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(Aaron Kentucky) wrote in message . com...
Thanks for the responses!

Here is some more info after doing some tests. All the low-voltages
check out (I don't have a hv meter.) When I disconnect the power
jumper to the vertical output amp the trace shows with horizontal
scan. This rules out a faulty crt.

no, it doesn't rule out a defective CRT: It'S still possible you have
a problem with the vert. plates because of the "jingle" you mentioned.
May be something internal is broken.
Just a "could be" , no "must".

Since I have an identical board I swapped it out with the other and
the same thing happens. Furthermore, I discovered that when the top
connector to the vertical deflection plates is disconnected the trace
also shows. This connector is sitting at +54 while the other is at
+16 which seesm to be in violation, but again this happens on both
boards. The delay line into the board is at +225mv and -204mv.

Thanks,
aaron

Looks like you have a problem in the preamp section and or
interconection.

i'd recommend you get a SERVICE Manual for this scope.
That's fairly easy: Just google for "bama" , there is a 465b excellent
scan for download in bama.sbc.edu in the Tektronix section(well, don't
nail me for the exact URL, just a result " of brain scanned")

hth,
Andreas