i think you have nailed at least part of it -- rf stage. i have
emailed you offline details. had a completely dead rf amp tube, ahead
of the IF stage. this apparently forced a pretty severe tuning
compensation that affected the bands (?). all tubes tested before
starting work, but this one croaked sometime during repairs. found
intermittent black speaker lead and fixed. was cutting out also. so
there's some of it. already better w/if and bfo align redone. will
see what gives after i finish all rf again... hopefully it will come
back into line on all bands. yes i go first to bama for all.
bookmarked on about 4 computers i have.
ab


Richard Knoppow wrote:
"ablebravo" wrote in message
ups.com...
thx richard. esp on how to test the coils. i will do

Long thread snipped...

If you need a handbook for the Tek 465-B there is one on
the BAMA site at:
http://bama.sbc.edu/tektroni.htm
And for Eico instruments at:
http://bama.sbc.edu/eico.htm

This is a very good site to bookmark.

The signal tracer is a wide band amplifier with a
detector on it. You can probe around in the circuit to find
out what is there. That and the scope are powerful tools for
analysing exactly this sort of problem. You can use the
scope with either a high impedance probe or a simple pick-up
loop to look at the oscillator output. The look will cause
the least disturbance to the circuit you are measuring.


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Richard Knoppow
Los Angeles, CA, USA