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Re: ICOM SSB and ADSP filter kit?
"Does the “noise’ affect the email?"
As the signal to noise ratio decreases (i.e. there's more noise) there will be more errors, more retries, slower throughput. So yes, noise will slow or stop all digital traffic including email.
If you'e got a strong signal and pesky but weaker local noise, decreasing the RF gain will decrease the strength of both the signal and noise, and if you can decrease it enough to lose the noise while keeping the signal, that's great. But if it just cuts back both, and the noise is strong...it just cuts them both back without helping. You just have to experiment.