[Milsurplus] Xtal question

[John Franke]

80.86 kHz was used in radar range marker generators.  The period is 12.367 
microseconds which corresponds to time required for a radar signal to go 1 
nautical mile and return.

John  WA4WDL

----- Original Message ----- 
From: <Military1944 at aol.com>
To: <Wireless-Set-No19 at yahoogroups.com>; <milsurplus at mailman.qth.net>
Sent: Saturday, March 29, 2008 9:51 AM
Subject: [Milsurplus] Xtal question


> While searching through my next box of xtals I found these two. Can anyone
> tell me more.
>
> xtal 1
>
> Round stubby case 1.75 inch dia, 1 inch tall, metal outer case, 2 pin 3/4 
> in
> spacing,
> on the side is marked:
> VALPEY CRYSTAL type XLST freq 80.86khz, made in USA, ????Holliston,  Mass.
> On top is the US Navy anchor.
>
> xtal 2
>
> round, 1.5 inch dia,  octal base, 6 pins, marked:
> BENDIX N.Hollywood, Calif. USA Model 3947
> With 3 Channel places on the top of the xtal
>
> I have three of these, all with 4495 engraved in one of the spaces.
>
>
> I'm guessing xtal 1 is out of a rx, which had 80khz if ?? The 3 position
> Bendix might be out of a tx?
> Anyone have any idea.
>
> cheers, Ben G4BXD.
>
>
>
>
>


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