12-02-2013, 07:54 AM
Take a look at this schematic:
http://www.nostalgiaair.org/PagesByModel...013233.pdf
It appears that the AVC circuit of this 38-10 model is wired the same way as what you now have (with 6Q7G instead of the 75, but same function). You can see the two 1 Meg resistors connected to the diode plate, with the mica cap connected to the IF coil.
The 250K triode plate load resistor should really not make any difference in operation.
Check the operation of the AVC, because if you remove the 1 Meg resistors, you may disable the AVC function.
Let us know what you find.
http://www.nostalgiaair.org/PagesByModel...013233.pdf
It appears that the AVC circuit of this 38-10 model is wired the same way as what you now have (with 6Q7G instead of the 75, but same function). You can see the two 1 Meg resistors connected to the diode plate, with the mica cap connected to the IF coil.
The 250K triode plate load resistor should really not make any difference in operation.
Check the operation of the AVC, because if you remove the 1 Meg resistors, you may disable the AVC function.
Let us know what you find.
