Quote:
Originally Posted by Chris K
I will double check the voltages and provide a better overall picture of the issue later this evening. Thanks for your thoughts...as always!
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Just want to state some of my previous voltage posts were done current limiting through a 500 watt bulb so the numbers below are the real numbers at 120V AC. Also, R153B that is supposed to be 630 ohms has a 500 ohm resistor in place. I have the appropriate one on order but the lower value one in place may skew some things a bit from the schematic voltages.
All the distributed voltages off the bleeder resistor package are close enough. I've got +230V, +149V, -3.6V, -15V, and -86V. I've got around +290V out of the 5U4.
OK...I checked voltages on V104B the 6AL5 and all the pin voltages are fine. The voltage running into C120 from that tube is -3.5 volts and on the other side, it's registering the -38V DC mystery voltage I'm trying to track down. Next, I checked the 12AU7 pin voltages and all of them are spot on except Pin 6 which is -38V. Pin 2 on the CRT is the same -38V and now (another WTF) I've got only +70V on Pin 11 of the CRT. Pins 1, 10 and 12 are fine at +150, +150 and +300 volts respectively.
Maybe I should reach out in some way to the community here to see if anyone with the knowledge to help me lives in the area around Philadelphia PA. I've made a mess of this and I know this forum communication isn't ideal and I'm sure I'm annoying and frustrating everyone who have tried to help. My apologies...again!