Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z

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13dka
Posts: 139
Joined: Sat May 28, 2022 4:27 am
Location: On or near a dike

Re: Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z

Post by 13dka »

DXerPaulAK2024 wrote: Wed Aug 02, 2023 2:48 am Doubt a relay or airtime broker or pirate would fire up square on 10mhz.
Certainly not intentionally!
DXerPaulAK2024 wrote: Wed Aug 02, 2023 2:48 am If not overload, a mixing product.

Weird thigns happen when bombarded with strong signals or a peice of your gear failing.
Well I'm pretty familiar with these failure modes. "Mixing" and "intermodulation" are pretty synonymous, the former is used for the intentional and the latter for the unintentional effect creating the intermodulation products (aka "images"), usually due to overloading. There was no strong signal within the frontend bandpass (the 'OVL' indicater would have come on), hence there was no overloading and the radio is a direct-sampling receiver, meaning it does not have an IF to create these images either.

But anyway, I checked my records and I happen to have recorded the output of the KiwiSDR, which was not 30km up north but 120km SW in the inland:



This was recorded few minutes after I shot the video, off a very different radio 120km away, with an obviously much weaker signal. I don't think there is any better way to prove that this did not happen in my radio, which I used to check WWV at that early hour fairly often and got to know pretty well by now. But I obviously anticipated this discussion, that's why I recorded the RF gain reduction (which would have killed any internal distortion on this particular radio) and recorded the KiwiSDR.
DXerPaulAK2024 wrote: Wed Aug 02, 2023 2:48 am I've heard one of the "nordic norths" few remaining AM's.. NRK P1 on 1485!
1kW from ~4,300km away, that's pretty awesome! My "best kilowatt" so far was 1650 KCNZ in Cedar Falls, IA (6,700km)
DXerPaulAK2024
Posts: 12
Joined: Tue Aug 01, 2023 9:18 pm

Re: Oddity on WWV's 10MHz frequency June 30, 2022 05:10Z

Post by DXerPaulAK2024 »

13dka wrote: Wed Aug 02, 2023 4:41 am
DXerPaulAK2024 wrote: Wed Aug 02, 2023 2:48 am Doubt a relay or airtime broker or pirate would fire up square on 10mhz.
DXerPaulAK2024 wrote: Wed Aug 02, 2023 2:48 am I've heard one of the "nordic norths" few remaining AM's.. NRK P1 on 1485!
1kW from ~4,300km away, that's pretty awesome! My "best kilowatt" so far was 1650 KCNZ in Cedar Falls, IA (6,700km)
My best 1KW or less on SW is WMR 15700 and LRa36
Paul Walker, Program Director, Morning/Lunch Show Host, Engineer, Cleaner, Secretary, Assistant Promotions Person, snow Shoveler, Moose Shooer Awayer & Treato Giver To ALL Village Doggos
KSKO 89.5 McGrath, AK
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