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46-1201 model 128 restore and question
jerryhawthorne
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City: Sedona, AZ/Placentia/CA
#13

11-17-2013, 05:11 PM
Tig, I'm far from the brightest bulb here but I question the 7C6 readings. I wouldn't worry about pin 1, you may have set the meter wrong. Should read very low A/C voltage. I would worry about pin 2 and measure that one again. Most voltage readings are semi close for using a DVM. They are high. The plate voltage (pin 2) on the 7C6 being sky high, indicates to me that tube is not conducting. Cathode not tied appropriately or tube really bad. Need to get that plate voltage down. Item 27 a 470K is the feed and should drop the voltage across it within specified range. Check the voltage on both sides. No change then tube or cathode is not wired properly.
Jerry
A friend in need is a pest!  Bill Slee ca 1970.
(This post was last modified: 11-17-2013, 05:16 PM by jerryhawthorne.)
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46-1201 model 128 restore and question - by tig1 - 11-07-2013, 06:47 PM
RE: 46-1201 model 128 restore and question - by jerryhawthorne - 11-17-2013, 05:11 PM



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