05-26-2026, 01:58 PM
Ok, now I have run into a problem in trying to do the IF alighnment. The meter I have to use is a Triplett 630PL. I am following directions in the 37-640 and it says to set the meter to 0 to 30 volt range. I assume that should be AC volts? I do not have a 30 volt range and I including an attached photo of my meter if that helps. Here is the first problem I am running into. I have connected up the meter to pins 3 and 8 on one of the 6F6G tubes as it says and when I turn on the radio, the meter pegs out to max when connected to the meter ac volts and common connection. But when I put the red meter lead in the output connection of the meter, it seems ok by not pegging to the max of the meter. However, I do not get any results in adjusting 34S/34P, 33S or 33P. During this time I had the sig gen connected up to the grid cap of the 6A8 tube with a .1 cap per the instructions. I did however, have the grid cap connection from the tuner removed from the 6A8 while doing this.
Now, if I connect the sig gen to the grid of the 6K7 IF tube, I hear my sig gen tone loud and clear and can adjust levels on 34s and 34P for the highest level. I do not get any results however when adjusting 33S and 33P.
I wish I was smarter and could explain the problem better. I know I must be doing something incoreectly and I hope someone can help me make sense of this. Thanks, john
Now, if I connect the sig gen to the grid of the 6K7 IF tube, I hear my sig gen tone loud and clear and can adjust levels on 34s and 34P for the highest level. I do not get any results however when adjusting 33S and 33P.
I wish I was smarter and could explain the problem better. I know I must be doing something incoreectly and I hope someone can help me make sense of this. Thanks, john




