06-07-2019, 10:39 AM
OK, so the output xfmr is not on the speaker; this makes it a suspect.
I suggest then another way:
Do as you would during the alignment, putting the modulated signal through with your speaker connected.
First measure across the primary winding when supplying a good level of signal. Put the meter (use a DMM) om "AC Volts", so only to measure AC component and make sure you do have a good few (few tens maybe) of AC Volts of audio across the primary (Plate-to-Plate).
Then if you do (if you don't - you have other problems), move your meter to the secondary and see if you have the output. If you don't - you have a problem with the xfmr.
To confirm that, see if you have any good output transformer (you need a push-pull of course) and try to sub it.
PS: do you mean you have no Variac?
I suggest then another way:
Do as you would during the alignment, putting the modulated signal through with your speaker connected.
First measure across the primary winding when supplying a good level of signal. Put the meter (use a DMM) om "AC Volts", so only to measure AC component and make sure you do have a good few (few tens maybe) of AC Volts of audio across the primary (Plate-to-Plate).
Then if you do (if you don't - you have other problems), move your meter to the secondary and see if you have the output. If you don't - you have a problem with the xfmr.
To confirm that, see if you have any good output transformer (you need a push-pull of course) and try to sub it.
PS: do you mean you have no Variac?
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