[Boatanchors] 17 M xtal for KWM-1
Bry Carling
bcarling at cfl.rr.com
Wed Jun 8 15:58:54 EDT 2011
Sounds tricky.
Pretty sure that I have some at 11.0775 MHz left here if someone needs them.
Bry, AF4K
http://www.af4k.com/collins_crystals.htm
On 8 Jun 2011 at 9:38, AI2Q wrote:
> To determine the xtal frequency you need to look at the rig's
> conversion
> scheme, and have your calculator in hand.
>
> To put my KWM-1 on 17 meters I determined that an 11.034 Mc rock
> would be
> doubled to 22.068 Mc. Then, subtracting 4 Mc would yield tuning at
> 18.068
> Mc. Subtracting 3.9 Mc would yield 18.168 Mc.
>
> Wishing to use what I had on hand (namely a KWM-2A military xtal
> pack), I
> deployed a KWM-2A's 11.0775 Mc crystal. That delivers coverage in my
> KWM-1
> from 18.14 through 18.168 Mc. The dial reads from 085 to 013. The
> dial at
> 0.0 corresponds to 18.153 Mc.
>
> Vy 73, AI2Q, Alex
> Member: ARRL, FOC, RSGB, CWops, QRP-L, Antique Wireless Association,
> Wide
> Area Amateur Radio Network
> http://home.roadrunner.com/~alexmm
>
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