Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: kagliostro on January 14, 2014, 06:41:34 am

Title: Is this a real active Baxandall TS ?
Post by: kagliostro on January 14, 2014, 06:41:34 am

I've find this schematic in a site where it is described as an active Baxandall TS

is it really an active TS ?

Thanks

K

Title: Re: Is this a real active Baxandall TS ?
Post by: sluckey on January 14, 2014, 07:08:47 am

Quote

is it really an active TS ?

Yes. Look at the mic channel. Notice C8 connects from V3 plate back to the TS? That puts the TS in a negative feedback loop between the plate and grid of V3. The gain of V3 becomes frequency dependent on the TS knobs.

Title: Re: Is this a real active Baxandall TS ?
Post by: kagliostro on January 14, 2014, 07:42:19 am

Thanks Steve

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BTW 6H8C means 6N8S and 6N8S = 6SN7GT

Franco