36272Epilogue Cromemco System 1
- Jun 3, 2014I used three scopes to compare with each other to learn how to read a scope and the knobs, generate a sign wave and use one scope as a wave generator in order to measure / calibrate the other scope with it. Etc. Not great at it yet but getting there. At least I understand better how these work. Thanks everyone (and youtube) for your help/tips.
Related to the Cromemco System 1 - I fixed the power supply. I removed the 590uF 20V cap from the 12v line of System 1 power supply and replaced.
I bought a Peak ESR70+ to test for bad caps. Seems to work very well.
Although the cap I removed was labeled 590uF / 20v, when I tested it I got 841uF and ESR - .13ohms.
Am I correct to interpret this to mean
1) They labeled the cap 590 but it was really a ~850uF
2) For a 850uF cap, an ESR of .13ohms is too high/marginally leaky
3) If it was really a 590uF an ESR = .13ohms would have been "more OK".
thanks and I will take my answer off the air.
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