[Test-Equipment] Old Jackson tube tester

[WA5CAB--- via Test-Equipment]

The I-177, I-177-A and I-177-B each contain four capacitors, three each 500 
or 510 mmf micas and one 0.1 uf paper.  I would probably check the paper 
one but it is in the Shorts test circuit and wouldn't smoke the transformer at 
turn-on.

Robert Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480

In a message dated 06/16/2015 09:54:18 AM Central Daylight Time, 
dmj.mantor at gmail.com writes: 
> I just purchased an I-177 military Hickok.
> It is in beautiful shape and doesn't look like it's been used much.
> Dave w9ocm
> On Jun 16, 2015 10:32 AM, "Brian Burns" <brian at lessonsinlutherie.com> 
> wrote:
> 
> >Hello Miles,
> >
> >Thanks for the response!
> >
> >~ The lack of electrolytic capacitors is no surprise.
> >
> >~ You won't find them in a Hickok or a TV-* either, except to damp the
> >panel
> >meter.
> >
> >~ The Hickok design is a bridge circuit that uses ac throughout.
> >
> >Well it sure was a surprise to me! I assumed that it had to have clean 
> high
> >voltage DC to do an accurate test. Thanks very much for setting me 
> straight
> >on this (:->)...
> >
> >So, I'm safe to bring it up to 110-115 volts line current, check for 
> smoke,
> >and put it into service?
> >
> >Cheers,
> >
> >Brian