via this auction
"Analog 'patch cord' monophonic synthesizer that contains all of the fundamental modules needed for music synthesis. I assembled this synthesizer in 1980 using 4700-series kits from the legendary PAiA Electronics, Inc. in Oklahoma.
This synthesizer was in “working” condition before I stored it away. I was already an experienced electronic kit assembler at age 18 when I assembled all of the modules. I used terminal strips to create “bus bars” inside the module cabinets to conveniently provide the three supply voltages (plus ground) to all of the modules. Once I got to college at PSU I begged an Electrical Engineering professor let me use a frequency meter in a lab to calibrate each key of the keyboard to the proper pitch. I recently applied power to the cabinets and proved that the power supplies are working, but their output voltages will need to be recalibrated according to the manuals. I say that this unit is “working”, but I never really got it to make the sounds I was hoping for…
I fell in love with synthesizers as a teenager during the 1970’s because I was into both music and electronics. I desperately wanted to buy a MiniMoog (despite the fact that I didn’t have any keyboard aptitude or training) but, in any case, my family didn’t have that kind of money for something non-essential.
I discovered PAiA Electronics when their first 2700-series synthesizer kits were featured on the cover of Radio-Electronics magazine in 1973. The cover picture showed a fully functional synthesizer built from kits – except that the keyboard was made of hand-bent spring wires with buttons glued to the ends in order to keep the cost down. A few years later PAiA started offering professional 37-note keyboards and enclosures.
I bought the road cabinet and the power supplies first in 1979. I bought the actual synthesizer module kits as I could afford them during 1979 and 1980. I finally raised enough money to buy the (approximately) $100 keyboard/case kit in 1980.
This synthesizer contains the following cabinets and modules:
