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 Post subject: Capacitor kit that might cover most tube radio replacements?
PostPosted: Jan Sat 11, 2020 9:42 pm 
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Posts: 114
Location: Bluefield, WV
Any suggestions on a kit that covers most of the capacitors that need replaced in older radios? Thinking of buying this


Axial Capacitor Kit #3 : 10 of each (100 capacitors) which includes:
.001uf, .0022uf, .0033uf, .0047uf, .0068uf, .01uf, .022uf, .033uf, .047uf and .1uf
$29.50 shipping included in the U.S.A.

from Sal's Capacitor Corner, but I don't really know what else I might need. It's kind of frustrating thinking that you are ready to start a project, only to find out there are a couple more items you don't have. Thanks.

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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Sat 11, 2020 9:46 pm 
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Location: Detroit, MI USA
You will find that if you repair very many radios, you will end up using 10X as many of the popular values like .01 and .047 and .1 as you do some of the others. Assortments are a good starting point, but you need to build stock on that after you figure out which you use the most of.

You need to stock at least a half a dozen different electrolytics as well based on what types of radios you will be repairing.

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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Sat 11, 2020 10:39 pm 
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You will never ever have enough .01's or .047's...Trust me. :wink:

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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Sat 11, 2020 10:44 pm 
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Location: St. Louis, MO
For me it's .1uF 400V. I use those like candy it seems.


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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Sun 12, 2020 12:26 am 
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Despite others' advice, I had to find out for myself...

A few years ago I bought a "kit." Ended up with a bunch unused, so I mix/matched (put them in parallel/series combinations) for the values I actually needed. For every radio that came onto the bench, there's always one or two items that needed to be ordered anyway.

Lesson learned: It would've been cheaper if I just ordered exactly what I needed for every restoration.


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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Mon 13, 2020 12:47 am 
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Location: Minneapolis, MN USA
As noted by Dennis, a kit alone will never suffice as you will always encounter some infrequently used values. It is possible to parallel or series to achieve values you don't have, but they tend to look ugly (especially series) and people naturally want to hit an exact matching value (even if not necessary). Plan on buy a few lesser used values as needed and buy a couple extra each when you do. As your recap different brands of radios you will also see the use of unusual values among the brands leading to the onsie-twosie buy problem.


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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Mon 13, 2020 12:51 am 
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I often make up $50 "shop stock" kits for beginners. I give them way more .01, .02 and .047 than others as thats what you will need. So I do a 'proportional mix'. And, electrolytics similarly. Otherwise, you will have a lot of left over caps. Dont know why the other cap sellers dont do it that way.
Mark Oppat


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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Mon 13, 2020 7:11 pm 
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Joined: Mar Thu 23, 2017 10:44 pm
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Location: Bluefield, WV
oldradioparts wrote:
I often make up $50 "shop stock" kits for beginners. I give them way more .01, .02 and .047 than others as thats what you will need. So I do a 'proportional mix'. And, electrolytics similarly. Otherwise, you will have a lot of left over caps. Dont know why the other cap sellers dont do it that way.
Mark Oppat


I've already ordered some, but will keep you in mind for next time. What website?

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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Mon 13, 2020 11:20 pm 
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Location: N. Palm Bch, Fl.
I got Sal’s kit and it’s perfect. It covers almost any tube radio you are restoring. At 30 cents a cap, you can’t go wrong. With that said. I just finished a 1940’s radio (My first) and it wiped me out of .047 and put a big hole in the .01’s. The Post WWII radios seem to like .02 so I see why Mark added them to the list.

Freeman


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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Tue 14, 2020 9:23 am 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: 253 Blanche St. Plymouth, MI USA
bufaloeletric wrote:
oldradioparts wrote:
I often make up $50 "shop stock" kits for beginners. I give them way more .01, .02 and .047 than others as thats what you will need. So I do a 'proportional mix'. And, electrolytics similarly. Otherwise, you will have a lot of left over caps. Dont know why the other cap sellers dont do it that way.
Mark Oppat


I've already ordered some, but will keep you in mind for next time. What website?


email me at m oppat @comcast.net (remove spaces).
I'll be at the Vintage Electronics Expo Sat, Feb 1 2020 Farmington Hills, MI www.thevee.org has info
Mark Oppat
Plymouth, MI


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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Tue 14, 2020 8:14 pm 
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Location: Vancouver Island, Canada
Right, order more than you need every time and build up the inventory.
As soon as you get a radio, download a schematic and write down the cap values. Sometimes this doesn't work, minor design changes.
Check inventory.
Rebuild the inventory.
Save empty bags, easy to see what's missing.

Some tube vendors also sell caps and resistors. When I order a tube or 3, I always get caps to top up the order.

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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Tue 14, 2020 10:29 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Minneapolis, MN USA
Another option:
Dave in Canada used to maybe still does make up customer kits for any radio.
www.justradios.com


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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Tue 14, 2020 11:11 pm 
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Joined: Oct Sun 06, 2019 9:04 pm
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Location: Raleigh, NC
You guys want cheap, I’m an airline pilot that flies to Shenzhen China quite a bit. Last time I was there I simply copied and paste the kit list from just radios and printed that out and sat it in front of a lady over at SEG electronics district. Came back an hour later with a bag of caps and total cost was 120 RMB(about 17USD). Was afraid to buy more till I got them home and checked them in the LCR meter. Seem fine to me and the radios I use are working great with them. Gonna load up on them next time I’m there. I even seen a few cans that look very similar to wet electronics. Not sure what they are about but gonna look into it next time.


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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Wed 15, 2020 12:01 am 
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So how many caps did you get for $17?


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 Post subject: Re: Capacitor kit that might cover most tube radio replaceme
PostPosted: Jan Wed 15, 2020 6:16 am 
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^ He might not be able to count that high... :wink:

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