more signal strength on the RX site!
In a previous experiment at 270.1 Hz, some month ago, there was no result at all, not the weakest trace, despite excessive tweaking of all parameters. So the question was, will the improvements result in a detectable signal now?
Several things went wrong in that experiment. I forgot a bag containing important equipment such as the power supply for the netbook that generates the carrier signal. Also the output power was not as high as planned, just about 380 W, giving 2.2 A antenna current (I measured 64.7 V at 1 A DC). Anyway i managed to improvise so the experiment was started, but with some hours of delay which meant i higher QRN background level. Then, on the WLAN link to the tree, there were several interruptions of the stream (i’ll move to 5 GHz very soon!). I even got some QRM from my battery charger for some short time periods (forgot to disable the charger remotely). So there were several factors that could have been improved or avoided. And the middle of May is not the ideal time anyway.
Well, 270.1 Hz, that’s the 1110 km band! The far field begins at 177 km distance, i.e. i am clearly in the near field here. Thus, from a 'magnetic’ TX antenna, we would expect that the signal is mainly detectable on the H field, i.e. the loop antennas.
The first interesting results is that this expectation is actually confirmed. There is nothing detectable on the E field but the carrier S/N in the H fields is close to 10 dB in the first run. Mixing the H fields and tweaking the filters rises the carrier S/N to 10.7 dB, see attachment.
So far not really an undoubtedly detection but it is a candidate for optimism! With a few less problems during the experiment there is a chance for 14 dB SNR. Also, there is quite much sideband QRM around 300 Hz which makes 270 Hz a bit harder to work on.
73, Stefan
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May 17, 2019 at 07:41AM
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Southgate ARC - SDR: How many colours inside a Software Defined Radio? If you were asked to make an image of the Sydney harbour bridge and only use four dots, the viewer might struggle to determine what was the bridge, the sky, the water and the Sydney Opera House
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RigPi MFJ-1234
“Our first look at the brand new RigPI Remote station server called the MFJ-1234. This little beauty allows you to connect and control almost any radio remotely with your iPhone, Android, iPad and PC/Laptop/Desktop. We go to talk with Howard the creator on Thursday before the start of HamVention 2019. GigaParts has an order now, ready to ship MFJ has units exclusively at Dayton Hamvention for this weekend.”
February 19, 2018
The EMCOMM III Base antenna, is an effective multi-band High Frequency (HF) antenna specially designed for short to long range base station HF communi… Read more
January 05, 2016
“ As with all ham stations QRO or QRP, ten percent ofa station?s success in quality QSOs is the equipment and the operator. Ninety percent is th… Read more
December 17, 2014
Get 160-6 Meters Coverage and 1500 Watt Operation with a single antenna! This MFJ-2990 is a 43-foot self-supporting vertical antenna that cover… Read more
December 28, 2014
The SARK-110 is a completely new design concept for an Antenna Analyzer. This is a truly pocket size device, so you can take it anywhere. It of… Read more
September 19, 2018
The RFpower LA1K5 is a solid-state 1200 watts 1.8 – 54MHz power amplifier. It uses a ruggedness 1800 watts 65 V LDMOS technology NXP’s MRF… Read more
February 24, 2016
decoder translates and displays the tones of a telegraph or teletype signal on a display of alphanumeric characters. Only required to run a connection… Read more
April 14, 2015
Zhong Xing Power Amplifier Since 2010 with advanced technologies and selected materials, we began to manufacture Zhong Xing Power Amplifiers fo… Read more
June 09, 2015
This pole is built very similar to our well proven 12m and 18m fiberglass poles, and carefully designed to maintain low weight and perfect bala… Read more
June 03, 2017
Brief introduction for Radioddity GD-55 Plus, A Practical DMR GD-55 Plus Differentiating Factors 10W High Power IP-67 Waterproofed Mototrbo Tie… Read more
May 21, 2015
EI3KD and EI4DQ both spotted our 2m beacon from qth locator IO51 for a distance of almost 4200 km. At 15.11 Z of May 20th,2015 rs… Read more
December 17, 2014
Small APRS Transceiver with MicroAPRS by DB1NTO Read full Article from DB1NTO : Read more
November 04, 2016
PD982, a new member of the already versatile DMR portfolio of Hytera, brings exceptional audio experience with enhanced features and innovation… Read more
May 16, 2019
A working prototype of OSCAR 1, Amateur Radio’s first satellite, will be on display at AMSAT’s Dayton Hamvention® booth. AMSAT’s exhibit will be in Bu… Read more
May 16, 2019
An erroneous report this week suggested that the FCC planned to again impose an Amateur Radio vanity call sign application (regulatory) fee of $70 for… Read more
May 15, 2019
The Board of Directors of an antenna-restricted community in Arizona voted overwhelmingly in April to allow radio amateurs to erect certain outdoor an… Read more
May 14, 2019
This year’s second Kidsday will be held on Saturday 15th of June. This event is especially created to promote Amateur Radio to youth. This is a moment… Read more
The post RigPi RigPi MFJ-1234 Station Server, Remote Ham Radio @Hamvention appeared first on QRZ NOW - Amateur Radio News.
