100uF 20V Wet Tantalum Substitute?
I acquired an HP1740A scope and all is well except this one capacitor described as 100uF 20V +/- 10% wet tantalum which has leaked and the electrolyte crystallized located on the timebase board. Do I need to replace it exactly or is there a newer type of capacitor that can be used as a substitute with better than or equal to characteristics of a wet tantalum? I looked around and the wet tantalums are very pricey. I know capacitor technology has come a long way and maybe someone can help save me the research. Thank You, Bill _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
Bill Karkula wrote:
I acquired an HP1740A scope and all is well except this one capacitor described as 100uF 20V +/- 10% wet tantalum which has leaked and the electrolyte crystallized located on the timebase board. Do I need to replace it exactly or is there a newer type of capacitor that can be used as a substitute with better than or equal to characteristics of a wet tantalum? I looked around and the wet tantalums are very pricey. I know capacitor technology has come a long way and maybe someone can help save me the research.
Thank You,
Bill
_ Hi Bill,
I found good info on Tantalum capacitors here: http://www.radio-electronics.com/info/data/capacitor/tantalum-capacitor.php You can then decide where you want to go with replacing the rascal! John :-#)# -- John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9 Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, VideoGames) www.flippers.com "Old pinballers never die, they just flip out" _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
There should be no problem using a regular tantalum there. One little known factoid about HP test equipment is that it is mostly designed to military specifications. As the story goes, if the military orders a military version of a piece of test equipment about the only thing that changes is the paint color. So they may have used the wet tantalum for that reason, or maybe it was the more common part back when this was made. Wet tantalums aren't used as much these days, if for no other reason than the "wet" part that leaks can cause a lot of damage. Bill Karkula wrote:
I acquired an HP1740A scope and all is well except this one capacitor described as 100uF 20V +/- 10% wet tantalum which has leaked and the electrolyte crystallized located on the timebase board. Do I need to replace it exactly or is there a newer type of capacitor that can be used as a substitute with better than or equal to characteristics of a wet tantalum? I looked around and the wet tantalums are very pricey. I know capacitor technology has come a long way and maybe someone can help save me the research.
Thank You,
Bill
_______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
_______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
CRC has graciously offered one to me for the postage and I have emailed him back with my mailing address and a big thank you. I was really impressed - The outside was dusty but the inside was immaculate like the day it left the factory. It's big and heavy but will fit on my scope cart. A quick check and other than the timebase range problem due to that cap, the accuracy was almost factory perfect as well with strong sync. It also has the multimeter option on the cover - an added plus. It looks like all it needs is a good external cleaning and this cap replaced and I am good to go. I'm not worried about leakage - if the replacement lasts half as long as the original one did, I'll be in great shape. Bill -----Original Message----- From: techtoolslist-bounces@flippers.com [mailto:techtoolslist-bounces@flippers.com] On Behalf Of Rodger Boots Sent: Monday, April 27, 2009 6:19 PM To: Technical Tools Mail List Subject: Re: [Techtoolslist] 100uF 20V Wet Tantalum Substitute? There should be no problem using a regular tantalum there. One little known factoid about HP test equipment is that it is mostly designed to military specifications. As the story goes, if the military orders a military version of a piece of test equipment about the only thing that changes is the paint color. So they may have used the wet tantalum for that reason, or maybe it was the more common part back when this was made. Wet tantalums aren't used as much these days, if for no other reason than the "wet" part that leaks can cause a lot of damage. Bill Karkula wrote:
I acquired an HP1740A scope and all is well except this one capacitor described as 100uF 20V +/- 10% wet tantalum which has leaked and the electrolyte crystallized located on the timebase board. Do I need to replace it exactly or is there a newer type of capacitor that can be used as a substitute with better than or equal to characteristics of a wet tantalum? I looked around and the wet tantalums are very pricey. I know capacitor technology has come a long way and maybe someone can help save me the research.
Thank You,
Bill
_______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
_______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/ _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com http://seven.pairlist.net/mailman/listinfo/techtoolslist FTP site is: ftp://ftp.flippers.com/TTL/TestEquipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/
participants (3)
-
Bill Karkula -
John Robertson -
Rodger Boots