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 Post subject: Dramatic capacitor explosion
PostPosted: Jun Mon 17, 2019 9:32 pm 
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Joined: Dec Mon 08, 2008 8:27 pm
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Location: alameda,CA
I'm no stranger to exploded capacitors. But this one is one of the better ones. Its a 1940 RCA 110k console and when I first pulled the chassis I almost put it down because I thought it had been a rodent's nest.

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That is ONE capacitor. It literally shot all of its innards out, spewing it all over the interior of the chassis.


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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Mon 17, 2019 9:40 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 27723
Location: Detroit, MI USA
Yes, they can explode dramatically. I have seen quite a few do that, and some that the paper caught fire and melted wiring and other parts under the chassis as a result. (Usually those were the black beauty line bypass caps)
Imagine if you were working on that chassis, and sitting a couple feet away when that happened. :shock:

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Experience is what you gain when the results aren't what you were expecting.


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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Mon 17, 2019 10:02 pm 
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Joined: Apr Thu 12, 2007 3:24 am
Posts: 1991
Location: Milwaukee,WI
I'll bet the previous owner had to change his shorts after turning on that radio.


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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Mon 17, 2019 10:09 pm 
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Joined: Dec Tue 23, 2014 6:51 pm
Posts: 1260
Location: N. Palm Bch, Fl.
I've gotten a couple of radios where a cap has blown, but they just blew out the end. Nothing like this. I like the wire nut. Is that what we are suppose to use when we run out of solder and shrink tubing?

Freeman


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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Mon 17, 2019 10:15 pm 
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Joined: Apr Thu 12, 2007 3:24 am
Posts: 1991
Location: Milwaukee,WI
In 100's of radios I've owned and fixed, the only ones that blew up were the same cap on similar chassis of tube CB radios. After the 2nd one blew I started to replace them as the first order of business on future radios with that chassis. I read posts on forums of others having that same cap blow up. Its a loud pop, long hiss and a mound of stinky smoke. Upon inspection they blow out the side like a party favor.


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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Mon 17, 2019 10:29 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 722
Location: dayton oh usa
worst one i personally saw was a big can in an imsai 8080.
about the time i told my business partner to bring it up slow on a variac it went off like a 12ga.
he had simply plugged it in without thinking.
made a huge mess!
and yes i got it going.
never did try to play global thermonuclear war.
gotta pull it out and give it a try.


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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Mon 17, 2019 10:31 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 14544
Location: Fernandina Beach, FL
I had a Sony TC-630 motor run capacitor that exploded inside of the Tapecorder (As Sony called them). Mostly wax everywhere! What a mess.

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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Mon 17, 2019 11:53 pm 
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Joined: Jan Tue 31, 2012 1:55 am
Posts: 8850
Location: Mountains of Mourne. Ireland.
These are super comfortable and crystal clear. ~$10.00

After a few near misses over the years, I now religiously wear a pair of safety glasses when... on the bench.

Image

The ones pictured above are super light and fully adjustable.
Similar to Western Safety item#94357
or... 3M™ General Purpose Safety Glasses-90780-80025

Greg.

oh... remember this... :)
viewtopic.php?f=2&t=350874


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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Tue 18, 2019 12:08 am 
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Joined: Feb Wed 04, 2015 12:26 am
Posts: 883
Early 80's Sanyo color TV, this was around 1991. A small cap on the power supply blew it's top, and implanted about 3/4 inch into the suspended ceiling.

Thank God I wasn't standing above it.


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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Tue 18, 2019 1:20 am 
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Joined: Jun Wed 08, 2011 2:33 am
Posts: 8756
Location: Ohio 45177
Had some 60s vintage avionics that used two big metal can caps to drop 115 V down to 54 V into a transformer. The caps had sealed metal ends. When they would blow it looked about like that in a small confined area. Very messy. The can being solid metal tube it blew out the rather well sealed ends with a lot of force.

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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Tue 18, 2019 11:36 pm 
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Joined: Jan Tue 23, 2007 10:23 pm
Posts: 5362
Location: Chicago IL
Be sure to test it for leakage before powering on the set.

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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Wed 19, 2019 4:24 pm 
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Joined: Jan Thu 01, 1970 1:00 am
Posts: 6878
Location: The Great Pacific Northwest
Someone told me about an un-restored console that had an oil filled Cap explode which
covered the back wall. :shock:

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 Post subject: Re: Dramatic capacitor explosion
PostPosted: Jun Wed 19, 2019 4:48 pm 
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Joined: Apr Fri 28, 2006 5:57 am
Posts: 403
Location: Brownsville, Kentucky 42210
Smoke and explosions i sure do like excitement of that nature when i plug them in to full line voltage and turn them on. :D

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