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November 09, 2015
In order to support the proliferation of third party app stores worldwide, we have now released RFinder on Android as trialware! Just go download it f… Read more
March 13, 2018
EchoLink for iOS version 2.6.14 is now available in the App Store. This is a 64-bit build that is fully compatible with iOS 10 and modern iOS devices…. Read more
November 23, 2014
‘Satellite Explorer Pro’ is a tool for tracking satellites in real time. It is not a game. Be sure to visit the support web site http://ww… Read more
September 11, 2015
The QTH Locator App was developed for HAM Radio use. This is the extended version of “Maidenhead Grid Locator” using Google Maps to show a… Read more
March 21, 2017
Yaesu FT-70DR C4FM FDMA / FM 144/430 MHz DUAL BAND 5W Handheld Transceiver The FT-70DR is a compact System Fusion transceiver providing both conventio… Read more
June 13, 2015
HYS TC-MAUV11 Product Detail Basic Info Model NO.: TC-MAUV11 Type: Vehicle Mouted Function: Mobile Radio Place of Origin: Fujian, China (Mainland) Bra… Read more
January 02, 2016
Great news for digitally connect hams in the great Toronto area! Today, VA3XPR launches an all-digital repeater using Yaesu’s System Fusion C4FM FDMA… Read more
August 13, 2015
YANTON DM-980 Built for dual-mode (Digital+ Analog) 1000Channels Versatile Voice Call (Private call,group call, all call and emergency call) Digital e… Read more
May 01, 2019
The FT4 Protocol for Digital Contesting by K1JT Read more
April 29, 2019
Source: LINK WSJTX 2.1.0RC5 Release! – The FT4 Protocol for Digital Contesting The FT4 Protocol for Digital Contesting by K1J… Read more
April 24, 2019
See More about New FT4 Here “At about 20 minutes into the presentation, Joe describes FT4 as being asynchronous, meaning that you can start tran… Read more
April 23, 2019
A new, speedier, more contest-friendly digital mode is just days away in beta version. WSJT-X Developers say serious work on the new FT4 protocol bega… Read more
May 15, 2019
Yaesu FT-3DR Yaesu FT-3DR 5W C4FM/FM 144/430MHz Dual Band Digital Transceiver Reservation The new FT3DR provides reliable 5W RF power output in compac… Read more
May 15, 2019
Amateur Radio Roundtable and host Tom Medlin, W5KUB, will be back at Dayton Hamvention to livestream the activity and action before, during, and after… Read more
May 11, 2019
“A High Power 50 Watt GMRS Mobile Radio from BTECH is Released BTECH announced today the North American release of the BTECH GMRS-50X1. The GMRS… Read more
The post Introducing three new Yaesu FT3-DR – Hamvention appeared first on QRZ NOW - Amateur Radio News.
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Elecraft K4
STANDARD FEATURES
Size: 4.5”H x 13.5”W, 10” D
Weight: Approx. 10 lbs
Supply Voltage: 12-15 VDC
Current: ~2 A RX, ~18-23 A TX
Frequency Range: 100 kHz – 54 MHz (VHF/UHF range to be determined*)
Stablility: +/- 0.25 ppm (TCXO)
Modes: CW, SSB, AM, FM, Data
LCD: 7” color; touch & mouse control
Text modes: CW, PSK31/63, RTTY
KAT4 ATU: 10:1+ range; 3 ant. jacks
RX antenna sources: Up to 5
A-to-D Converter(s): 16 bits I/O: USB-A x3, USB-B (two virtual com ports + audio), RS232 (DE9), Ethernet, HDMI. front/rear mic, front/rear phones, LINE in/out, speakers, PTT in, KEY out, paddle, key, ACC,12 V out.
