Last edited by Tom Phillips; at So, I decided to spring for some unused, old, RCA tubes, in their original boxes. I suppose the metal ones provide better shielding. I found the listed as a substitute for 6J7 in the Tube Substitution Handbook. The tube socket holds the valve in place and provides terminals, which can be soldered into the circuit for each of the pins.

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Show More Show Less. Previous topic Next topic. This is tuhe EL36 schematic: Mullard Pair 2x 12at7 Ecc81 Tubes. Any variety of 6J7 will work.

Both listed as having the same basingso should be a drop in replacement. I think you should probably be able to find NOS. Maybe the tube looks tuge because the body is made of metal instead of glass. Dec Sat 29, 2: No Returns and no international shipping Thanks. Tubr the microphonics the same?

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If you send me a box with the postage attached I’ll send you a few 6SJ7s to play with – this would be the easiest socket conversion – I probably have some 6J7s also.

Antique Radio Forums • View topic – Good subsititute for a 6J7 tube?

The tube socket functions like an electrical socket into which vacuum tubes or valves are plugged. May Fri 16, May Sat 17, You will find the 6K7, although common, doesn’t work very well as a detector. No, these are not in production.

I’m a little late here but I just stumbled into this discussion. Some tubes have top connections. JC, what about the top connection? Shall I put that metal cap on top of the EL36 too? I attach here a schematic of the preamp section, in case it helps.

Tubes For This Machine!

That would suggest they are equivalent, but I have no direct experience that tueb confirm that. I don’t know the shape of these tubes. May Thu 15, 2: Ratings and Reviews Write a review.

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Thanks for your replies. Metal tubes were common in that era, but were replaced by glass versions. Carlo try an EF Read times rjd2 Hero Member Offline Posts: Dave Hecht wrote on Tue, 27 November No Hassle, looks new, works Like Tubbe

And this is the tube schematic:. Carlo, if you are going to use an El 36 use a porcelain anode cap that’s safe.

Originally Posted by slidincharlie Carlo P. Good subsititute for a 6J7 tube? The braid is soldered onto the top cap.