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Shindo Labs Sound Create Producer

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Old 02-02-2019, 05:44 PM
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Labpro Labpro is offline
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Default Giscours Tube Question

Quick question for Giscours owners.

I need to replace my GE 6072 phone tubes.

There are quite a few NOS 6072"A" tubes out there.

I believe the "A" has something to do with the warm-up protocol.

Can you tell me if it is OK to use a 6072 and 6072 "A" in the same circuit?

Also, is it OK to use 2 of the 6072"A" tubes in the Giscours phono circuit?

Thank you for the advice!

Labpro
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Old 02-02-2019, 06:40 PM
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6072A is a low noise 12ay7, early RCA Blackplates would be a good susititute or the far harder to find military Raytheon 6072 in coffin boxes...
Good Luck.
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Old 02-02-2019, 08:10 PM
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Hi JPrest,

Thanks for getting back to me. I'll keep an eye out for the Raytheon tubes.

Any reason what I cannot use a 6072 and 6072A (at the same time) in my phono section?

Thanks again,

Labpro
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Old 02-03-2019, 10:38 AM
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No the noise floor difference is not that great, it's more that the "a's" were individvally tested to assure they meet spec
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