CW QSK: Silent, PIN-diode switched
Other: RX/TX EQ, real-time clock,100% remote control including panadapter data, remote antenna switch control*, custom in-box software apps*
A working prototype of OSCAR 1, Amateur Radio’s first satellite, will be on display at AMSAT’s Dayton Hamvention® booth. AMSAT’s exhibit will be in Building 1 (Maxim Hall) at the Greene County Fairgrounds and Expo Center in Xenia, Ohio. OSC… Read more
By Roy lV. Lewallen I’ve always been a bit bothered by balunst since I was never sure what they are supposed to dot let alone hotv they might go about doing it. The majority of articles deal with various ways o f building and… Read more
Elecraft K4 STANDARD FEATURES Size: 4.5”H x 13.5”W, 10” D Weight: Approx. 10 lbs Supply Voltage: 12-15 VDC Current: ~2 A RX, ~18-23 A TX Frequency Range: 100 kHz – 54 MHz (VHF/UHF range to be determined*) Stablility: +/- 0.25 p… Read more
The post Elecraft K4 – Price list! appeared first on QRZ NOW - Amateur Radio News.
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 “This weekend at Hamvention (Dayton, Ohio) Andy, Mike and Steve from SDRplay will be showing an early version of Diversity reception running in SDRuno with an RSPduo.
The RSPduo gives users the ability to implement receiver diversity as it contains two independent tuners that are phase and time synchronous. Depending upon the usage case and reception conditions, diversity can give substantial improvements in reception performance, particularly in a mobile multipath fading environment. There are many different types of diversity, but they all basically rely upon de-correlating the signal between two antennas. This de-correlation can be achieved through different polarisations or spatial separation.
It’s important to be aware, that the key to getting decent gains from diversity lies in having the correct antenna setup and if you get it wrong, you can actually make things worse! That said, in some circumstances,the improvements can also be dramatic.
Here’s a bit more about what’s going on. In a multipath fading environment, signal reflections can combine in anti-phase in a way that results in the signal being cancelled. This is called a deep fade. If we have two antennas that are separated by ¼ wavelength at the frequency of interest, the spatial separation can help ensure that whilst one antenna is in a deep fade, the other may not be. As a consequence, either by simply selecting the antenna with the best signal or by combining the two signals it is possible to make the receiver considerably more resilient to fading.
Similarly if you consider the same antenna setup but this time without multipath effects. You will end up with roughly the same level of signal power on each antenna. By adjusting the phase of one signal before combining the two paths, it is possible to ensure that the signals add in-phase and thus constructively giving a 6 dB increase in the signal power. However, the noise generated by each tuner is uncorrelated and so when the noise power is combined, the increase is only 3 dB. Therefore is it possible to see a net 3 dB improvement in the SNR as a result of combination of the two paths, which is equivalent to reducing the noise figure of a single receiver by 3 dB. If the amplitudes are not exactly equal , then as well as adjusting the phase, you would also adjust the amplitude of one path to ensure that they were equal before combination. This principle of trimming the gain and phase prior to combining the two paths to give the best possible SNR is called Maximum Ratio Combination (MRC) diversity.
It is important to understand that MRC diversity is not guaranteed to give better performance that what may be received from a signal antenna. For example, if one antenna is in a deep fade, combining the two signals will result in a degraded SNR when compared to simply selecting the antenna with the strongest signal. That is simply because, combining will not boost the signal power, but will boost the noise power. However, in a mobile multipath fading environment, MRC diversity will substantially improve receiver resilience to fading.
Under certain circumstances, the same principle can be used to cancel interference without substantially degrading the strength of the signal of interest. In this case the antenna positions are adjusted so that the interfering signal arrives at the two antennas with the same signal strength and in phase. If the signal of interest is arriving from a direction that is orthogonal to the source of interference, then the antennas will see the wanted signal of equal strength, but with a 90 degree phase shift. If the two paths are now subtracted (added with a 180 degree phase shift), then the interfering signal will cancel, but the de-correlated signal of interest will combine, thus resulting in a substantial improvement in the SNR.
