[Milsurplus] I-177B tube tester

[Moe Fretz]

If Hickok designed this unit to work and survive the last 50 years
with tube rectifiers. Why would you want to change it?

On 10/25/08, John Hutchins <olegerityincj at austin.rr.com> wrote:
> Group -
> While I am in the unit replacing 3 carbon comp resistors an 3 caps. I am
> thinking about replacing the tube rectifiers with silicon to reduce the
> heat in the unit.
> Adding zeiners to compensate for the increased voltage.  Looking at the
> schematic looks as though the unregulated DC has a bunch of AC riding on
> top which may be required to perform an accurate tube test.  Would
> adding the zeiners  degrade or change the  functionality, performance of
> the unit if the measured DC values were met?
> -> insert response <-
> Have made multiple DC voltage measurements around the rectifiers to
> benchmark the existing potentials.   Used a 30Kohm volt meter.
>
> Thanks
> Hutch
>
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-- 
Moe Fretz
Collection and Preservation
Of Canadian Tube Radios,
Communication Equipment,
Vintage Ham gear and Military Radios.

Don't crush them ---- Restore them.


Ontario Canada