[Lowfer] Part-15 Xtal Needs

[PAUL DAULTON]

Bill
I would like to have a schematic. I have several of the 5.188 xtals .
how do you get the divide by 28.

i also have considered using my norcal fcc1/2 synthesizer and counter. I 
have used it as a signal generator it has 1hz resolution.

My beacon on 187.5 uses a 6.0mhz xtal. With no temmp compension I have
about .8hz drift day to night. I am thinking of epoxying a wheat lamp to the 
xtal for compensation.

I use the mouser 5.188 xtal in several of my qrp ssb rigs.
Paul k5wms
From: Bill Ashlock <ashlockw at hotmail.com>
To: "Discussion of the Lowfer (US,  European,  &amp;  UK) and MedFer bands" <lowfer at mailman.qth.net>
Send: 2008-01-29
Subject: RE: [Lowfer] Part-15 Xtal Needs


Hey Peter,
 
If you are interested in constructing an exciter for the Pt 15 watering hole
for about $2.00 use a 5.188 xtal (only 40 cents from Mouser, but highly stable)
and divide by 28. Use a series trimmer cap to pull the 185.18 base frequency up
to what ever you want. I have found that using a separate FET oscillator rather
than a Cmos divider chip that includes a front end oscillator stage, is more
pullable and more frequency stable. Let me know if you need the schematic.
 
Bill&gt; Date: Tue, 29 Jan 2008 18:56:25 -0600&gt; From: pbarick at wpo.cso.niu.edu&gt;
To: lowfer at mailman.qth.net&gt;
Subject: Re: [Lowfer] Part-15 Xtal Needs&gt; &gt; LF'Rs all,&gt; &gt; Here's a
report, a price quote from the M H vendor of cut crystals.&gt; &gt; They will
do a special freq for $20 and $6 S&amp;H. Price goes down for&gt; two or
more.&gt; &gt; Seems like an OK deal given the small order. Takes 2-3
weeks.&gt; &gt; I believe I'll spec it high so as to pad it as needed. Now just
how much should that be.&gt; &gt; P&gt;
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PAUL DAULTON
K5WMS
JACKSONVILLE,AR