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37-10 plate voltages 100 vdc high
#17

this radio works but not properly. i have recapped it and changed resistors #80, # 83, # 86 and replaced cap #31 with 18 mfd.
I have checked most resistors and changed out those that were broken, burned or out of tolerance.

Ok i am starting over. ECG DM-38A Digital multimeter measured to chassis.

osc control tube 6N7G CALLS FOR 260 VDC ON P1 & P2. Actual is 184.5 and 3.3 on K.
6F6G OUTPUT CALLS FOR 250 0N P & 235 on S and 260 on S & 250 on P.
Actuals are 295 & 290 / and / 274 & 264.
6A8G calls for 250 & 85 & (150 0sc plate), actuals are 285.5 & 78,5 and (osc p 135.4)
6K7G (if) calls for P=260, S = 85, & neg 2.5 / actuals are P=295.6, S 79.4, & neg 2.7.
6K7G (rf) calls for 250 & 85 and actuals are 284.5 & 79.5 and neg 2.7
6Q7G calls for 170 and actual is 116.6 on P.

signal is weak unless i hook up 80' of antena and signal is distorted if i was working on a guitar amp i would say it sounds like the pre amp is over driving the output or the neg bias on the outputs is too low making the output fuzzy.
terry


Messages In This Thread
37-10 plate voltages 100 vdc high - by ttmiller - 08-21-2015, 03:12 PM
RE: 37-10 plate voltages 100 vdc high - by ttmiller - 09-17-2015, 11:07 PM
RE: 37-10 plate voltages 100 vdc high - by Arran - 09-18-2015, 04:24 AM



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