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Author Topic: 6J5 to 6C45P?  (Read 84 times)

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Offline currly30

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6J5 to 6C45P?
« on: May 17, 2023, 08:10:54 PM »
Would I be able to use the 6J5 tubes with an adapter in place of the 6C45P?
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Offline Paul Birkeland

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Re: 6J5 to 6C45P?
« Reply #1 on: May 17, 2023, 08:39:08 PM »
Most definitely not a good idea!
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Paul "PB" Birkeland

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Offline currly30

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Re: 6J5 to 6C45P?
« Reply #2 on: May 17, 2023, 09:43:22 PM »
Why is that? Doesn't it have the same voltage and current?
« Last Edit: May 17, 2023, 09:53:11 PM by currly30 »
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Offline Doc B.

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Re: 6J5 to 6C45P?
« Reply #3 on: May 18, 2023, 04:17:21 AM »
Very different tube with much less gain, much less max plate dissipation  and much higher output impedance. The most feasible substitute for a 6C45pi is a WE437A. IME the 6C45pi sounds just as good as the 437A and even a bit better in some applications.
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Dan "Doc B." Schmalle
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Offline Paul Birkeland

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Re: 6J5 to 6C45P?
« Reply #4 on: May 18, 2023, 04:37:51 AM »
You'd also be running at nearly maximum cathode current, which would also likely shorten the lifetime of a 6J5.
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Paul "PB" Birkeland

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Offline currly30

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Re: 6J5 to 6C45P?
« Reply #5 on: May 18, 2023, 10:56:23 AM »
Interesting. Thank you for the information.
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