[Boatanchors] Pair of Crystals needed

[Al Klase]

Hello Keith,

Probably your best shot is the FT-241 tank radio crystals, the armor 
frequencies in particular. They are labeled channel 0 thru 79. The 
operating frequency is 20 MHz + (ch. # divided by 10). So Channel 45 is 
24.5 MHz, and the crystal frequency is F / 54 or 453.7 KHz , Channel 48 
would get you 459.3 KHz for a spread of 5.6 KHz. Other combinations my 
be acceptable. There are entire sets of these crystals are still laying 
around in junk boxes everywhere. We built enough to invade Japan in 1946.

Good luck,
Al

On 3/8/2014 5:25 PM, Keith Densmore wrote:
> Hi All,
> I need a pair of crystals, any size ok although smaller is preferred.
>
> 453 and 457 KHZ or
> 452.5 and 475.5 KHZ or
> 452 and 458 KHZ
>
> For a product detector circuit for rigs with 455 KHZ IF
>
> Thanks, 73,
> Keith ve3ts
>
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-- 
Al Klase – N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/