Thread: Testing tubes
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Old 10-07-2008, 06:28 PM
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gadget73 gadget73 is offline
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Quote:
Originally Posted by Philcofan42 View Post
Well, I'm sorry to say I didn't take a good enough look at the tubes until now. Some were in the wrong sockets, one of the tube shields was in the wrong place and some are just plain wrong. I know nothing about which substitutions are allowed so here is the list of what's going on with my tubes now:

1st & 2nd I.F. - both correct at 6U7G
Det-AVG - correct at 6J5G
Rect - should be a 35Z6G but is an 2576GT/G
Output - Should be a 25C6G but is an 25L6GT
A.F. - correct at 6F5G
OSC-Trans - no longer has any markings, but should be an 6K8G

Thanks again!
Dan
Thats probably a 25Z6, which is more or less compatible with a 35Z6. Its a rectifier tube with a 25v heater instead of a 35v. With todays higher line voltage, I'd suggest locating a 35Z6 to put in there so the heaters in the other tubes aren't stressed to take the excess voltage. The 25L6 will sub for a 25C6, so thats not a problem.
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