[R-390] Capacitor tester...

[jrfke5ri at aol.com]

IO have been using a Sprague Tel-Ohmike Capacitor Analyzer, model TO-6A for many years. I like the fact that it can also be used to see if electrolytics can be "SALVAGED".   I disconnect one side and slowly raise the applied voltage keeping the current within reason.  If I can reach the specified voltage and have leakage current also within spec, I feel fairly safe in keeping the old capacitor. This is also an excellent way to safely "re-form" them.
73,
John
KE5RI  (>50 than fifty years of tube experience).   


-----Original Message-----
From: Don Cunningham <donc at martineer.net>
To: John Saxon <johnbsaxon at yahoo.com>; r-390 <r-390 at mailman.qth.net>
Sent: Tue, Mar 6, 2012 7:14 pm
Subject: Re: [R-390] Capacitor tester...


John,
At the advice of a good friend, I built a capaciter ESR checker from a kit 
available several years ago.  I got mine from Dick Smith Electronics (DSE, I 
believe at the time), but can no longer find that.  It will read the ESR of 
a capacitor in or out of the circuit which is a real plus for checking these 
old rigs.  I sure wish I had bought two of the kits while they were 
available, as the commercial ones I see for sale are VERY pricey!!!  If you 
can find one of these that someone built and never used, or even an unbuilt 
kit, I highly recommend the use of those.
73,
Don, WB5HAK 

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