Name:    Winnie Thomas
Email:   wthomas@vtlink.net  
Subject: MusicMan mods
Thread:  135
Time:    Thu, 02 Aug 2001 18:56:07 GMT

I built this amp a couple years ago. I modified a Musicman 2100-65 I had to all tube. Originally it had a solid state pre-amp and a tube power amp. The power amp section had a 12AX7 Phase Inverter, and two EL34's. It now has two Fender preamps. In Channel 1, the
Normal channel, is a Blackface. In channel two, the Bass channel, is a Blond Bassman preamp modified to have a middle control. The deep switch has been changed so that the Bass channel can be switched out of the circuit. I did this because the gain of the Normal channel is increased when the bass channel is switched out. The bass channel is unchanged whether the normal channel is in or not. Both channels have the bright switches activated. They almost act like a boost.


Here's the original amp


http://soiuser.hyperchat.com/ax84/Solidstatepreamp.jpg


Here's the new circuit board:


http://soiuser.hyperchat.com/ax84/tubepreamp.jpg


Here's the top view"


http://soiuser.hyperchat.com/ax84/extratubes.jpg


Winnie Thomas