One other useful application for such a setup is that given a known separation between two antennas, being able to measure the phase difference between the signal at each antenna, simple trigonometry allows for an estimation of the direction from which the signal has come. This approach is sometimes referred to as ‘time of arrival direction finding’. This technique will only work well with signals that are substantially free from multi-path.
The picture shown here shows the additional diversity controls which will be added to SDRuno.
We hope to release this diversity option for RSPduo owners in SDRuno release V1.32 due out in the coming weeks.”
May 01, 2019
The FT4 Protocol for Digital Contesting by K1JT Read more
April 29, 2019
Source: LINK WSJTX 2.1.0RC5 Release! – The FT4 Protocol for Digital Contesting The FT4 Protocol for Digital Contesting by K1J… Read more
April 24, 2019
See More about New FT4 Here “At about 20 minutes into the presentation, Joe describes FT4 as being asynchronous, meaning that you can start tran… Read more
April 23, 2019
A new, speedier, more contest-friendly digital mode is just days away in beta version. WSJT-X Developers say serious work on the new FT4 protocol bega… Read more
April 22, 2019
Joe Taylor, K1JT, Steve Franke, K9AN, and Bill Somerville, G4WJS April 22, 2019 Introduction: FT4 is an experimental digital mode designed specificall… Read more
May 17, 2019
RigPi MFJ-1234 “Our first look at the brand new RigPI Remote station server called the MFJ-1234. This little beauty allows you to connect and co… Read more
May 14, 2019
“Jarrad VK3BL reviews Palstar’s AT2KD and talks about the advantages of having a large, high powered tuner even if you only run barefoot…. Read more
May 13, 2019
George and Tommy from AmateurLogic review the IC-9100 with Ray Novak, N9JA from Icom. In this classic smackdown episode, the IC-9700 goes up against t… Read more
May 13, 2019
FTM-400XDR C4FM FDMA / FM 144/430 MHz DUAL BAND TRANSCEIVER The new FTM-400XDR includes an improved GPS receiver that employs the latest in GPS techno… Read more
May 10, 2019
Sherwood Report “ANNOUNCEMENT – Friday May 10th, 2019: Sherwood Report on the FTDX101D We know that some have been waiting for the Sherwoo… Read more
March 25, 2019
Apple has released a new app for digital QST (version 5.1) readers that use that platform. A long-standing problem involved the inability of some Appl… Read more
October 16, 2018
WSPR WSPR implements a protocol designed for probing potential propagation paths with low-power transmissions. Normal transmissions carry a station’s… Read more
August 19, 2018
Thomas Lindner, DL2RUM, is happy to announce the availability of version 3.5.2 of his RUMlogNG2Go logger for the iPhone and iPad. RUMlogNG2Go can be … Read more
August 12, 2018
FlexRadio Systems announces the release of SmartSDR for iOS v2.6.2 is now available for download or update from the Apple App Store. This App requires… Read more
May 17, 2019
Elecraft K4 STANDARD FEATURES Size: 4.5”H x 13.5”W, 10” D Weight: Approx. 10 lbs Supply Voltage: 12-15 VDC Current: ~2 A RX, ~18-23 A TX Frequenc… Read more
May 16, 2019
Elecraft K4 OVERVIEW A direct-sampling SDR you’ll love to use Our new K4 harnesses the latest in signal processing while retaining the best aspects of… Read more
April 26, 2019
DX Engineering Universal Copper Grounding Clamps DXE-UCGC-Z DX Engineering Universal Copper Grounding Clamps are custom designed to provide a ground r… Read more
April 19, 2019
Plug and play USB recording microphone with 5.9-Foot USB Cable included for computer PC laptop that connects directly to USB port for record music,com… Read more
The post SDRuno release V1.32 due out in the coming weeks appeared first on QRZ NOW - Amateur Radio News.
