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Author Topic: Beep precisely every 10 sec on 40m  (Read 834 times)
W9IQ
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Posts: 853




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« Reply #15 on: January 12, 2017, 08:51:27 AM »

Norm,

Well that is very unusual. It would seem to indicate that the offending signal is very low in frequency but rich in harmonics that reach across the 40 Meter band. It sounds like you are listening to this in CW mode. At what frequency spacing does the same tone frequency repeat (in other words, how often does the harmonic repeat)? How long does the "beep" last?

- Glenn W9IQ
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- Glenn W9IQ

I never make a mistake. I thought I did once but I was wrong.
KC1BMD
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Posts: 414




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« Reply #16 on: January 12, 2017, 09:59:05 AM »

I hear it operating in SSB mode. I'll check CW but I don't remember it in that mode. I have not been able to determine spacing of any tone repetition (and checking for that will depend on band conditions). It could be there is no repeating (i.e. just a progression from low to high tone with extremes at both ends being inaudible). I'll  try to check further.
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N5RMS
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Posts: 51




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« Reply #17 on: January 12, 2017, 12:22:23 PM »

Nearby receiving scanner local oscillator!
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KC1BMD
Member

Posts: 414




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« Reply #18 on: January 13, 2017, 05:19:26 AM »

What type of scanner for example and how "nearby" are you suggesting? Is that just a "WAG" or do you know for certain it can cause the symptom? All my neighbors are seniors, most retired and I doubt they have such devices but who knows?
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