Quote:
Originally Posted by stusnyder
Ok while I was finishing replacing the paper caps, I spotted a date on the inside of the chassis, stamped in black ink, April 15 1935. So I assume thats when it was built.
Now I have a question, on the 25z5, no pins are marked, socket is not marked either. Looking underneath, do they go counter- clockwise? And how can I tell which is pin 1?
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The socket, viewed from the bottom, are clockwise numbered. The old UX base tubes, the thicker pins are number 1&6, for the 6 pin tubes. the 5 pin tubes don't have thicker pins, the 4,6 and 7 pin tubes do. The thicker pins are the heater or filament pins, depending on the tube number. The thick pin on the left would be pin number 1.