[Drake] TR-7 Receiver Noise Question

[Jim DiMauro]

Hi All:

My TR-7 exhibits a low level background noise that sounds similar to random
atmospheric static.  The noise comes from inside the radio.  It's audible
when a dummy load is connected, the RF gain is turned down and there's no
external noise to mask it.  It's most noticeable (to the point of being
extremely annoying) when using the 500 Hz CW filter; it's also present when
using the other filters, but it's almost inaudible and isn't a problem with
other modes.  It's independent of the audio gain control, so that's a clue
as to where to start looking for the noise source.  Before I dig in, has
anyone heard of this before?

Thanx & 73,
Jim
WA2MER