1108 DIY project and PCB layout
posted by MNATS:
Way back when I announced the Rev A project I said that I would do a PCB for the 1108 preamp. More recently I implied that the board was nearly done but embarrassingly, it wasn't even close. I had just cut and pasted the audio chain of the Rev A onto a new PCB file named "1108".
So I took a few hours and have finally knocked out a stand-alone 1108 board:
It's pretty simple and single-sided but will hopefully encourage some experimentation with the circuit, input transformers etc. PCB has been tested. Self-etch and schematic here. On-board R/C is for the CMMI-7C so alter to fit your needs. Any high ratio input transformer will work - an old Jensen JE-115 was also tried with the prototype board.
I will have a very limited number of prototype boards available for sale in my White Market post soon.
USED GEAR PORTALS
