Thread: Masteradio D111
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Old 12th Feb 2023, 7:05 pm   #10
ViragoRider
Tetrode
 
Join Date: Apr 2022
Location: Nottingham, Nottinghamshire, UK.
Posts: 71
Default Re: Masteradio D111

I finished the recapping and the set is waking up now. On checking the voltages before and after the recap I note the Anode voltages have gone up slightly, but the screen voltages have shot up in comparison.

The Anode voltages before and after are as follows (using the Trader 829 servicing sheet)

V1 TH41 247 255
80 85
V2 VP41 251 255
V3 HL42DD 47 54
V4 PEN45 234 247
V5 UU6 237 247 (ac on each anode)

The screen voltages before and after the recap are

V1 TH41 96 130
V2 VP41 94 130
V4 PEN45 205 250

I'm a little concerned about the screen voltage of V1 and V2 now as the trader sheet quotes them at 87v. They are fed by R6, 25K resistor which tests at over 33K. I'll order some replacements and swap it out. Would this be the cause of the higher screen voltage? I think I need to check the other resistors too now, since R6 was so far out.
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