[Elecraft] [KX3] Frequency Drift on JT-65

[Edward R Cole]

Lance,

Nice work and good info on running JT65A on 6m.  I haven't tried to 
interface my KX3 for using JT65, yet.  I am hopeful a frequency 
correction circuit for use of an ext. reference is forthcoming from 
Elecraft.  Use of the EXREF on my K3 is very useful on frequencies 
into the microwaves as the delta-F of the IF radio is added to the 
delta-F of the transverter.  MY 432 and 1296 transverters are 
phase-locked to the same reference so I get, at most, 3-Hz 
error.  Drift of the K3 is smaller than the offset by almost an order 
of magnitude.  Of course I run the 1mw transverter mode with the K3 
so the 10w module is not keyed.

On 144 the transverter is xtal controlled but only drifts upward 5-Hz 
for a total error of 11-Hz (rest freq is +6 Hz including the offset 
of the K3 on 28-MHz).

Since the forthcoming Elecraft 2m module will use 50-MHz as IF it 
will benefit from better frequency stability.

73, Ed - KL7UW