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Hello Squirrel Boy (cute Avatar!)
Thanks for your advice.
I am awaiting delivery of the 2x CRT testers kindly loaned by German friend Eckhard (see pictures).
The CPU auto-regen programme of the Müter 107 does not advise filament pre-heating as this can mess up the CPU-Controlled regen sequence (true emision).
Manual filament increase voltages: i've tried it in the past months, it works for demos but after several day's rest (7-10 days) the zero Red emission condition comes back, so this is not a time-durable solution.
RACS rebuilt with success a 15GP22 CRT, totally destroyed for years (spiders in the neck) with a broken/separated gun/neck assembly which was displayed at the ETF Convention 2010 working A-OK with flying colors. 6 months later, the CRT is still A-OK (no leaks) and producing great pictures.
If i send mine to them, they are my best chance to rebuild with success a nearly 60 year old color CRT.
Best Regards
jhalphen
Paris/France
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