10-02-2023, 02:57 PM
> I connected pin 1 to B- instead for ground.
Patrick, do you mean you changed pin 1 of the 12SQ7 from ground to B-, or from B- to ground? Please clarify.
In my 54C, my 12A8GT, 12SK7, and 12SQ7 tubes all have pin 1 connected to the chassis, and the radio plays fine. So I really don't understand what could be going on with yours.
Another thing to consider - I changed my set to use a PM speaker. It would not work correctly with the old field coil speaker after the modifications were done. However, it is great with the PM speaker.
Patrick, do you mean you changed pin 1 of the 12SQ7 from ground to B-, or from B- to ground? Please clarify.
In my 54C, my 12A8GT, 12SK7, and 12SQ7 tubes all have pin 1 connected to the chassis, and the radio plays fine. So I really don't understand what could be going on with yours.
Another thing to consider - I changed my set to use a PM speaker. It would not work correctly with the old field coil speaker after the modifications were done. However, it is great with the PM speaker.
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Ron Ramirez
Ferdinand IN
