[Elecraft] [K3] RX audio distorted on FM

[Bob Cunnings]

Actually, no, not for FM. Just as you say, most FM receiver IF
circuits run the circuit gain at maximum. Also, a conventional FM
receiver IF contains one or more limiter stages. Quieting is not a
function of reduced IF gain - it is  a function of the limiter.
Quieting is observed as signal strength rises past the point where
limiting begins, and full quieting occurs at the point at which the
signal is strong enough to saturate the limiter so that no AM
component remains.

Bob NW8L


>When the incoming station is "full quieting"... it's signal is so
>strong that the IF gain is pushed down so much that the detected
>audio is "quiet".. i.e. no additional band noise.. just the clean
>audio to your speaker.  Same deal with FM broadcast receivers.