11-08-2023, 01:26 PM
I picked up one of these tiny consoles that uses a Warwick 5 tube chassis recently and found someone in the past (who tried recapping it) majorly butchered it to the point it's going to require a full schematic tracing to get some sound out of it. There is no audio output at all. To further complicate things, there are two schematics, one for a 510 C and one more generic Model 5-tube chassis that are basically the same, but with a few subtle discrepancies.
http://www.nostalgiaair.org/PagesByMode ... 023105.pdf
http://www.nostalgiaair.org/PagesByMode ... 023102.pdf
Compare the volume control on each. It appears that the potentiometer is R7 on the 510 C chassis, but on the 5-tube chassis schematic, it's R8? On the 510 C chassis R7 is 500K, and on the 5-tube chassis schematic R7 is 250K, which I believe is just a standard resistor and not the potentiometer?
One of the few solder joints that looks original also doesn't correspond with either schematic. Using the tube pin out, it appears that both C4 and R4 should be going to pin 4 on the 6D6? On my set, pin 4 and 5 of the 6D6 are joined together and C4 and R4 are physically going to pin 3 on the tube socket.
http://www.nostalgiaair.org/PagesByMode ... 023105.pdf
http://www.nostalgiaair.org/PagesByMode ... 023102.pdf
Compare the volume control on each. It appears that the potentiometer is R7 on the 510 C chassis, but on the 5-tube chassis schematic, it's R8? On the 510 C chassis R7 is 500K, and on the 5-tube chassis schematic R7 is 250K, which I believe is just a standard resistor and not the potentiometer?
One of the few solder joints that looks original also doesn't correspond with either schematic. Using the tube pin out, it appears that both C4 and R4 should be going to pin 4 on the 6D6? On my set, pin 4 and 5 of the 6D6 are joined together and C4 and R4 are physically going to pin 3 on the tube socket.
Greg V.
West Bend, WI
Member WARCI.org