Thread: Rca 9-t-79
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Old 12-01-2019, 08:16 PM
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MadMan MadMan is offline
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I put the whole shebang on my workbench and brought it up on a variac. I got filaments but nothing else. I tested power in and out of the 5U4. Power in, nothing out. It tested poorly on my Hickok earlier. I pulled it out and the getter flash looks light gray instead of normal, which I'm pretty sure it looked normal before. Either this tube went to air slowly or maybe it was cooked. Which makes sense, because after I changed it, the set pulled 300 watts, I heard the HV try to come on a couple times, and two of the three big can capacitors got really hot. So I'm going to order some caps.

In related news, the crt tests near-zero on my tester. However it tests the known-good Admiral's tube at just above one. I've figured out that all the resistors in my tester have drifted high, and doesn't make the 300v it should be making. I'll be getting resistors for that too.

Also, there are two capacitors to ground from line and neutral on the plug. Do those need to be special capacitors to handle line voltage (all the time)?

Last edited by MadMan; 12-01-2019 at 09:31 PM.
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