[MRCA] Recrystalling a TBX-8

[Rob Flory]

Hi Garret,
Doesn't the TBX-8 have a 2-tube transmitter, unlike the earlier models with
the single 837?  The characteristics would be quite different.
I never really found any advantage to operating the earlier TBX on crystal
control.
Rob

On Mon, Mar 13, 2017 at 12:15 AM, Garret Scott <scottgs at bellsouth.net>
wrote:

> Hi Al,
>
> Yes, those crystals are really scary. They would seem more appropriate in
> Frankenstein's lab than a portable radio.
>
> Thanks for the input.  That's exactly what I was thinking about.  I don't
> want to destroy perfectly good (and soon to be rare) 80m ham band crystals.
>
> Garret
> W8BUG
>
>
>
> -----Original Message-----
> From: MRCA [mailto:mrca-bounces at mailman.qth.net] On Behalf Of Al Klase
> Sent: Sunday, March 12, 2017 8:13 PM
> To: Military Radio Collectors Association
> Subject: Re: [MRCA] Recrystalling a TBX-8
>
> Hello Garret,
>
> I played with one of those years ago, and was kind of freaked out by the
> crystals, they're big, and appear to be heat sinked to the chassis.
> Fearing that it might be the kind of oscillator that breaks crystals,  I
> installed a # 49 pilot lamp ( 2 volts, 60 mA) in series with the crystal,
> and used FT-243's without a problem.
>
> YMMV,
> Al
>
> On 3/12/2017 5:52 PM, Garret Scott wrote:
> > With all this crystal talk, I've been prompted to think about crystals
> > for the TBX-8.
> >
> > Any one experienced with this or with those funky giant round
> > CG-40024-A crystal holders which they use?
> >
> > Just wondering if a typical fundamental crystal on 3885 Kcs will go in
> > there and work.
> >
> > Thanks,
> > Garret
> > W8BUG
> > scottgs at bellsouth.net
> >
> >
> >
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> --
> Al Klase - N3FRQ
> Jersey City, NJ
> http://www.skywaves.ar88.net/
>
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