[From nobody Mon Jan 10 18:47:51 2011
From: "k5cr@juno.com" <k5cr@juno.com>
To: "john.clark@STATE.CO.US" <john.clark@STATE.CO.US>
Subject: Re: FW: HW-101 step 4
Date: Thu, 13 May 1999 07:21:00 -0600
MIME-Version: 1.0
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: 7bit

John:

The freq of the crystals is changing due to the plate load impedance
changing as you tune the oscillator coils.   I see that they all look to
be on the low freq. side of the stated crystal freq.   Is there a chance
the freq counter is loading the oscillator and shifting the freq down??
It is possible that when you disconnect the freq counter the osc. freq
is
going up.

I would set the tuning to 80 to 90 percent of the peak grid voltage and
let it go.   The way to tune the crystals on freq would be by changing
the oscillator load cap. (reducing the capacitance that the crystal).
Usually as the crystal ages the freq goes up but I see that your list
showes they are lower than the marked freq.  This makes me think the
freq
counter is loading the oscillator.

Hope this helps.

73

Doug/K5CR
___________________________________________________________________
You don't need to buy Internet access to use free Internet e-mail.
Get completely free e-mail from Juno at http://www.juno.com/getjuno.html
or call Juno at (800) 654-JUNO [654-5866]
]