It is impossible to guess at what can be wrong. There are many components
involved to receive, and process the signal. An experienced tech who is
knowledgeable in servicing tuners should be able to troubleshoot the tuner
for you, and find the failed components.

--

JANA
_____


"mc" wrote in message
news FM stereo receiver, vintage 1973, has a noticeable background hoise
(hiss/white noise) on FM stereo regardless of the incoming signal level. It
disappears completely upon switching to mono.

Is this normal in a receiver of that age? If not, what components are
likely to be deteriorating?