[Elecraft] K3XREF Question
hawley, charles j jr
c-hawley at illinois.edu
Thu Feb 14 20:37:43 EST 2013
Yes. I have had the GPS system and also the Rubidium and other than seeing my HP counter with the oven controlled oscillator agree with them from time to time, I have to say it was pretty boring. Eventually both the standards broke and the HP is still with me.
Chuck, KE9UW
Lionel Trains, TCA, LCCA, LRRC
aka Jack, BMW Motorcycles BMWMOA #224
________________________________________
From: elecraft-bounces at mailman.qth.net [elecraft-bounces at mailman.qth.net] on behalf of Chuck Smallhouse [w7cs at theriver.com]
Sent: Thursday, February 14, 2013 6:18 PM
To: Elecraft at mailman.qth.net
Subject: [Elecraft] K3XREF Question
Hi Don and All
IMHO using a GPS disciplined 10 MHz (Trimble etc.) or a Rubidium
standards are unnecessary , expensive and overly complicated
approaches, to be used as the K3XREF 10 MHz external source.
There are extremely stable (as high as 10 x-12th) Double Oven
Controlled Xtal Oscillators (OCXOs) available on the Off Shore
surplus market, for under $50 delivered. These are pulls from US
built surplus equipment, and are guaranteed and tested . I have
bought several, and the latest one has been bench tested for several
months, and after initial adjustment has not varied a single cycle on
my GPS locked counter. Even this stability, is an overkill, when
used as an external reference for the "frequency", not "phase" locked K3.
These OCXOs are less than 2" cube in size and available on e-Bay from
several dealers. Check e-Bay under the subject OCXO.
Chuck, W7CS
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