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37-640 wiring question
#33

Hello all. I am back working on the alighnment of my 37-640. as you'll recall from earlier posts, I could not get any adjustments on the IF amp 33S and 33P so I removed that same transformer from a spare 37-620 I am using for parts and installed it in the 37-640 and it now adjusts fine when finishing the IF adsustments.
Now here is where I need help when moving on to the Tuning Range -7.3 to 22.0 MC step. I do not see any meter movement while adjusting 23B, 8B and 4B in that first step.
I still have the meter connected to pin 3 (plate) and pin 8 (cathode) of the 6F6G tube per the instuctions.
I have the sig gen positive lead connected to the antenna terminal marked (red) which I beleive is number 1 and the ground lead is connected to antenna terminal 3. I have the strap across terminals 2 and 3. and nothing on ternimal 4.
Question#1 What setting and effect should the volume control be on the receiver
Question #2 Can someone explain what is meant where is says to connect a venier tuner of 350ppf across the oscillator section of the tuning condenser. Does this mean I need a separte tuner?
Thanks so much for any help, John


Messages In This Thread
37-640 wiring question - by georgetownjohn - 04-21-2026, 02:50 PM
RE: 37-640 wiring question - by morzh - 04-21-2026, 03:12 PM
RE: 37-640 wiring question - by RodB - 04-21-2026, 04:17 PM
RE: 37-640 wiring question - by georgetownjohn - 04-21-2026, 08:00 PM
RE: 37-640 wiring question - by morzh - 04-21-2026, 08:01 PM
RE: 37-640 wiring question - by RodB - 04-22-2026, 06:40 PM
RE: 37-640 wiring question - by georgetownjohn - 04-23-2026, 10:26 AM
RE: 37-640 wiring question - by georgetownjohn - 04-23-2026, 10:50 AM
RE: 37-640 IF trnsf question - by georgetownjohn - 04-27-2026, 01:08 PM
RE: 37-640 wiring question - by morzh - 04-27-2026, 01:17 PM
RE: 37-640 wiring question - by RodB - 04-27-2026, 01:55 PM
RE: 37-640 wiring question - by morzh - 04-27-2026, 02:00 PM
RE: 37-640 wiring question - by georgetownjohn - 04-27-2026, 02:30 PM
RE: 37-640 wiring question - by georgetownjohn - 05-24-2026, 09:39 PM
RE: 37-640 wiring question - by morzh - 05-25-2026, 11:44 AM
RE: 37-640 wiring question - by georgetownjohn - 05-26-2026, 10:14 AM
RE: 37-640 wiring question - by morzh - 05-26-2026, 10:32 AM
RE: 37-640 wiring question - by georgetownjohn - 05-26-2026, 01:58 PM
RE: 37-640 wiring question - by morzh - 05-26-2026, 02:29 PM
RE: 37-640 wiring question - by georgetownjohn - 05-26-2026, 03:46 PM
RE: 37-640 wiring question - by morzh - 05-26-2026, 03:59 PM
RE: 37-640 wiring question - by georgetownjohn - 05-27-2026, 01:03 PM
RE: 37-640 wiring question - by morzh - 05-27-2026, 01:42 PM
RE: 37-640 wiring question - by georgetownjohn - 05-29-2026, 03:54 PM
RE: 37-640 wiring question - by georgetownjohn - 05-29-2026, 04:05 PM
RE: 37-640 wiring question - by radiorich - 06-04-2026, 08:53 PM
RE: 37-640 wiring question - by RodB - 06-04-2026, 09:00 PM
RE: 37-640 wiring question - by RodB - 06-04-2026, 09:04 PM
RE: 37-640 wiring question - by radiorich - 06-04-2026, 09:46 PM
RE: 37-640 wiring question - by georgetownjohn - 06-05-2026, 07:11 PM
RE: 37-640 wiring question - by georgetownjohn - 06-07-2026, 03:51 PM
RE: 37-640 wiring question - by morzh - 06-07-2026, 06:51 PM
RE: 37-640 wiring question - by georgetownjohn - 06-07-2026, 08:28 PM
RE: 37-640 wiring question - by georgetownjohn - 06-07-2026, 08:30 PM
RE: 37-640 wiring question - by morzh - 06-07-2026, 09:22 PM
RE: 37-640 wiring question - by georgetownjohn - 06-09-2026, 10:06 AM



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