Opinion on those electrolytics needed

Peter Daniel · 24th November 2003, 10:57 PM

I'm in position to buy pretty cheap those caps. How good are they and what are they worth? 01.89 is a production date?

pooge · 25th November 2003, 12:22 AM

Those are pretty old. Might use that as a bargaining chip. Buy more than you need, reform them by charging, test them for leakage, and use the good ones, if the price is right. The article "Picking Capacitors" by Jung and Marsh shows how to test them for leakage. The article is on the net some where. Do a search.

cocolino · 25th November 2003, 01:05 AM

Hi Peter,

Sikorel are the highest grade quality electrolytic caps from Siemens for industrial applications, very low ESR, very high ripple current, high temperature, long-life etc.
Should be excellent for audio power amps!

Very expensive when new - I guess one of them was $30 - $40, maybe even somewhat more.

They`re reputed they can be stored 10 years without degradation of specs!

If I´d buy older surplus electrolytics than those Sikorel - this ones You have are a bit old though - I wouldn`t pay more than maybe max. 2 - 4 $$ per piece in bigger quantities.
If You plan to buy a big lot maybe You can get a few samples first and to check them out before You decide what they are worth finally.

macboy · 25th November 2003, 05:12 PM

Quote:

The article "Picking Capacitors" by Jung and Marsh shows how to test them for leakage. The article is on the net some where

It can be found here.

25th November 2003, 01:05 AM	#3
cocolino diyAudio Member Join Date: May 2002 Location: Bavaria (south of veal sausage equator)	Hi Peter, Sikorel are the highest grade quality electrolytic caps from Siemens for industrial applications, very low ESR, very high ripple current, high temperature, long-life etc. Should be excellent for audio power amps! Very expensive when new - I guess one of them was $30 - $40, maybe even somewhat more. They`re reputed they can be stored 10 years without degradation of specs! If I´d buy older surplus electrolytics than those Sikorel - this ones You have are a bit old though - I wouldn`t pay more than maybe max. 2 - 4 $$ per piece in bigger quantities. If You plan to buy a big lot maybe You can get a few samples first and to check them out before You decide what they are worth finally. __________________ Christoph *STEAL the BEST - INVENT the REST*

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25th November 2003, 12:22 AM	#2
pooge diyAudio Member Join Date: May 2003 Location: Northern Va.	Those are pretty old. Might use that as a bargaining chip. Buy more than you need, reform them by charging, test them for leakage, and use the good ones, if the price is right. The article "Picking Capacitors" by Jung and Marsh shows how to test them for leakage. The article is on the net some where. Do a search.

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