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tube reverb driver in Guitar amp - impedance matching question

Posted by bdgregory (A) on March 3, 2015 at 08:56:50

I'm hoping someone can advise on potential risks of running too low, or too high primary impedance in the reverb transformer shown in the gibson amp attached.

The original transformer died, and I subbed in an O/T from a little SE amp. It works fine, but not ideal, but I want to run it with this installed for a little while. Depending on which tank I use, I believe the 12AU7 is seeing either 5000 ohms, or as much as 1Mohms. I think that the original transformer would run more like 15000 - 25000 ohms.

Will I damage the amp running it this way for a few months, so long as I don't drive the reverb too long or hard?

thanks in advance!

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