Heathkit IT-11 Capacitor Checker - Magic Eye View - Leakdown testing

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Testing an old capacitor for DC leakage from the late 1940's, showing why powering up old equipment often leads to a fire or smoke using the Heathkit IT11 Capacitor Checker

Functional equivalent IT-28
  1. Retro Tech & Electronics
  2. heathkit
  3. it-11
  4. electronics
  5. it11
  6. capacitor checker
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Electrolytic caps can sometimes be reformed, because you're essentially rebuilding the oxide layer inside the cap, but paper caps like this one can't really be "reformed" like that. Once the paper starts breaking down and leaking, it's finished as a capacitor.

drtidrow
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Thanks for the video. I have just bought a C3 which has just arrived and I also bought an IT-11 which hasn't arrived yet. Both will need new caps. I am restoring several vintage mil receivers and I'm sure many caps will be leaky so will prob end up changing them all but I think it will be interesting to see the state of the caps.

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