MATRIXSYNTH: EMS Synthi A mk1 reverb/outboard PCB w/ rare GEL234F1 ICs

Sunday, January 29, 2023

EMS Synthi A mk1 reverb/outboard PCB w/ rare GEL234F1 ICs

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via this auction

"bought new from papz/portabellabz a month or so ago. only taken out of packaging to take these pictures

The board brings the very sought-after typical MK1 sound with more low-end and a nice overdrive at high output levels.
The top part is a replica of the most recent PSU circuit with an added +11V rail for powering amp ICs as in MK1 units.
The bottom part is a replica of the original MK1 output amps and reverb driver circuits.

the board comes calibrated and ready to use, swapping with the original one is straightforward, no soldering or modification or calibration is required."

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