[Amps] Capacitor and Alpha 374 question

[Ron Youvan]

   Hi  Paul W9AC Christensen:

/* snip */
> I ordered one last week (P/N MOC5M35ES) for an Alpha PA-70A that was
> manufactured in 1970 (S/N 002).  The new cap is 35uF/5KV and fits inside the
> 70A, 70V, 77, 77D, 77Dx, and 77Sx.  Price was $450.  Yep, a helluva' lot
> more than a string of Mil-Spec 'lytics and equalizing resistors.  Looks like
> it's the same cap for the 374 , but if not, they can manufacture it for
> folks who want originality over cost/performance of top-grade 'lytics.

   Electrolytic capacitors have a predicted life expectancy, oil filled
paper capacitors do not.  I have serviced industrial equipment made in
1949 and the  oil filled paper capacitors measured spot on and didn't
leak.  (oil or electrons)  (10 kV and above units)
   I also dealt with many 4 uFd at 40 kV and a new one leaked oil at one
bushing, replaced in warranty, all others performed for 23 years before
the unit was replaced.
-- 
   Ron  KA4INM - Youvan's corollary:
                 Every action results in unwanted side effects.