Capacitor Substitution - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 7th July 2012, 07:04 AM   #1
diyAudio Member
 
Join Date: Sep 2010
Default Capacitor Substitution

Howdy folks,
Quick question...

I have an el cheapo Chinese made "Vox" 4 watt guitar amp and am adding a Mercury Magnetics I/O trans, choke and component/circuit mod upgrade.

Thinking of upgrading the electrolytic caps, to something that might be quieter and a bit more hifi, and also dry for long term lower maint.

Any thoughts on compounds i.e., tantalum, PTFE etc?

Thank you,

John
  Reply With Quote
Old 7th July 2012, 07:11 AM   #2
diyAudio Member
 
Join Date: Aug 2010
Location: Near Eindhoven, the sanctum of the pentode. and among that other things.
Send a message via Skype™ to v4lve lover
any good quality electrolytics from a major western manufacturer will do. audiophile grade is just plain BS go for a 105 degree C . if you feel that you must.

either way a crappy unit is still a crappy unit you can only try to make it Less crappy. the critical parts are OPT´s and circuit topology.


V4lve
  Reply With Quote
Old 7th July 2012, 07:59 AM   #3
diyAudio Member
 
Join Date: Mar 2007
Quote:
Originally Posted by v4lve lover View Post
any good quality electrolytics from a major western manufacturer will do. audiophile grade is just plain BS go for a 105 degree C . if you feel that you must.

either way a crappy unit is still a crappy unit you can only try to make it Less crappy. the critical parts are OPT´s and circuit topology.


V4lve
Agree !
  Reply With Quote
Old 7th July 2012, 11:03 AM   #4
12E1 is offline 12E1  United Kingdom
diyAudio Member
 
12E1's Avatar
 
Join Date: May 2012
Location: Near Huntingdon, Cambridgeshire, UK
I would always go for 105 degrees C over lower ratings. The spec is not just about the working temperature - it is to do with the ability of the part to operate over time at any elevated temperature. Thus a 105 degree part running at 50 degrees will have a much longer life than a 85 degree part run at 50 degrees. Major eastern (esp. Japanese) manufacturers are also good.
  Reply With Quote
Old 7th July 2012, 06:26 PM   #5
tomchr is offline tomchr  United States
diyAudio Member
 
tomchr's Avatar
 
Join Date: Feb 2009
Location: Greater Seattle Area
Quote:
Originally Posted by 12E1 View Post
I would always go for 105 degrees C over lower ratings. The spec is not just about the working temperature - it is to do with the ability of the part to operate over time at any elevated temperature. Thus a 105 degree part running at 50 degrees will have a much longer life than a 85 degree part run at 50 degrees. Major eastern (esp. Japanese) manufacturers are also good.
Yep!! Nichicon makes good caps. I like their Muze KZ series for the (very few) electrolytics I use in the signal path. For lower value caps, I tend to stick with polypropylene caps.

Just buy the caps from a reputable supplier like Digikey, Newark, Farnell, etc. The eBay specials are usually not worth it.

~Tom
__________________
21st Century Maida Regulator, Universal Filament Regulator, Damn Good 300B, Novar Spud, and more...
Neurochrome : : Audio - http://www.neurochrome.com/audio - Engineering : : Done : : Right
  Reply With Quote
Old 7th July 2012, 06:31 PM   #6
diyAudio Member
 
Join Date: Feb 2005
Location: S.England
Rubycon ZL series for me! (as well as Nichicons).

my 2p's.
  Reply With Quote
Old 7th July 2012, 11:04 PM   #7
diyAudio Member
 
Join Date: Sep 2010
Thanks folks!

Those are the brands I typically use, as well as Hitichi in the past and I like WIMA in the microphones and mic pres etc.

I will check the ratings on the parts and the brand parts as well, they are certainly cheap enough.

Digikey are my main supplier, but that's where I got into trouble in the first place...

So many kinds of nice parts, like a candy store, lol *embarrassed*

thanks again,

John
  Reply With Quote
Old 8th July 2012, 03:35 AM   #8
data is offline data  Australia
Account disabled at member's request
 
Join Date: Jul 2007
Location: Brisbane
For those that think hi end caps are BS, well...you probably have never heard a decent cap (Mundorf or Jensen) from the sounds of it.....(talking power caps here)

To the OP question, if you are referring to power caps, seeing It's a guitar amp maybe F&T is worth a look in, these are not a so called "audiophile cap" just a very good cap.

For the signal path film/foil caps where possible, again you don't need to go crazy, the older type Hovland Musicaps are nice and don't cost a fortune, and the Obligatto MPK's are very affordable and have nice dynamics.

Edit:At the end of the day you want parts with sound signatures that complement each other, just like you match source > amps and speakers for best sound, It's a similar deal with component parts, doesn't matter if they are cheap or expensive, the same matching is needed for the sound you are looking for.

Bet I get flamed by some here for the above, but that's sweet

Last edited by data; 8th July 2012 at 03:40 AM.
  Reply With Quote
Old 8th July 2012, 05:42 AM   #9
TheGimp is offline TheGimp  United States
diyAudio Member
 
TheGimp's Avatar
 
Join Date: Aug 2009
Location: Johnson City, TN
Dude, it's a guitar amp.
  Reply With Quote
Old 8th July 2012, 06:11 AM   #10
data is offline data  Australia
Account disabled at member's request
 
Join Date: Jul 2007
Location: Brisbane
Yes it is, I even mentioned that in my post.

And I never recommended any so called "audiophile" caps, so I don't know what you are trying to point out?

When It's not a guitar amp I'll be mentioning names like Deulund unless they have defined a restrictive budget
  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
AR3a Capacitor needs substitution? Help me thermen Multi-Way 6 2nd July 2014 12:41 PM
Capacitor Substitution d5post Parts 7 3rd May 2009 12:59 PM
E182CC substitution ? bembel Tubes / Valves 5 11th November 2006 04:11 PM
Capacitor Substitution and my Junkbox BOZ Arx Pass Labs 1 18th September 2003 01:29 PM
Mosfet substitution??? JBL Solid State 0 8th May 2002 11:50 PM


New To Site? Need Help?

All times are GMT. The time now is 04:49 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