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Kepco JMK 15-6 rear connector pinnout
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PerpetualWalnut:
I have an old Kepco JMK 15-6 without any info on the rear connector. I can't find any info on it online either. So I dug into the circuit and did some minor reverse engineering and a lot of brute force trial and error to figure out mostly what it does and it's quite simple, but necessary to connect it correctly to use it as a general purpose bench supply. I'll list the pinnouts that I found with a brief description of what I think it does for anyone else with one of these.

PIN 1: Frame Ground.

PIN 2: Blank

PIN 3: NC

PIN 4: NC

PIN 5: NC

PIN 6: Internal Capacitor Bank (-)

PIN 7: Output (-)

PIN 8: Front Panel Voltage Pot connected to PIN 7 through I diode.

PIN 9: NC

PIN 10: NC

PIN 11: Connected to PIN 14. Not sure what it does.

PIN 12: NC

PIN 13: Connected to front panel Voltage Pot

PIN 14: Connected to PIN 11. Not sure what it does.

PIN 15: Output for Current Limit. Used as current source with Voltage Pot to make reference voltage for output regulation.

PIN 16: Voltage Limit? Applying any voltage here limits the output voltage and makes front panel lights switch from CURRENT mode to VOLTAGE mode.

PIN 17: Not sure, but connecting to Output (+) gives a boost in max voltage from 15V to ~17.75V

PIN 18: Internal connection to Output (+)

PIN 19: Internal Capacitor Bank (+)

PIN 20: Not sure.

PIN 21: Output Voltage Control. What ever voltage goes in here, comes out of the supply.

PIN 22: Internal connection to Current Pot and Current Shunt

PIN 23: An output from the voltage control amp? Not sure.

PIN 24: Blank.


In the image attached, the red wires are the connections I made to make the power supply work. The front lights only switch when sending a voltage to PIN 16.

Hope this helps anyone else who decides to take a wack at one of these with no other info! Good luck. And if you have any info, please post it!
coromonadalix:
not sure its the same with the ATE series, the ATE series have schematics floating around ...  the 3/4 rack i have

Normally  it was a short plug screwed on the back  for normal operation,  i myself had to make some shorts too  to make it work, since i did not have this plug i soldered an idc connector instead ....


they have a tendency to use the same connector on many models,   but you have to check  to be sure

some infos who could be helpful

https://neurophysics.ucsd.edu/Manuals/Kepco/ATE%206-10M.pdf
http://manuals.repeater-builder.com/te-files/KEPCO/KEPCO%20ATE%2036-3M%20Instruction.pdf

https://neurophysics.ucsd.edu/Manuals/Kepco/BOP%2036-6M%20Power%20Supply.pdf
alm:
I'm missing remote sensing connections, which would normally be adjacent to output terminals. Maybe pin 8/17? The connections for the capacitor bank are so you can choose if you want to connect the output capacitor or leave it disconnected for faster programming speed / current limiting. I would also suggest looking at other power supplies to see what kind of connections they have.

I couldn't find the pinout for the connector that mates to PC-12 of the ATE (they strip schematics out of the manuals on their website), but here's the pinout for the connector mating to PC-12 of the more complicated four-quadrant Kepco BOP.

I have a copy of the Kepco Power Supply Handbook from 1965. It describes the design and theory of designing power supplies in 1965. As appendix, it includes simplified schematics of a number of their power supplies. I don't know if any of them is similar to the JMK, but just in case I scanned those pages and attached them as PDF.
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