1959 Silvertone Syntronic Can Capacitor question - diyAudio
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Old 19th August 2012, 12:18 AM   #1
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Question 1959 Silvertone Syntronic Can Capacitor question

I have a 1959 Silvertone Console and I've replaced the electrolytic caps in the amp except for the can cap.

I can't find the can as an assembly so I'm going to replace the individual caps.

Here are the ratings for the caps in the can:

60uf 400v
40uf 400v
40uf 350v
50uf 300v

Can I replace them with these? What would the difference be, if any?

68uf 450v
47uf 450v <----i can double either one of these instead?
39uf 400v <----i can double either one of these instead?
56uf 400v

Here's the Can Cap on the schematic C3 A, B, C, and D.

http://i677.photobucket.com/albums/v...ax7/CanCap.jpg

Thanks!
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Old 19th August 2012, 12:28 AM   #2
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Because you have a 5Y3 rectifier were it me I would probably use the following individual caps:

56uF/400V
47uF/400V
47uF/400V
56uF/400V

All of these could be 450V as well.

Given the compact size of modern capacitors you might be able to fit these inside the original can and retain the original appearance of the amplifier chassis, baring this you can mount them underneath the chassis making sure to disconnect the old cap.
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Old 19th August 2012, 12:41 AM   #3
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I do plan on putting them in the existing can. I am familiar and proficient with soldering as I work on car electrical systems for a living but I am new to electronic audio capacitors so I want to make sure I am using the correct parts. Thanks for the input!
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Old 19th August 2012, 12:49 AM   #4
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Have fun! Make sure that you use good insulation on the cap leads like teflon tubing and heat shrink tubing as it will be tight in there with caps and wires.
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Old 19th August 2012, 12:56 AM   #5
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I've used some heat shrink on the leads for the other electrolytics in the amp already. It's serves the purpose great!

I haven't replaced any of the disc capacitors or the resistors but it is sounding better already.

First up, I'm going to replace the can caps and then any electrolytics or paper caps in the tuner(which I have not examined yet). I've only had this console about3 weeks so it is a work in progress.
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Old 28th August 2012, 01:16 AM   #6
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Got all the caps and resistors I'm going to replace on order. The only one I couldn't find was an electrolytic rated 8uf 50v. It's in the upper right corner of this pic:

http://i677.photobucket.com/albums/v...827_195245.jpg

Here are some other pics of the schematic if needed for reference.
http://i677.photobucket.com/albums/v...827_195255.jpg
http://i677.photobucket.com/albums/v...827_195304.jpg
http://i677.photobucket.com/albums/v...827_195312.jpg

It's the brown cap in this pic:
http://i677.photobucket.com/albums/v...822_200606.jpg

I am guessing I could replace this with a 8uf 100v and everything is ok?
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Old 28th August 2012, 04:01 PM   #7
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Try two 4.7's instead. Doubling the voltage can cause problems in certain circuits
should be about 9.4 mics total capacitance, when wired in paralel should be just right!
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Old 28th August 2012, 04:17 PM   #8
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500D805G025BA2A Vishay/Sprague | Mouser

The voltage across that 8uF capacitor is less than 2V typically so any part with at least a 6.3V rating is going to work just fine.. The part above should do the job nicely.
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Old 29th August 2012, 12:52 AM   #9
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I've been worried about stepping the voltage down since most websites I have referenced mentioned only using equal voltage or higher.

That, however, is exactly why I asked here!
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