gofar99 Messages: 1939 Registered: May 2010 Location: Southern Arizona
Illuminati (5th Degree)
Hi, That is a good question and not clear from the schematic. But since there are two tubes per channel I would expect the voltage amp stage to use the low power portions of each tube and the inverter/driver to use the high power sections. According to my RCA book the low power section if pins 6,7,8 and the high power one 1, 3 and 9. heaters are 4 and 5. I hope this helps. let us know.