Who wants a 2:90 bias mod?

Triaxis, Quad Preamp, Stereo Power series, Recto Preamp

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Bottle Rocket
Posts: 15
Joined: Sat Mar 12, 2011 12:55 pm
Location: Chicago, IL Gimmie that booze ya little pumpkin pie hair-cutted freak!

Who wants a 2:90 bias mod?

Post by robguitargod1 » Tue Mar 22, 2011 12:08 am

I'm currently designing a bias mod for my 2:90 and will offer it to other 2:90 owners should they be interested. Pro are:

1) Adjustable bias (Duh)
2) You can now you any 6L6 tube you want, and skip the expensive Mesa tubes.
3) Very minimal changes to the main 2:90 PCB that are easily returned back to stock (but why would you want to do that!?)
4) My design includes a completely separate PCB and circuit that's designed, built, tested, simulated, and installed by myself.
5) There will be 4 bias adjustments. 2 for the class A pair, 2 for the AB pair (2 adjustments per amp channel)

Please let me know if anyone is interested. I'll keep you posted on the progress of my own 2:90.

Bottle Rocket
Posts: 3
Joined: Thu Aug 08, 2013 7:45 am

Re: Who wants a 2:90 bias mod?

Post by jesuis_lm » Fri Aug 09, 2013 8:42 am

Hi I would like to know how much is the bias mod? Can I install bias mod my self ? does not need to weld something? the problem is that I living in Venezuela and I can't send the simul 2:90 to you.


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