ttp://www.kl7uw.com/K3EXREF.htm
Date: Sun, 29 Apr 2012 06:58:42 -0700
From: Matt Zilmer
Subject: Re: [Elecraft] K3 Frequency Shift
To: Mike Harris
Cc: elecraft@mailman.qth.net
Message-ID: <62iqp7l39asr4eh8abo3h36g64m6q5u...@4ax.com>
Content-Type: text/plain; charset=ISO-8859-1
>It would be interesting if someone with an EXTREF board installed would
>post the change in REF CAL number from cold to hot and extended run.
For K3 #24, w/EXTREF:
Cold start: 49.379.774 is typical;
After ~2 hours warmiing up: 49.379.693 is typical.
The EXTREF here is driven by a Trimble Thun
Quite so. The calibration against WWV is not a one time event, I do it
at least a couple of times a year. Actually it can vary a few counts in
a day, mainly dependent upon heat soak of the front panel. Mine
regularly runs at 37C.
If my understanding is correct the REF CAL number is a stored
Aging of components?
Vy 73, Olli - DH8BQA
http://www.dh8bqa.de/
- Original Message -
From: "w0ih"
To:
Sent: Sunday, April 29, 2012 4:52 AM
Subject: [Elecraft] K3 Frequency Shift
>A couple weeks ago, I was on 40 meters with a group of friends, and one of
> the guys (likes everyone o
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