To finish this thread the problem ended up being leakage from the CRT filament winding in the LV transformer.
Seems I didn't "hear" Alberts description of the problem until I got an email from Ferrous Steinka and the light went on.
I removed the CRT leads from the LV transformer and all the voltages from the HV transformer came on and stayed on.
I connected a spare transformer I had to the CRT leads and now have an excellent display on the CRT.
I was able to find a NOS 6.3V transformer with 3KV isolation? for $5? that should fit on the bottom of the scope cabinet.
And another TEK scope joins the "herd"
Thanks to everyone who shared their ideas on fixing the problem
ChuckA
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www.myvintagetv.com
