Replace Shoei capacitors? - diyAudio
Go Back   Home > Forums > Design & Build > Parts

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 20th April 2012, 02:03 PM   #1
diyAudio Member
 
Join Date: Oct 2009
Default Replace Shoei capacitors?

I'm currently upgrading/modding my nakamichi ec100 active crossover and separate power supply.

It has light blue "shoei" caps in both the crossover and the power supply but I cant find any info on the net about them.

I want to upgrade them if they are not very good but unsure to what?

Anyone have any info on this brand?
  Reply With Quote
Old 20th April 2012, 02:15 PM   #2
diyAudio Member
 
Join Date: Mar 2007
Location: Canandaigua, NY USA
There's this constant desire to recap things and "upgrade" caps, with no real info on what's already in there. My advice is to measure what you've already got- value and loss, before lifting pads and traces and generally downgrading the whole unit. You can either buy a digital cap meter with loss (not that cheap) or build a simple bridge from a few parts (pdf on my site), or at the very least, buy or build an esr meter. That will only give you half the information, but probably the more important half, and you could combine it with any cheap DVM having a capacitance function. Without some actual data, one is just flailing in the darkness!

BTW, even if you had a datasheet, capacitors typically exceed their datasheet specs by so much that comparing paperwork doesn't tell you a lot.
__________________
I may be barking up the wrong tree, but at least I'm barking!

Last edited by Conrad Hoffman; 20th April 2012 at 02:18 PM.
  Reply With Quote
Old 20th April 2012, 03:30 PM   #3
diyAudio Member
 
Join Date: Oct 2009
Thanks for that.
I was hoping someone might know at least what league this brand of caps are in?
  Reply With Quote
Old 20th April 2012, 03:47 PM   #4
ide2003 is offline ide2003  Indonesia
diyAudio Member
 
Join Date: Oct 2008
Location: Jakarta
Hi, that light blue shoei solved hum problem in my dac dht tube out heater (1.25V), in my case 1uF/100V. put there before cerafine, mkt, mkp to no avail. I should bought more of them.
What league? I don't know, saw several of them in old (japan made) sony car amps, good enough I guess. (the ones near trim pot)

best, TeguhPS
Attached Images
File Type: jpg tda1541_dht_tube_out.jpg (59.3 KB, 79 views)
  Reply With Quote
Old 20th April 2012, 04:05 PM   #5
diyAudio Member
 
Join Date: Oct 2009
Yes, the light blue ones at the bottom of your pic are the same ones I'm talking about
  Reply With Quote
Old 20th April 2012, 04:25 PM   #6
ide2003 is offline ide2003  Indonesia
diyAudio Member
 
Join Date: Oct 2008
Location: Jakarta
I see, many times 'logic' of using better part does not guarantee better result, although I might consider replacing these shoei in crossover/ signal path with film caps
  Reply With Quote
Old 20th April 2012, 04:49 PM   #7
diyAudio Member
 
Join Date: Mar 2012
Forget the brand, if it's functioning, not bulging and passes an ESR test then it's what it was supposed to be. Nak does not generally suck.

Like ide2003, I am happy to replace the small lytics you find in the signal path with film. Modern cap construction and the economics of DIY electronics doesn't leave much excuse for things like 0.47uF electrolytic coupling caps.

Mostly, subbing in audiophile approved brands just because doesn't help much.
  Reply With Quote
Old 20th April 2012, 04:52 PM   #8
diyAudio Member
 
Join Date: Nov 2008
Location: Oakmont PA
They are much better than average!
  Reply With Quote
Old 21st April 2012, 12:39 PM   #9
diyAudio Member
 
Join Date: Oct 2009
Quote:
Originally Posted by simon7000 View Post
They are much better than average!
Thanks, care to expand on that?
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Replace / remove couple capacitors in Teufel decoderstation 3 maikel Analog Line Level 6 23rd May 2014 02:49 PM
Which capacitors should I replace? davidzhou Tubes / Valves 30 10th June 2010 05:42 PM
How can I understand if it is time to replace capacitors? beppe61 Parts 51 28th November 2005 11:00 AM
capacitors: panasonic FC vs elna RJH vs rubycon ZA capacitors costiss Parts 11 30th January 2003 10:32 PM
differences between computer grade capacitors and small can capacitors LBHajdu Pass Labs 0 22nd February 2002 02:29 AM


New To Site? Need Help?

All times are GMT. The time now is 03:15 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2