[Milsurplus] Crystal Curiosity

[B. Smith]

     Not sure of which equipment but the crystals below 500 KHZ could be 
used for alternate injection for Lower Side Band LSB on the PRC-47. I 
usually use a higher frequency crystal (they are cheaper) with a divide 
by 16 IC circuit to produce an output below 500 KHz.  The dial 
calibration will be off but the LSB  audio will be good without 
effecting the output. Will post that info soon I hope.
K4CHE

On 4/25/2017 5:59 PM, Tom Brent wrote:
> I was sorting through a pile of recently acquired quartz crystals 
> today (I know, I need to get a life) and came across four in HC-6/U 
> cases, all made by a firm named Hill in 1967 with the following 
> frequencies:
>
> 497.5 KHz
> 498.5 KHz
> 501.5 KHz
> 502.5 KHz
>
> I presume these are for something operating with a 500 KHz center 
> frequency, can anyone tell me what equipment it might be?
>
> Happy tinkering.
>
> Tom
>
>
>
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