I have finished the design for the Jensen Twin Servo 500, a variation of the original Jensen Twin Servo 990 Mic Preamp for the Lunchbox/500-series format. Here is the link to the pdf with preliminary information:

http://www.johnhardyco.com/pdf/JensenTwinServo500Preliminary.pdf

Don't hear much talk about the Jensen Twin Servo around here. Mercenary's description says it is the best mic preamp ever made, for what that is worth. Anyone use one? I am curious if anyone has done a comparison to the SCA J99 preamp, which is basically a clone for the most part.

Well, I'm trying to plan my electronics projects for the summer, and I have a nagging impulse to build some high quality mic preamp's. I've been using console pre's on my A&H or whatever I can borrow at the time, but I want something good. I'm thinking clear and clean would serve me best, but maybe some flavor too.