I have been doing some RFI hunting today, in order to find some of the noisy switch-mode power supplies in the appartment.
I found a rather noisy one (cheap "universal" laptop supply) with wideband "carriers" every 70 kHz and the noise level dropped considerably when that one was disconnected.
I have been considering replacing as many as possible of the switch-mode PS's with linear regulated ones, because it is far too noisy here, Maybe not worth it, since some neighbours probably have some noisy ones as well.
In any case I am enjoying the little bit more quiet environment here.
It is far from over yet, but a good beginning.
Sporadic-E opening reaches as high as 162 MHz in North America - 4th July
2025
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While it's not uncommon to read of reports of Sporadic-E openings on the
144 MHz (2m) amateur radio band, it's unusual to hear of reception reports
at hi...
13 hours ago
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