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ARRL -
The FCC Universal Licensing System ( ULS) online filing system currently is experiencing problems and is inaccessible. This includes application and license searches, as well as License Manager, Tower Construction Notification System, E-106 System, ASR Online Filing, ASR Application Search, ASR Registration Search, TOWAIR, and all ULS Specialized Searches). “We are actively researching the issu…
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The FCC Universal Licensing System ( ULS) online filing system currently is experiencing problems and is inaccessible. This includes application and license searches, as well as License Manager, Tower Construction Notification System, E-106 System, ASR Online Filing, ASR Application Search, ASR Registration Search, TOWAIR, and all ULS Specialized Searches). “We are actively researching the issu…
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The International Amateur Radio Union ( IARU) member-societies on May 3 completed voting to ratify the nominations of IARU President Tim Ellam, VE6SH/G4HUA, and Vice President Ole Garpestad, LA2RR, to new terms. With 57 affirmative votes required for ratification, Ellam received 75 votes, and Garpestad received 74 votes.
Applications for IARU membership have been received via IARU Region 1 from t…
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ARRL -
Adafruit Industries Founder Limor Fried, AC2SN, was one of two 2019 Women in Open Source Award winners. Sponsored by open-source solution provider Red Hat, the awards honor women who make important contributions to open-source projects and communities, or those making innovative use of open-source methodology.
Nominations for this year’s awards were accepted for two categories: “Academic” for th…
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ARRL -
The International Amateur Radio Union ( IARU) member-societies on May 3 completed voting to ratify the nominations of IARU President Tim Ellam, VE6SH/G4HUA, and Vice President Ole Garpestad, LA2RR, to new terms. With 57 affirmative votes required for ratification, Ellam received 75 votes, and Garpestad received 74 votes.
Applications for IARU membership have been received via IARU Region 1 from t…
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Adafruit Industries Founder Limor Fried, AC2SN, was one of two 2019 Women in Open Source Award winners. Sponsored by open-source solution provider Red Hat, the awards honor women who make important contributions to open-source projects and communities, or those making innovative use of open-source methodology.
Nominations for this year’s awards were accepted for two categories: “Academic” for th…
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ARRL -
Just days ahead of the 2019 Hurricane Season, dozens of hams along the US East Coast will demonstrate Amateur Radio’s ability to deliver messages without commercial power, infrastructure, or permanently established stations for officials of the American Red Cross and the Federal Emergency Management Agency (FEMA).
The Thursday, May 23 event will take place in coordination with ARRL, during a joi…
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Just days ahead of the 2019 Hurricane Season, dozens of hams along the US East Coast will demonstrate Amateur Radio’s ability to deliver messages without commercial power, infrastructure, or permanently established stations for officials of the American Red Cross and the Federal Emergency Management Agency (FEMA).
The Thursday, May 23 event will take place in coordination with ARRL, during a joi…
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In an interest to keep up with the latest Amateur Radio news, here are some more photos of the K4, courtesy of the “The SWLing Post” blog:
I believe when all is said and done, you’ll be looking at a minimum of around $4000.00 (US).
I guess that’s what you pay for the newest, best and brightest top-of-the-line rig from a top-of-the-line company. As for me and my household, I don’t think so. I’m quite happy with my KX3 and besides, I have two kids in college.
What I am interested in, though, is that Jeff Davis KE9V stated that Hans Summers from QRP Labs said that the QSX radio should be on the market in a few months. A new QRP kit that I can build for under $200? Now that’s something I can sink my teeth into!
72 de Larry W2LJ
QRP - When you care to send the very least!
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 Just days ahead of the 2019 Hurricane Season, dozens of hams along the US East Coast will demonstrate Amateur Radio’s ability to deliver messages without commercial power, infrastructure, or permanently established stations for officials of the American Red Cross and the Federal Emergency Management Agency (FEMA).
The Thursday, May 23 event will take place in coordination with ARRL, during a joint meeting with Red Cross and FEMA officials in Baltimore. The demonstration will be a mock response to a simulated disaster scenario — a major hurricane with mass casualties striking the east coast. Amateur Radio operators at portable stations from New England to the Carolinas will deliver messages to W1AW, which will then coordinate and deliver the information to officials attending the joint FEMA-Red Cross meeting in Baltimore.
Messaging will be handled using digital modes, which can allow for the transmission of images as well as text, as a showcase for the full range of modern Amateur Radio technology. The American Red Cross will also have a NexGen Emergency Response Vehicle parked at W1AW in Connecticut as part of the training exercise, which will take place from 1330 to 1530 UTC.
