03-13-2015, 06:41 AM
Keith, the cathode of the 6A7 (pin 6) is grounded on the second type schematic. There may be one, two or even no resistors actually connected to the socket pin since any convenient chassis ground will serve the same purpose. Is your pin 6 directly connected to chassis or is there a 300 ohm resistor to chassis ground?
When they drew the schematic, it was easy to draw the resistors as shown, but it does not necessarily imply that they were actually located and connected there.
When they drew the schematic, it was easy to draw the resistors as shown, but it does not necessarily imply that they were actually located and connected there.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
