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 Rectifiers: Roll Your Own for Testing

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FrankB
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PostSubject: Rectifiers: Roll Your Own for Testing   2015-08-07, 10:06 pm

I have just run into a case of needing a rectifier (6CA4) to test a amp with. (Tube arcing, but tests good possibly too high plate voltage on it from unknown replacement transformer- or the filter can the guy bought new might be bad, but tests good).
Sadly I don't have one readily available- likely have one buried, yet to be found.

So I just thought- Why not make up a few bridges for testing. A couple of old octal sockets wired up with 1N4007's and one with higher current ones, a 7 pin base for the 6X4's, and a 9 pin base for the 6CA4.

 No need for a dropping resistor, these would be used to just make a quick test.

Make one capable of handling 6X5's and 5Y3/5U4/5V4/5R4 current & piv, as well as one for 80's and 5Z4.
 Likely cost to make the whole batch under 10 bux and an hour or 2 in time.
( Yes, I know they made solid state replacements for these. At a much higher cost too! (They also made ones for 1B3/1K3/1J3, 3A3, 3AT2, 1V2, 6AL5, 866, 872,  and others.)
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Cliff Jones
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PostSubject: Re: Rectifiers: Roll Your Own for Testing   2015-08-08, 9:01 am

One step further in the need to make rectifiers available. good idea.

I wonder if there is also a work around just using available tubes?

It would be a big project though. make tube adapters for going from one type of tube number to another? In other words adapting a 6X4 to a Insert different tube number Here.
study would take time & some charts and specs to design.

Maybe make some of each and offer to sell?

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FrankB
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PostSubject: Re: Rectifiers: Roll Your Own for Testing   2015-08-08, 4:53 pm

They did that in WW2 era. EBY Company made them as well as one other company I am aware of, (Maybe JFD?).

Mostly these are intended for a quick test, and replacement with the correct tube.
Pretty much all the tube rectifiers (Excepting oddball WE) can be replaced for testing by just a few plug in types.
 The 6CA4 is a pretty high dollar- like $30.00 +, audio equipment type, and I needed one for a conclusive test.
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