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Posted on January 7, 2014 at 08:34:14

dwim1029
Audiophile

Posts: 18
Location: GA
Joined: December 20, 2013

I know it is important to match up capacity, voltage, and polarity... but how much difference does it make between 'grades' of capacitors? For example, Nichicon caps for my receiver seem to range from about $0.20 to about $1.50 each, depending on which class i buy (Muse being highest). It doesn't seem like much, but when you have 80 caps to replace, it starts to add up. Thoughts?

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RE: capacitors

airtime

08:59:01 01/07/14

5

RE: capacitors

airtime

14:29:23 01/07/14

2

Updated Nichcon chart

airtime

08:09:47 07/19/16

...

Show full thread outline!

RE: capacitors

airtime

08:59:01 01/07/14

5

RE: capacitors

airtime

14:29:23 01/07/14

2

Updated Nichcon chart

airtime

08:09:47 07/19/16

RE: capacitors

dwim1029

15:16:38 01/07/14

RE: capacitors

dwim1029

10:34:27 01/07/14

RE: capacitors

petercapo

14:02:03 01/07/14

RE: capacitors, posted on January 7, 2014 at 08:59:01
airtime Audiophile Posts: 11287 Location: Arizona Joined: February 4, 2003	Did you spray all the controls with DeOxit? Before you start, do that first. Is it still having the same problems? FIST do a visual inspection for burnt resistors and capacitors that look puffy or funny looking. Post your findings. charles

RE: capacitors, posted on January 7, 2014 at 10:34:27
dwim1029 Audiophile Posts: 18 Location: GA Joined: December 20, 2013	Charles, The local guy I was working with came back to me with a better price point to re-cap, fix any cold solder joints, replace bulbs, and fix any minor issues. I am going to let him do that part. He just offered me 3 levels of caps from Nichicon & I am trying to determine if there is a tangible difference between them, and what that difference may be. Thanks!

RE: capacitors, posted on January 7, 2014 at 14:02:03

petercapo
Audiophile

Posts: 665
Joined: December 29, 2012

Look up the datasheets - some may be low impedance/low ESR, etc., while others are not. Also check the physical dimensions for the given value and rating. Some series are larger or smaller for the same value, and because of space accommodations, it might affect the cost. That is, they might all fit just fine, but some series are smaller space-savers, which could mean a higher (or lower) price. Also look at temperature rating, and the life expectancy in hours should be indicated on the datasheet.

If you can get the exact model/series numbers of the options he is offering, you might be able to get online and find the datasheets. Start at mouser.com or digikey.com.

RE: capacitors, posted on January 7, 2014 at 14:29:23

airtime
Audiophile

Posts: 11287
Location: Arizona
Joined: February 4, 2003

Different types of caps are used for different applications. Some caps are power supply, filtering, bypassing and even in the audio signal chain.

You should have an idea what the cap is used for, and replace it with an appropriate type. Not just using one brand or type universally - big mistake.

I would have your tech clean it and just get it up and running. Don't have him rebuild it. Just fix it! Leave the rebuilding to the vintage pros.

BTW did this ever play music? What the noise both channels? Or just one channel?

charles

Nichicon flow chart

RE: capacitors, posted on January 7, 2014 at 15:16:38

dwim1029
Audiophile

Posts: 18
Location: GA
Joined: December 20, 2013

Charles,
I took the unit to my guy today. He pretty much said the same thing you said re: the right cap for the right spot. I misunderstood his earlier message regarding levels of caps...

As far as it's condition... I played a cassette on the unit, through the AUX 1 input. The Balance, Bass and Treble controls seem to work fine.
Several lamps are out.
There are some noticeable pops & clicks when adjusting controls. Also, the speakers go in & out if you nudge the unit… fiddling with the speaker cables where they attach to the receiver corrects the problem, but there is evidently something not 100% there.
I tried playing a record through the Phono 1 input, but the volume was nowhere near as loud as what I got through the AUX 1 input with a cassette. Although, now that I think about it that could be related to the aforementioned speaker connection issue.
A couple of the caps look swollen to me, and a few of the resistors look discolored.
And of course, it is dirty in there! Seriously, what do you guys use to clean off the greasy dust that accumulates?

Updated Nichcon chart, posted on July 19, 2016 at 08:09:47

airtime
Audiophile

Posts: 11287
Location: Arizona
Joined: February 4, 2003

.

http://www.mouser.com/new/nichicon/Nichicon-Audio-Caps/

Vintage Asylum

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