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Post by 238 on Jun 4, 2022 21:55:07 GMT -5
I was trying to check C19B half of the 10mfd x 450V. Unhooked the wire going to it. I hooked my cap meter to it got no reading. Checked with ohm meter no reading. Is that the correct way to check it? I hooked a 10x450v to the wire. Radio working good now with good audio. Jim/238
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Post by 2600 on Jun 7, 2022 22:52:38 GMT -5
A good capacitor should show no reading on ohms. So will a bad one unless it's shorted. Your cap was not a short circuit, but an open circuit, since the capacitance reading was zero. We routinely replace both halves of C19 each with a radial-lead cap. Each one goes to the far end of the red wire on that lug. The red wire that leads over near the transformer can be removed altogether once a new cap is soldered to the tie-strip lug at the red wire's far end, and the cap's negative lead to the ground lug alongside. The side of C19 with the resistor on it just gets both the resistor and the wire pulled off of it, and lap-spliced to each other. At the far end of this red wire is pin 1 of V8, the 12AU7. The positive lead of the second 10 uf cap goes to pin 1, the negative lead to a ground lug on that tube socket's ring.
Seems to me I had this detail included in a post showing the whole re-capping procedure.
Years ago. I should look it up.
And I never bother to test C19. Even if it were good today, you can't trust it for long.
73
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Post by 238 on Jun 8, 2022 22:03:43 GMT -5
OK Thanks a lot. Jim/238
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