[BC] Harris SX-1A NRSC woes...

[Milton R. Holladay Jr.]

I was just working on an early SX-1A that suddenly had a case of the
can't-help-its ( no output, 64% drive, pinned voltage meter, &c.) After
shutdown, when powered back up it blew the big fuse that's sorta hidden down
in the corner and the TIP125 on the AC controller . Harris could find no
copy of the power supply diagram that agreed with what was present.
In the process of troubleshooting, I checked the ripple on the big blues and
all were fine--and original. It measures fine every year, too.. An exception
to prove the rule, perhaps?
M
----- Original Message -----
From: <WBRadiolists at aol.com>


> In a message dated 09/03/2008 3:28:50 PM Eastern Daylight Time,
> tosenkowsky at prodigy.net writes:
>
> > The caps in question are the large blue canister
> >  ones behind the PDM amps. Remove them, shake
> >  and listen for a sloshing sound. Replace all of
> >  them if you hear any slosh. Proper drive from
> >  the Osc card and IPA are also important. Be
> >  absoutely certain the mechanical connections to
> >  these caps and the ground are tight and clean.