Videokarma.org

Go Back   Videokarma.org TV - Video - Vintage Television & Radio Forums > Vintage TV & Radio Tech Forum

We appreciate your help

in keeping this site going.
Reply
 
Thread Tools Display Modes
  #1  
Old 02-02-2017, 11:54 PM
MadMan's Avatar
MadMan MadMan is offline
The Resident Brony
 
Join Date: Oct 2016
Location: Chicago
Posts: 1,217
Should I replace dry electrolytic capacitors?

(K, technically this is test equipment, but it's in the 'tech' category... idk)

I'm talking about those cardboard-covered electrolytic capacitors. Like these big blue ones in my power supply. The unit works, but it does weird things sometimes, like voltage fluctuations. It also EMP's my usb headphones if I get them too close while turning it on (but that might just be inadequate shielding or something). Just wondering if this type of cap is expected to be bad after 50 years, like waxy paper caps are.





(The next calibration due date is 1968. lol)

While we're on the topic of caps, can anyone answer this?

Last edited by MadMan; 02-02-2017 at 11:57 PM.
Reply With Quote
  #2  
Old 02-03-2017, 07:35 AM
Celt's Avatar
Celt Celt is offline
Peanut Head
 
Join Date: Nov 2002
Location: Paragould, Arkansas
Posts: 1,746
IMO, YES! It won't be that expensive to do....will only take a few minutes and will make the PS way more stable!
__________________

Let me live in the house beside the road and be a friend to man.
Reply With Quote
  #3  
Old 02-03-2017, 10:46 AM
Electronic M's Avatar
Electronic M Electronic M is offline
M is for Memory
 
Join Date: Jan 2011
Location: Pewaukee/Delafield Wi
Posts: 14,758
The non-chassis mount lytics tend to be less reliable than the chassis mount. I've had TVs with a mix and often most of the cans will be good, but the lead/clip mount lytics will be shot.
__________________
Tom C.

Zenith: The quality stays in EVEN after the name falls off!
What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
Reply With Quote
  #4  
Old 02-03-2017, 04:58 PM
Ed in Tx's Avatar
Ed in Tx Ed in Tx is offline
Zenith Walton My 1st TV
 
Join Date: Nov 2008
Location: DFW
Posts: 1,414
A little hard to verify but sure does look like some crappy soldering on those electrolytics. Eico made kits, I wonder if that was a kit someone built?


I took the liberty of enlarging those solder joints I'm questioning...

Attached Images
File Type: jpg eico-badsoldering1.jpg (71.7 KB, 93 views)
Reply With Quote
  #5  
Old 02-03-2017, 06:07 PM
Celt's Avatar
Celt Celt is offline
Peanut Head
 
Join Date: Nov 2002
Location: Paragould, Arkansas
Posts: 1,746
No doubt it was a kit.
__________________

Let me live in the house beside the road and be a friend to man.
Reply With Quote
Audiokarma
  #6  
Old 02-03-2017, 10:09 PM
Olorin67 Olorin67 is offline
VideoKarma Member
 
Join Date: Feb 2014
Location: Milwaukee
Posts: 927
I dont think Ive ever found a cardboard cased electrolytic that was still good. not sure about these blue ones, but the orange ones tend to dry up.
Reply With Quote
  #7  
Old 02-04-2017, 02:11 AM
MadMan's Avatar
MadMan MadMan is offline
The Resident Brony
 
Join Date: Oct 2016
Location: Chicago
Posts: 1,217
Quote:
Originally Posted by Celt View Post
IMO, YES! It won't be that expensive to do....will only take a few minutes and will make the PS way more stable!
Quote:
Originally Posted by Electronic M View Post
The non-chassis mount lytics tend to be less reliable than the chassis mount. I've had TVs with a mix and often most of the cans will be good, but the lead/clip mount lytics will be shot.
Quote:
Originally Posted by Olorin67 View Post
I dont think Ive ever found a cardboard cased electrolytic that was still good. not sure about these blue ones, but the orange ones tend to dry up.
Good to know! I'll recap this thingy then.

Quote:
Originally Posted by Ed in Tx View Post
A little hard to verify but sure does look like some crappy soldering on those electrolytics. Eico made kits, I wonder if that was a kit someone built?
Quote:
Originally Posted by Celt View Post
No doubt it was a kit.
Good eye! They are crappily soldered. But, they are still firmly connected, no cracks. I'll clean it up when I recap. But you know, I don't think it was a kit. It has a stamp on the inside of the case from quality control, says 'TESTED' and the date June 1965.
Reply With Quote
  #8  
Old 06-15-2017, 11:56 PM
StellarTV's Avatar
StellarTV StellarTV is offline
VideoKarma Member
 
Join Date: Jan 2007
Location: Sacramento, CA
Posts: 503
Depends on the capacitor. The cardboard cased wet electrolytics should be replaced with no question.... those are generally multisectional and have brown epoxy in one end, but the "Dry Electrolytic" capacitors... those do seem to have incredible lifespans. They appear as more contemporary traditional axial leaded electrolytics do, and have a rivet holding each lead on. These will always be labelled as a dry electrolytic if in doubt. I still replace them, but every one I've bothered to test after replacement tested OK.
Reply With Quote
Reply


Thread Tools
Display Modes

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

Forum Jump


All times are GMT -5. The time now is 10:51 AM.



Powered by vBulletin® Version 3.8.4
Copyright ©2000 - 2024, Jelsoft Enterprises Ltd.
©Copyright 2012 VideoKarma.org, All rights reserved.