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 Post subject: this the correct of replacing this type of filter capacitor?
PostPosted: Sep Tue 28, 2021 8:16 am 
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Joined: Sep Tue 14, 2021 4:01 am
Posts: 34
i got a very late tube radio that i've replaced the filter capacitor. anyways its an external grounding can where all 3 lugs go to a different ground trace. ive replaced both values to their respective positive lugs and sent each to a different ground trace and then from both them negatives i ran 2 jumper wires to the 3rd ground trace. so i think i got it correct but just wanna double check here first just in case im about to burn the house down XD.


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 Post subject: Re: this the correct of replacing this type of filter capaci
PostPosted: Sep Tue 28, 2021 9:05 am 
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Joined: Aug Wed 14, 2019 6:56 am
Posts: 341
Location: angeles city.philippines,2009
if i understand you correctly the jumpers go to ground, it looks to me that one trace is clearly marked POSITIVE +. dont know what you have there but dont you think it might have been easier and neater to restuff the old can and reinstall it? but i do see what you are saying,but that positive + is a bit baffling. it looks like those all tie together at any rate. im not too jazzed with the jumpers being uninsulated.


Last edited by fonebone on Sep Tue 28, 2021 9:17 am, edited 1 time in total.

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 Post subject: Re: this the correct of replacing this type of filter capaci
PostPosted: Sep Tue 28, 2021 9:10 am 
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Joined: Feb Wed 07, 2018 6:52 pm
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Location: Stone Mountain, GA
That looks correct.

Many miss the fact that single side boards use the can as a jumper between grounds.

Personally, I'd have put the jumpers on the top side. Just an OCD thing on my part. ;)

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 Post subject: Re: this the correct of replacing this type of filter capaci
PostPosted: Sep Tue 28, 2021 1:50 pm 
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Location: Near Brandon, Iowa
Electrically OK; I would have slipped some spaghetti tubing over the bare wires to minimize the chance of a short.


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 Post subject: Re: this the correct of replacing this type of filter capaci
PostPosted: Sep Wed 29, 2021 9:13 pm 
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Location: Vancouver Island, Canada
If you haven't plugged it in to test yet, I would recommend you build a dim bulb tester.
A simple design is to cut one leg of a cheap two-prong extension cord.
If it's a polarized cord, choose the hot side, narrow blade side.
Install a lamp holder and a 40 Watt incandescent bulb (old type) or 60 Watt.
Then plug your radio into that cord to power it up. Bulb burns bright, something ain't right.

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