[georgetownjohn]

MORZH, Thanks for the help as always. Yes I have more to learn as you point out. I have the meter switch set to DC+/AC volts. But guess what ahppens when I remove the grid cap from the 6A8G, no change --470KC tone is loud and clear and adjustments still work on 34S and 34P. I beleive that ths may be because of the change Philco made on IF transformers on my run as described in Service Bulletin 250 for code 121- 37-620 and in Service Bulletin 253 for code 121-37-640. Fortunately, the spare parts chassis 37-620 I have is also this later run as is my 37-640. Concerning getting no results when adjusting 33S and 33P, I think that IF transformer is open. It is the one I had earlier opened becasue I could not get a good ohm reading. Soo I will take that IF transformer from my 37-620 chassis and install it in the 37-740.
Wish me luck, John