Replacing 7199 With 6GH8 And Comparing THD

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Replacing 7199 With 6GH8 And Comparing THD

Postby dspth » Mon Sep 02, 2013 5:15 am

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Re: Replacing 7199 With 6GH8 And Comparing THD

Postby dcriner » Tue Sep 17, 2013 1:38 pm

Looking at the RCA tube manual, I noticed a couple of differences between the 7199 and the 6GH8. The transconductances are significantly different. Also, for the 7199 (which is intended for a hi-fi audio amp), the specs include hum and noise - while no hum or noise specs appear for the 6GH8 (which is intended for television deflection circuit and sync applications). I'm wondering if these differences are of concern when using a 6GH8 with a pin-out adapter in an unmodified ST-70 driver board intended for 7199s?
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