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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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Tubes Asylum Questions about tubes and gear that glows. FAQ |
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In Reply to: RE: George Wright WLA10 help posted by JJ Triode on April 26, 2015 at 13:38:49:
...but it is different. Not octal sockets, to begin with.The 7-pin socket is for a rectifier tube, almost certainly a 6X4. The two shielded 9-pin sockets are the signal tubes. I would guess they take 12BH7 or similar tubes, but it would be best to measure the AC voltage between pins 4 and 5 ( clockwise viewed from the bottom, 4th and 5th from the gap in the pins near the front of the unit.) This requires measuring the voltage with the unit plugged in and turned on, but could be done from the top with the bottom cover closed, if you can insert voltmeter probes into the socket holes on top. (Remember to count the pins counterclockwise from that perspective. Take the unit to a technician if you don't feel comfortable doing this.) If the voltage is 12.6V, 12BH7's should work, if 6.3V, maybe 6CG7's are needed.
The regulator tube is hardest to guess. It could be something like a 6DR7, maybe a 6DE7 or 6EW7. I think 6DR7 is more likely as it fits the pinout and is closer to the octal 6EM7 electrically.
Edits: 04/26/15 04/26/15 04/26/15
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Follow Ups
- I was thinking it was the same as the WLA12 line stage... - JJ Triode 16:25:05 04/26/15 (1)
- RE: I was thinking it was the same as the WLA12 line stage... - frperdurabo 08:44:20 04/28/15 (0)
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