Quote:
Originally Posted by timmy
Ok here’s the kicker the voltages we’re pretty close after checking yet more resistors still finding not a thing wrong switching tubes checking hv pot 6bk4 cap off still lousy hv until I have a light above the chassis I turned off to make sure the heaters were all lit and what do I find but one of the HO tubes top glowing blue lucky I had a good used one put it in reg tube cap off and a massive hiss and lots of corona and I did plug in the yoke on the bench. These 2 tubes were brand new but yet one was bad so I’m sure it’s going to be ok now I’ll find out Monday when I get 2 6eh7 tubes for the IF again new but we’re bad.
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When you get NOS tubes beware that many came off a shops shelf
& may be damaged ESPECIALLY hoz outs & big audio outs.
Best to stick with RCA, GE, & Sylvania. Tubes from set mfrs like
Zenith Moto, Maggy etc are a safe bet, most are made by the big 3.
Lots to NOT by, Lyndal & IEC are two junker tube lines.
Well done, progress made !
Zeno
