[Collins] In Need Of ..

[Dr. Gerald N. Johnson]

On Tue, 2007-06-12 at 07:36 -0400, Stuart Martin wrote:
> If that cap isn't dried out, the leak can be stopped. I used a soldering
> iron and resealed the top crimp with solder. If the ceramic insulator is
> leaking, tighten it them. Try not to breath the fumes.

Fumes of pyranol have never hurt anyone. Drinking it is hard on bodies.
For decades factory workers worked with arms and hands immersed in the
stuff. But don't ingest the liquid. There are other chlorinated
biphenyls that are more hazardous but all get marked with the same brush
as bad.

> The cap read 150 nf
> on my Fluke 110. Yes, it does work.

Air in the places where oil should be can lead to voltage breakdown of
the air and the arc terminating at the oil surface will make carbon of
the oil. Checking the value of capacitance is not a sufficient test for
such a high voltage capacitor. It needs to be tested for arcing at rated
voltage.
> 
> New "Plastic" replacements can be bought in quantities of 100 from Plastic
> Capacitors Inc., but they will require different mounting holes. PC will
> provide mechanical drawings, but I never pursued the issue after the solder
> fix.
> 
> Stu, k2qde
> 
The 0.15 mf tunes the plate filter choke to 120 Hz for better rejection.

-- 
73, Jerry, K0CQ, Technical Advisor to the CRA
All content copyright Dr. Gerald N. Johnson, electrical engineer