I bought one of those ESR testers some time ago. It works very well. It is from Russia, but ordering from Brooke is much easier :-)
Joe Gray W5JG On Mon, Nov 10, 2014 at 6:51 PM, Brooke Clarke <[email protected]> wrote: > Hi Perry: > > (shameless plug) Have you measured the tantalum caps? > I sell a combined ESR & Capacity meter that does in circuit tests on > powered down circuits. > http://www.prc68.com/P/Prod.html#ESR > > For an example of it's use on a Heathkit GC-1000 WWV clock see: > http://www.prc68.com/I/HeathkitGC1000.shtml#Rx and scroll down for more > boards. > > Notice that sometimes the ESR is high and other times the capacitance is > low for the bad caps. > The tantalum caps were OK, but almost all the electrolytic caps were bad. > > Mail_Attachment -- > Have Fun, > > Brooke Clarke > http://www.PRC68.com > http://www.end2partygovernment.com/2012Issues.html > http://www.prc68.com/I/DietNutrition.html > Perry Sandeen via time-nuts wrote: > >> List, >> OK everybody, let's not get our pacemakers wound up<G> >> The problem. (Long Intro) >> I have about 15 pieces or so of older HP test equipment. >> 3586B, 5370B, 5335A to name a few. Because of their age of 20+ years a >> few have failed and need repair. I >> have decided to go on a wholesale electrolytic capacitor replacement on >> all of >> them. (Mouser will be able to declare an extra dividend) >> For all the *standard* types I've chosen mostly Panasonic >> 105C 10,000 hour caps. So far, so good. >> Now I come to the issue of the wet-slug tantalums that were >> used. At the time of manufacture, these >> were the best and most expensive low voltage electrolytics available. >> The question is: can one replace the tantalums with the high >> grade (105C) Panasonic or Nichicon capacitors with an equal or higher >> capacitance value? >> Even using the *tear drop* new replacements one is looking >> at very heavy $$$. >> Regards, >> Perrier >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to https://www.febo.com/cgi-bin/ >> mailman/listinfo/time-nuts >> and follow the instructions there. >> >> > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to https://www.febo.com/cgi-bin/ > mailman/listinfo/time-nuts > and follow the instructions there. > > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
