Quote:
Originally Posted by NoPegs
Has anyone tried to calibrate one of these things? I mean just improving the overall accuracy, not anything excessive like you'd do for a scope or VTVM... Seems to be a calibration pot inside, and the manual mentions factory re-calibration. I'll take any tips I can before pushing into new territory and experimenting myself.
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From my experience with a Heathkit cap tester and looking at the CB-1-60 schematic, if there is a pot inside it isn't stock.
The only stock calibration on the Heathkit involved loosening the dial shaft lockscrew while measuring a know capacitor and moving the dial until it shows the correct value. I would use a value near the middle of the middle range. I ordered a 5% cap from Mouser (or was it Digi-Key?). If the other cap ranges are then off then the bridge reference cap value(s) would need to be changed. If you are going to re-cap the bridge cap I would use 5% anyway.