06-07-2026, 03:51 PM
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
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




