On Mon, Oct 21, 2024 at 12:01?AM Evan Hand via <elhandjr=[email protected]> wrote:
On Sun, Oct 20, 2024, at 04:27 PM, Lawrence Galea wrote:
If on a particulat band or bands using the same TX LPF then the respective LPF relay is suspect.
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If on all bands it could be the transmit/receive relay K3
K3 switches the LPFs out of the receive path, so it is unlikely that any of the LPF circuits are the issue.??
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As Scotty R. suggested, I would look for a possible heat issue.? This could be in any receiver circuit, including the BiDi amps.? It could also be related to the Si5351 drifting, causing an out-of-alignment issue.
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It would help to know if the background noise reduces when the fading occurs.? That could point to the LM386 or Q70 as the most likely culprits.
