DXER ham radio news
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DXER ham radio news
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DXER ham radio news
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DXER ham radio news
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DXER ham radio news
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Southgate ARC - Software Defined Radio is fundamentally a different way of looking at radio spectrum We think of radio as operating on a specific frequency. We select an antenna resonant on a single band. We configure the radio for that same band and then turn the dial or the VFO, or Variable Frequency Oscillator to a particular frequency within that band
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May 05, 2019 at 07:24AM
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Southgate ARC - Jerry Lewine, K6QU, began his career in radio as a young ham in 1959, that led to a career as a broadcast engineer, first as a teenager in his native Pennsylvania, through the Air Force, and later to markets in Hawaii and California
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May 05, 2019 at 07:24AM
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(Source: Spaceweather via Troy Riedel)
This weekend, old sunspot AR2738 is returning from a two-week trip around the farside of the sun. After re-appearing late yesterday, the sunspot quickly produced two CMEs (coronal mass ejections), signalling that it may be even more active than before. Last month when it crossed the face of the sun, AR2738 crackled with low-level flares and strafed Earth with loud shortwave radio bursts.[…]
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May 05, 2019 at 07:24AM
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Many thanks to SWLing Post contributor, Alex, who notes updates to his excellent frequency charts. Alex writes:
My charts are updated again. This time I have changed format and made the charts less time consuming to compile and – I think – more user friendly too.
The result is they are updated for the summer schedule much earlier – there are still 6 months of summer to go for them to be useful!
For each hour, the listener is given a running order of about 30 stations that are most worthwhile to try. Doing it this way means you can easily compare the reception quality of the different frequencies for the same station and also get an idea of each broadcaster’s strategy for reaching listeners.
For the summer, I have put the top station as number 51, down to about 80. Many radios have enough storage to allow you to set a page for each hour and then up to 100 presets for each page. This means you can check your favourite stations in a couple of minutes. There is less detail, but today time is so precious, the ease of use seemed to me to be the priority for the charts. (I have numbered 1 to 30 for the winter charts)
Thank you for once again updating and sharing your handy broadcast charts, Alex!
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May 05, 2019 at 09:29AM
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Many thanks to SWLing Post contributor, Pete Eaton, who shares the following vintage industry short film:
Like Pete, I’m impressed with the size of those soldering irons!
Do you enjoy the SWLing Post?
Your support makes articles like this one possible. Thank you!
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May 05, 2019 at 09:29AM
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Today’s blog is a repost from August, 2015.
I see that the ARRL has filed three more formal complaints to the FCC concerning the bone-crushing HF emissions being produced by off-the-shelf grow light ballasts. The complaint also includes detailed lab data collected on all three devices and it is not pretty. One wonders why it is necessary at all that the ARRL be the industry watchdog instead of the FCC … why aren’t they being more diligent in filtering out these products before they hit the market? If importers and dealers are simply bypassing regulations for the sake of a quick-buck, then heavy fines must be imposed until someone ‘gets the message’.
Some of the test products were ordered and purchased through Amazon and through Sears … the ARRL’s thorough report makes it obvious that rules are being ignored and amateurs are paying the price.
“The level of conducted emissions from [these devices] is so high that, as a practical matter, one RF ballast operated in a residential environment would create preclusive interference to Amateur radio HF communications throughout entire neighborhoods,” ARRL General Counsel Chris Imlay, W3KD, wrote in each complaint. The devices exceeded conducted emission limits under all test conditions, “sometimes by extreme margins, throughout most of the HF range …”
In a similar vein as its recent complaint about marketing of certain RF lighting devices by The Home Depot, the ARRL pointed out that there were no FCC labels on two of the devices mentioned nor any FCC compliance information “anywhere in the documentation, or in or on the box, or on the device itself,” in violation of FCC Part 18 rules.
The League asked the FCC to require removal of all such illegal “grow light” devices from retail sale and marketing and the recall of those devices already sold or available for retail sale, and it said the device importers should be subject to a forfeiture proceeding.
With the proliferation of both legal and illegal 'hydroponic’ operations, this kind of QRN is probably just the tip of the iceberg. It’s good to see the ARRL slowly pounding away at the rule-breakers on behalf of American amateurs.
I see these same devices being sold on E-Bay, where presumably, they could be purchased worldwide and installed anywhere. As well, several of the U.S. online dealers state “ We ship to Canada” … just great.
Hopefully Industry Canada and RAC are gearing-up for the fight.
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May 05, 2019 at 11:39AM
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