[TenTec] Carrier sliding across bands
wb2vuf at verizon.net
Fri Nov 9 16:47:11 EST 2018
An ionosonde, I think, would be a clean signal. I get switching power
supplies sweeping across the bands in my neighborhood, but they drift
very slowly and usually have a rough AC modulation on them. The buzz is
often found across the band at 20-30 kHz intervals. Noise blankers
won't wake them out. I hate 'em!
On 10/24/2018 12:22 PM, MadScientist wrote:
> Ionosonde sounds like the most plausible source. I read the description and it looks very much like what I am hearing.
>> On Oct 24, 2018, at 11:16 AM, Mike Bryce <prosolar at sssnet.com> wrote:
>> that could well be nothing more than a switching power supply (think wall wart here) and that’ s the oscillator singing away.
>> if you can, run the 7300 on a battery and pull the main breaker in the house. If the carrier goes away, start looking
>> if it’s still there, as your neighbors about pulling wall warts one at a time (good luck with that!)
>> Mike, WB8VGE
>>> On Oct 24, 2018, at 12:07 PM, MadScientist <dukeshifi at comcast.net> wrote:
>>> Well, I entered the SDR world with my new IC-7300! That’s off topic but what I have observed with it is very much on topic.
>>> Over the past year I have heard, on all rigs, a carrier sweeping across the band (all bands). It is fairy strong.
>>> The landscape ,on the 7300 is fast enough to observe the nature of this. The signal consists of actually three peaks that typically start on the low end of a given band and sweep the range of 200 KHz in about 2 seconds, with the speed being nearly constant, as evidenced by the sloping line that the signal makes on the waterfall display.
>>> That line is almost perfectly monotonic across the entire scope window.
>>> In addition, I sometimes see a carrier that makes a back-hand-forth movement on the waterfall display.
>>> Does anyone have any idea what be the origin of this signal??
>>> I know it’s not a radio artifact as I have herd this on a dozen different radios. Also, if I disconnect the antenna, this is never heard.
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>>> TenTec at contesting.com
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