35W4 VS 36AM3B

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35W4 VS 36AM3B

Post by Guest on Mon Mar 03, 2014 12:38 pm

Has anyone tried substituting the 35W4 and 36AM3b? Looking at the tube data sheets they appear to pin out the same and the heater voltage difference is not much.

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Re: 35W4 VS 36AM3B

Post by Wildcat445 on Mon Mar 03, 2014 12:47 pm

I have not tried that. How about the tap for a pilot light? I don't have my tube manual here, so I'm not gonna be much help. Somebody tried to tell me awhile back that you can change out the 32ET5, 18FW6, 18FY6, 18FX6 and 36AM3 with the traditional complement of 35W4, 12BA6, 12BE6, 12AV6 and 50C5 complement. I have not investigated that. The "odd" tube complement I just mentioned was introduced before everything went SS, something to do with RCA patents. We had a thread on here about that no too long back. If you need a 36AM3 or some of the other ones, let me know. I could spare some.

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Re: 35W4 VS 36AM3B

Post by Guest on Mon Mar 03, 2014 12:49 pm

How about the tap for a pilot light?

It's also the same.

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Re: 35W4 VS 36AM3B

Post by Wildcat445 on Mon Mar 03, 2014 12:53 pm

It might work, then. Do you have a working parts set you could try it on?

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WC

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Re: 35W4 VS 36AM3B

Post by Guest on Mon Mar 03, 2014 12:57 pm

I have some 36AM3B's I might try in place of a 35W4 in a working set. I'll post back later on the results

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Re: 35W4 VS 36AM3B

Post by Guest on Mon Mar 03, 2014 1:06 pm

OK..... I tried it on an RCA 6-X-5 I installed the 36AM3B in place of the 35W4 and it played just fine. But........the 36AM3B got very bright! I'm sure it wouldn't last long, this has to be a current issue.

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Re: 35W4 VS 36AM3B

Post by Wildcat445 on Mon Mar 03, 2014 1:08 pm

What are the current ratings for each tube? Do you have a tube manual?

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WC

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Re: 35W4 VS 36AM3B

Post by Dr. Radio on Mon Mar 03, 2014 1:34 pm

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Re: 35W4 VS 36AM3B

Post by Guest on Mon Mar 03, 2014 1:58 pm


How quick we forget!  Embarassed  Thanks for getting me straight Doc.  Smile 

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Re: 35W4 VS 36AM3B

Post by mr_ed01 on Mon Mar 03, 2014 4:20 pm

36AM3 - 100ma filament current, 35W4 - 150ma

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