Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: ncusack on October 24, 2012, 10:59:55 am
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Hello Everyone,
I have a friend who would like me to build him a stand alone jcm800 preamp for studio work. I've never done anything like that before and would like to know if it would be as easy as finding an appropriate power transformer for the right preamp voltages and just tapping off the master volume for the output or if there needs to be a little more to the circuit in order to get a useable signal out. I know he's looking for something like the 2204 100W master volume sound if that helps.
I'm just looking for a starting point to run with if anyone can help.
Cheers,
Neill
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Doug did a stereo tube preamp here:
http://www.el34world.com/projects/StereoPreAmp1.htm (http://www.el34world.com/projects/StereoPreAmp1.htm)
Check there for his schematic, layout, voltages,
Maybe that will shed a little light on your design.....good luck,,,,that sounds like fun!