[time-nuts] AN/URQ-13 FE-15a oscillator question

[paul swed]

OK I have had several responses and 110F is low as I expected.
Wonder if I am being faked out? Perhaps by an inner oven and I am only
reading the outside of the outer oven. The Older URQ10 and newer URQ23 do
have 2 ovens. The meter switch for test is only labeled 1-9. no other clues
to the function. I noticed 2 positions change with warm up. Sort of
supports the 2 oven theory.
Really do not want to take what might be the outer oven off to put the
probe in.
Thanks everyone.
Paul
WB8TSL

On Thu, Feb 11, 2021 at 5:32 PM Bob kb8tq <kb8tq at n1k.org> wrote:

> Hi
>
> 110 F makes very little sense unless you are in a very cold climate.
> For military gear (or any gear for that matter) 43C on the oven just
> doesn’t work.
>
> 110 C would make sense in a very high temperature environment.
> (think of 85C upper end ….).
>
> Bob
>
> > On Feb 11, 2021, at 2:18 PM, paul swed <paulswedb at gmail.com> wrote:
> >
> > Hello to the group.
> > I have had a AN/URQ-13 or FE-15a oven oscillator for years.
> > Its never worked correctly and in reality some early alpha build. (Funny
> > that its labeled 15a)
> > Looking online there is no documentation that I have been able to find
> over
> > the years.
> > However in another discussion on a AN/URQ-23 that does have a manual and
> > schematics I realized my guesses on power could be totally wrong. Using
> > voltages like the URQ23 the URQ13 actually behaves fairly well. I was
> lucky
> > that I didn't destroy something with my original guess.
> > That said what I find odd is the internal crystal oven runs at exactly
> 110
> > degrees. Its repeatably warms to that level with a range of supply from
> +/-
> > 12-15V.
> > Does 110 degrees F make any sense at all?
> > Thank you
> > Paul
> > WB8TSL
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