[Lowfer] Puzzle at 74.563 kHz

[Graham]

David,

I have seen this too and as displayed on Argo looks identical and has 
the same behaviour.

I can't recall the frequency but I may have noted it at about double the 
frequency you note but I my recollection may be faulty. I haven't looked 
for it in some time figuring it was just some EMI/RFI from yet another 
consumer electronic device of some sort like a smart water meter, or 
smart hydro meter, or (fill in the blank).

With a bit of detective work I might be able to track down the source 
but it hasn't bubbled to the top of my "to do" list yet as it hasn't 
really been a bother.

Do post your findings if you do figure out what the source is.

cheers, Graham ve3gtc




On 13-09-29 12:39 AM, David L. Wilson wrote:
> I have noticed I have a carrier at 74.563 receivable all the time.  There
> are ocational bursts of several minutes of what appears to be modulation on
> it.  Anyone else see this?  The attached is a past of part of an Argo
> waterfall pasted into WSPR-X waterfall.  Ther receiver was tuned for 72.94
> kHz usb so 1623 Hz+72.940 kHz =75.563 kHz.
>
> --
> David L. Wilson
> dwilson314 at verizon.net
>
>