[Milsurplus] ID these crystals?

[John Franke]

Very true, I was just keying on the phrase "radio altimeter."

John WA4WDL

----- Original Message ----- 
From: "J Forster" <jfor at quik.com>
To: "John Franke" <jmfranke at cox.net>
Cc: "Hue Miller" <kargo_cult at msn.com>; <milsurplus at mailman.qth.net>
Sent: Thursday, October 18, 2007 8:47 PM
Subject: Re: [Milsurplus] ID these crystals?


> They are very different designs. The APN-1 uses a triangle modulated CW FM
> technique, the SCR-718C is pulsed time-of-flight
>
> -John
>
>
>
> John Franke wrote:
>
>> The SCR-718C radio altimeter  timing oscillator uses a crystal for 98.356
>> kHz.
>> John WA4WDL
>> ----- Original Message -----
>> From: "J Forster" <jfor at quik.com>
>> To: "Hue Miller" <kargo_cult at msn.com>
>> Cc: <milsurplus at mailman.qth.net>
>> Sent: Thursday, October 18, 2007 7:43 PM
>> Subject: Re: [Milsurplus] ID these crystals?
>>
>> >
>> >
>> > Hue Miller wrote:
>> >
>> >> PS- i also have one of those 83 or so kHz crystals from an APN-1 or
>> >> something
>> >> like that. Doubles into LF experimenter band, i think. Free if this is
>> >> a project of
>> >> yours.
>> >
>> > There are no crystals in the APN-1 or ARN-1.
>> >
>> > -John
>
>