ARRL and its members have a long history of working with emergency response agencies, such as the American Red Cross and FEMA, to provide or support communication in times of disaster for served agencies and partners. A principal served agency, the Red Cross shelters, feeds, and provides emotional support to victims of disasters.
Source: ARRL
March 20, 2015
The TEN-TEC RX 340 is a multi mode, general coverage synthesized receiver utilizing extensive Digital Signal Processing. DSP brings the perform… Read more
September 09, 2017
IC-R30 Communications Receiver (Handheld) The IC-R30 is the successor to the popular IC-R20 compact handheld receiver. The IC-R30 can listen to two si… Read more
May 17, 2019
Elecraft K4 STANDARD FEATURES Size: 4.5”H x 13.5”W, 10” D Weight: Approx. 10 lbs Supply Voltage: 12-15 VDC Current: ~2 A RX, ~18-23 A TX Frequenc… Read more
September 06, 2018
“General 3D shared with me an ingenious solution. It’s a small plastic stand that he designed that custom fits the base of any Baofeng UV-5R bod… Read more
March 13, 2016
Description Liquid Rubber Feed Point Sealant 30ml bottle with brush-in-lid Applicator We have formulated an excellent UV resistant rubber sealant to e… Read more
August 02, 2018
“Antenna Rotators” is the topic of the new (August 2) episode of the “ARRL The Doctor is In” podcast. Listen…and learn! Sponsored by DX Engine… Read more
March 07, 2015
“After reading many antenna articles in the Internet and a couple ARRL antenna books I got interested in physically small HF antennas. My… Read more
November 03, 2015
Buddipole vs AlexLoop Walkham “Tried to do the most objective analysis on a comparison between the Buddipole and a AlexLoop Walkham ante… Read more
May 01, 2019
The FT4 Protocol for Digital Contesting by K1JT Read more
April 29, 2019
Source: LINK WSJTX 2.1.0RC5 Release! – The FT4 Protocol for Digital Contesting The FT4 Protocol for Digital Contesting by K1J… Read more
April 24, 2019
See More about New FT4 Here “At about 20 minutes into the presentation, Joe describes FT4 as being asynchronous, meaning that you can start tran… Read more
April 23, 2019
A new, speedier, more contest-friendly digital mode is just days away in beta version. WSJT-X Developers say serious work on the new FT4 protocol bega… Read more
May 17, 2019
Elecraft K4 STANDARD FEATURES Size: 4.5”H x 13.5”W, 10” D Weight: Approx. 10 lbs Supply Voltage: 12-15 VDC Current: ~2 A RX, ~18-23 A TX Frequenc… Read more
May 16, 2019
Elecraft K4 OVERVIEW A direct-sampling SDR you’ll love to use Our new K4 harnesses the latest in signal processing while retaining the best aspects of… Read more
April 26, 2019
DX Engineering Universal Copper Grounding Clamps DXE-UCGC-Z DX Engineering Universal Copper Grounding Clamps are custom designed to provide a ground r… Read more
The post Radio Amateurs to Demonstrate Emergency Messaging Capabilities for Red Cross, FEMA appeared first on QRZ NOW - Amateur Radio News.
