Caps

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CLynch7

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How long does a capacitor hold a charge? I've got a Philco 39-119 radio that needs re-wired, and I don't have the gear to safely discharge caps. Thanks in advance!
 

gewecke

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That capacitor can stay charged for a LOOOONG time! If you want to discharge it,you can take a insulated long handled screwdriver and short it out against the chassis of the set but be ready for a loud pop!
I love doing that with caps,lol!
N9ZAS
 

zz0468

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If it's got bleeder resistors in place, you'll miss out on the *SNAP!* when you short the caps. =(

But DON'T skip that part just because the resistors may be there! "gear" to discharge caps? Like the man said... the "gear" is a screwdriver.
 
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step 1. Place thumb securely on chassis near capacitor.
step 2. Gently touch index finger gently to capacitor plus terminal.
step 3. Jump back immediately after touching terminal.
step 4. Shake hand vigerously while dancing on floor.
step 5. Open fresh can of beer and consume while considering new hobby.
 

AB4BF

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Use a screwdriver you're not too fond off. The current sometimes blows holes in the shank.


rfradioconsult: step 1. Place thumb securely on chassis near capacitor.
step 2. Gently touch index finger gently to capacitor plus terminal.
step 3. Jump back immediately after touching terminal.
step 4. Shake hand vigerously while dancing on floor.
step 5. Open fresh can of beer and consume while considering new hobby

I had 450VDC knock me off my stool. Had shorted all but one of those suckers in a Halicrafters SX 38. Boy, you you don't forget that. :mad:
 

gewecke

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step 1. Place thumb securely on chassis near capacitor.
step 2. Gently touch index finger gently to capacitor plus terminal.
step 3. Jump back immediately after touching terminal.
step 4. Shake hand vigerously while dancing on floor.
step 5. Open fresh can of beer and consume while considering new hobby.

...and step 6. !@@#$^&***&^%$$## stupid radio,lol!
 

10-75

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Just a FYI...... It's generally not a good idea to arbitrarily short a cap to ground....Doing so can cause internal damage to the cap....It is best to take it to ground through a 1k resistor...... And yes, I too have dammaged many good screw drivers....:lol:
 
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