[Elecraft] Using X-lock to stabilize PLL osc??

[Matt Maguire]

How much of the drift you are observing is due to the PLL synthesizer, and how much is due to BFO drift?73, Matt VK2RQ

    _____________________________
From: N2PD <pdn at warwick.net>
Sent: mardi, novembre 24, 2015 2:21 AM
Subject: [Elecraft] Using X-lock to stabilize PLL osc??
To:  <elecraft at mailman.qth.net>


I've had my K2 #58xx for quite a few years now, but have recently added the
KPA 100 amp.  I would like to improve the frequency stability.  I have read
EVERYTHING on the internet about this subject, and have now been
experimenting with the PLL frequency compensation board, changing the RA
value, with mixed results.  Here's my question...I see that the compensation
unit varies the voltage applied to the varistors with changing temperature. 
I am wondering if it would be feasible to replace that unit with one of the
huff puff type stabilizers like the x-lock or K4DPK stabilizer that samples
the output of the oscillator and applies a correction voltage based on
frequency shift. Anyone tried this?



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Paul, N2PD
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