[TenTec] Carrier sliding across bands

[Bwana Bob]

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!

73,

Bob WB2VUF

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.
>
> Thanks!
>
> Gary
>
>> 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
>> www.theheathkitshop.com
>>
>>
>>
>>> 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.
>>>
>>> Gary
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