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— DX Engineering (@DXEngineering) May 17, 2019
May 01, 2019
The FT4 Protocol for Digital Contesting by K1JT Read more
April 29, 2019
Source: LINK WSJTX 2.1.0RC5 Release! – The FT4 Protocol for Digital Contesting The FT4 Protocol for Digital Contesting by K1J… Read more
April 24, 2019
See More about New FT4 Here “At about 20 minutes into the presentation, Joe describes FT4 as being asynchronous, meaning that you can start tran… Read more
May 17, 2019
RigPi MFJ-1234 “Our first look at the brand new RigPI Remote station server called the MFJ-1234. This little beauty allows you to connect and co… Read more
May 14, 2019
“Jarrad VK3BL reviews Palstar’s AT2KD and talks about the advantages of having a large, high powered tuner even if you only run barefoot…. Read more
May 13, 2019
George and Tommy from AmateurLogic review the IC-9100 with Ray Novak, N9JA from Icom. In this classic smackdown episode, the IC-9700 goes up against t… Read more
January 19, 2015
Wouxun KG-UV9D Experience Multi-Band excitement with the Wouxun KG-UV9D! This multi-modulation two way radio combines dual band transmission, 7 band r… Read more
January 25, 2015
Icom IC-DPR100-vehicle type digital simple radio of easy-to-use high output 5W only registration process. Advanced operability, new IC-DPR100 with onb… Read more
May 06, 2015
VHF Marine Radios CHICAGO, IL (May 6, 2015) — Cobra Electronics Corporation, the leading designer and marketer of award-winning marine, safety,… Read more
November 03, 2018
HEXTENNA 9+ BAND HEXTENNA  FULL-SIZE HF+2M/220/440MHZ Pre-Orders will ship in December and are now being accepted. Price is exclusive for pre-orders on… Read more
November 03, 2015
Buddipole vs AlexLoop Walkham “Tried to do the most objective analysis on a comparison between the Buddipole and a AlexLoop Walkham ante… Read more
December 14, 2014
AH-521, is a halo antenna of small size but high performance. Supports an RF level between 140 and 210 W. Covers bands used between 12 and 30 M… Read more
February 09, 2017
Photo:K5TRA EchoLink for iOS version 2.2 is now available in the App Store. This is a 64-bit build that is fully compatible with iOS 10 and modern iOS… Read more
June 06, 2017
Coax Line from Federico Romano, IW2MVI is a simple and fast app that allow you to calculate the loss of your coax line and calculate power output from… Read more
April 27, 2016
RFinder now includes the ability to make jamming reports. This is already available in RFinder Android and should be available on iOS devices by Dayto… Read more
November 15, 2014
Description Please note: This app is for licensed Amateur Radio operators only. See www.echolink.org for more information. EchoLink for iOS provides a… Read more
September 12, 2016
Features The RK-3xx series of switches uses vacuum relays. It is designed to switch coaxial lines in RF systems operating up to 5 kW continuous… Read more
The post DX Engineering RT4500HD Heavy Duty Rotator appeared first on QRZ NOW - Amateur Radio News.
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During the period 17 to 20 May, 2019 a team consisting Anatoly R6AW, Oleg R7LP, Gennady R3BY, Maxim RU5D and Yuri RX6CM, with the support of the Russian Robinson Club, plan activity as R3RRC/6 (and with personal callsigns) from Lebyazh’i Islands, Black Sea Coast group, IOTA EU-180, RRA RR 24-08 (NEW ONE) and Lebyazh’i Islands Reserve […]
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Elecraft has added some “eye candy” to Dayton the Elecraft K4! My email inbox has gone from an average daily count of about 25 emails to a new high of 80 to 100! The Elecraft reflector being the new leader for my inbox. I’m not going to get into the specifics as that has been all over the internet and blogs. It’s nice to see Elecraft enter this new phase in their product line…..am I going to rush out and purchase a K4…….nope. I am happy with my Elecraft KX3 and the Icom7610. For those of you out there who were considering an Elecraft rig now may be the time as I assume there are going to be those who are selling their K3 or K3S to get cash for a nice new shiny Elecraft K4.
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ARRL -
The first day of Dayton Hamvention 2019 began with prompt crowds streaming in as soon as doors opened. ARRL Expo was one area that drew fair attention, with the addition of a booth for the new ARRL and Dayton Hamvention Mobile Event App. Available for free download, the app provides maps of the entire fairgrounds, booth layouts in every building, schedules of forums and presentations, and other…
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May 18, 2019 at 12:41AM
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The first day of Dayton Hamvention 2019 began with prompt crowds streaming in as soon as doors opened. ARRL Expo was one area that drew fair attention, with the addition of a booth for the new ARRL and Dayton Hamvention Mobile Event App. Available for free download, the app provides maps of the entire fairgrounds, booth layouts in every building, schedules of forums and presentations, and other…
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May 18, 2019 at 12:41AM
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Southgate ARC - NXP is hosting an RF power amplifier design contest. Applicants will record a video or create an article describing their power amplifier/demo using NXP’s new 50 V, 100 W MRF101AN or 300 W MRF300AN RF power LDMOS transistor
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Southgate ARC - CQ magazine has announced the induction of one individual and one group to the CQ DX Hall of Fame, which honors those DXers who not only excel in personal performance but who also “give back” to the hobby in outstanding ways
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