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In the Forum: Melquiades Amplifier
In the Thread: R22
Post Subject: Measuring resistance across a capacitorPosted by JJ Triode on: 1/3/2022
Domidaw, you are looking at the right things but there is something to consider: when you put a resistance meter across a discharged capacitor you see a low resistance initially because the battery in the meter is charging the capacitor a little, so current is flowing. The measured resistance will rise until it approaches a constant value, so you need to wait until the resistance stops changing. If C10 is OK and connected correctly, the resistance should stabilize at a very high value, I would guess in the mega-ohm range. If my theory is correct that the excess current of about .68A is leaking through C10, you will see a steady resistance of a few hundred ohms. The measurement at the tube socket is essentially the same because the DC resistance of the output transformer primary and R21 are small.
Please review the polarity of C10 carefully. On the side of C10 toward the camera in your photo there is a "+" at the bottom. At the top you have the terminal toward the camera connected to ground. Could this be backwards?
Good luck and by the way Happy New Year to all, JJRerurn to Romy the Cat's Site