Re: 'PC Speaker' Tube Amp

"Paul" <paulguy@[EMAIL PROTECTED]
> wrote in message 
news:o70h44pprf4j2agmd3mutmmpfd00ev1010@[EMAIL PROTECTED]
> On Tue, 20 May 2008 21:57:48 -0500, flipper <flipper@[EMAIL PROTECTED]
> wrote:
>
> ....snip!.....
>   Here I am replying to an old thread.
>   I tried using a positive internal feedback loop in a SET amplifier
> that has a global negative feedback loop. By coupling two unbybassed
> cathode resistors to each other through another resistor, I was able
> to reduce the 2nd and 3rd harmonics by about 10db, with a small change
> in overall gain. I'm impressed with this "trick"! Really, it is a very
> small modification, and distortion is reduced by a factor of 3!

Please clarify.  Do you mean joining the bottom ends of the two
resistors with a common (third) resistor to ground?  What were
the values?

Best regards
Iain