Quote:
Originally Posted by Geist
Hi All;
I used the Variac and took it up to 140 Volts and used the 300 Volt tie point right before the choke and used that connection to temporarily shorted pins 1 and 5 and 6 of the Socket for the 1st Video Tube a 6AU6, with everything disconnected from those pins except for the socket.. It seemed fine, no sparks, nor anything, so I think there are no shorts to those pins, especially to ground.. Now to put it all back together..
THANK YOU Marty
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Hah. By that account the socket is OK. The only thing left is the tube itself. I take it you don't have a tube tester?
If not, try this..
Connect everything back to the socket
except pin 5. Put the tube in the socket. Take a 10K resistor (or some value in that ballpark) and clip one end to pin 5 and the other end to the 275V source.
Consider that resistor sacrificial, because if the tube shorts, it will quickly fry the resistor in lieu of frying the resistors R140 and R141 which got smoked originally.