| Electronics > Repair |
| General Radio 1396B Tone Burst Generator - Understanding power supply |
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| coppercone2:
I don't know, I am saying if you really need convincing you can figurre it out, but I would keep everything that measures ok. |
| barbaroja:
coppercone2 big thanks for your help, learning a lot. Alright, just measured all of them. Just a made-up procedure where I charged them all to 10v with a controlled current and let them sit to see how they discharge. I recall reading in a manual of old vintage gear (cannot remember which one) that one could measure the discharge time with no load as a indicative of cap health. All of them but the big dual 400uF on the square terminal took more than 6 or 7 minutes to discharge to like 25%. The bad one was just a few seconds, so I guess the test does work. Interesting, the leaky 500uF Sprague on the scaler supply did just like the good ones. That one should not be as hard to get, tho. |
| coppercone2:
it is possible that it leaked and someone replaced it without cleaning pcb and that it is a good cap, hard to tell unless there is visible damage near the leads or whatever I notice the better repair people, they mark the replacement parts with something like a scribe or paint marker. |
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