[ARC5] ARC-5 Crystal Question

[Dennis Monticelli]

"KC" clearly stamped in white underneath the 8870.  My particular T-22 has a
Navy release stamp of 1-45 and an Aircraft Radio Corp acceptance stamp of
6-45.

As far as I know all the commercial GDO's simply apply the crystal in lieu
of the plug-in coils so by definition it's operating parallel resonant mode.

On Thu, Aug 12, 2010 at 10:40 PM, Henry Mei'l's <meils at get2net.dk> wrote:

> Hi Dennis,
>
> And what freq. did it oscillate at ;0) - just kidding - but there is a
> slight difference in whether xtals 'swing' in parallel or series mode,
> right?
> If I had a gdo at that time, I might have done the same -- good idea.
> (Just to be trivial: was the xtal marked Kc or kc or just 8870? - we had a
> big discussion on the Radio Officer's reflector about proper abbreviations.
> I could just take a peek into my newly acquired ARC-5s - but this is
> easier.)
>
> 73, Henry OZ1UF
>
> ----- Original Message -----
> From: "Dennis Monticelli" <dennis.monticelli at gmail.com>
> To: "Discussion of AN/ARC-5 military radio equipment."
> <arc5 at mailman.qth.net>
> Cc: <jfor at quik.com>
> Sent: Friday, August 13, 2010 7:00 AM
> Subject: Re: [ARC5] ARC-5 Crystal Question
>
>
> > OK.  Curiosity got the better of me.  After reading the thread again, I
> > pulled the 8870Kc unit out of my T22 and hooked it up to my trusty grid
> > dip
> > meter, which I use as a crystal checker.  It oscillated just fine.
> >
> > Dennis AE6C
> >
> > On Wed, Aug 11, 2010 at 9:35 PM, Henry Mei'l's <meils at get2net.dk> wrote:
> >
> >> I actually did try to get an '8000kc'/kHz  ARC-5 xtal to ocscillate
> >> (Think
> >> I
> >> lashed together a Pierce, (triode/grid-to-plate) breadboard setup). This
> >> xtal didn't oscillate -- but on the other hand I don't recall whether I
> >> ever
> >> tried to use it in its intended function, so it might have been
> >> disfunctional in all respects.
> >> But as Dennis writes, why shouldn't they oscillate?
> >> Easy enought to find out.
> >>
> >> Henry
> >>
> >>
> >> ----- Original Message -----
> >> From: "J. Forster" <jfor at quik.com>
> >> To: <arc5 at mailman.qth.net>; <milsurplus at mailman.qth.net>
> >> Sent: Thursday, August 12, 2010 5:10 AM
> >> Subject: [ARC5] ARC-5 Crystal Question
> >>
> >>
> >> > Out of curiosity, does anybody know if the quartz crystals, used to
> >> > spot
> >> > check the transmitter frequency, will oscillate? In the Tx they are
> >> > only
> >> > used as very narrow band filters.
> >> >
> >> > Thanks,
> >> >
> >> > -John
> >> >
> >> > ===============
> >> >
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