Dennis Thanks for your posting on the cap testing. I have no idea what my older C-3 does for leakage tests but I found this interesting paper on it...
http://www.kb2ljj.com/Manuals/37-Heath%20Kit/Heathkit%20C-3%20%5Bnotes%5D%20WW.pdf It sounds like the C3 is supposedly set for 4.5 ma I may try the restoration that is suggested in the paper... Several more new caps on order for the R4B. I replaced the bias filter cap for the AVC/Mute circuit that had excessive leakage and it fixed it fine. The C-3 did show leakage but I am still learning how to use it and a more sensitive leakage test would be useful for audio coupling caps. It sounds like the sensitivity of the C-3 meter could be increased with use of the notes by w7EKB Paul K3PG http://pgerhardt.blogspot.com Message: 4 Date: Sun, 3 Apr 2011 11:31:24 -0700 From: Dennis Monticelli <dennis.montice...@gmail.com> To: Richard Knoppow <1oldle...@ix.netcom.com> Cc: drakelist@zerobeat.net Subject: Re: [Drakelist] Testing Caps for Leakage Message-ID: <BANLkTi=34a_6copu05uz7r4m4vrzr8x...@mail.gmail.com> Content-Type: text/plain; charset="iso-8859-1" Richard, Any readily detectable leakage is too much for a grid coupling cap IMO. A cap that even partially closes the eye on the 1uA setting of my Heathkit is grounds for replacement. Modern caps are cheap and easy to obtain. If you don't like the bright colors of new axial caps, just slip a little heat shrink over them and "viola" you have a mini black beauty :-) Dennis AE6C _______________________________________________ Drakelist mailing list Drakelist@zerobeat.net http://mailman.zerobeat.net/mailman/listinfo/drakelist
