I have a Dr Z Remedy head in that I mentioned in another thread for a different reason. Came in with two dead 6V6s, one cracked, and one just not conducting or producing anything on my tester. The remaining two are red plating. This is cathode biased with two cathode resistors, one for each pair of tubes. Thinking the cathode caps were shorted, since they are right up touching the cemeent cathode resistors, but that means both of them must be bad, because the tubes are red plating in all sockets. But, both 150R 10 watt resistors measure 151R in circuit, so it sure doesn't look like the caps are shorted, but I lifted one anyway. I put a tube in one of the two sockets that connect to that cathode resistor, and the tube still red plated. So did a substitue tube from my stash.
So I ask, what could be happening? Pretty simple circuit, so if the resistor measures right, and the cap is out, what else could make a cathode biased tube pull around 100mA? No schematic available that I could find.
So I ask, what could be happening? Pretty simple circuit, so if the resistor measures right, and the cap is out, what else could make a cathode biased tube pull around 100mA? No schematic available that I could find.
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