BEST PCB Manufacture in USA? VOCODER PCB...

[Kevin Peek]

I am almost finished working out the design, or re-design of my vocoder PCB.

I have decided it should have the following features:

12db or 24db selectable filters on both Audio and Carrier signals
         --using a single quad OP-AMP for the Band-Pass Filters with a SPDT
switch

a much more simplified Envelope Follower (from Scott Bernardi/Polyfusion)

A Jorgen  Bergfors' LM13600 VCA with log CV response



I have a single channel fitting on 4 1/2" by 5" inch 2-sided PCB.

Who should I use to manufacture the PCBs?

I need to get about 40 single channel boards made. (Two 20 band vocoders)

If its cheaper, I can always combine two or even three channels on to a
single PCB.