When I get time I'll have to look at this. I have an old K3 with the original
synthesizer and no TCXO and a new K3S with a TCXO.
I also now have a GPSDO. After getting this, I checked the K3S and was not
thrilled to see that the TCXO required a 20 Hz adjustment.
Wes N7WS
On 3/5/2016 6:43 AM, brian wrote:
Guys,
I wonder if anybody else noticed this. I'm wondering if there is an
explanation.
Picked up a high S/N K3 which has new syntheizers installed. It also has the
TCXO installed. No ref lock board.
Looked at the pitch vs time from a Rb locked signal generator at 10 MHz.
I see sawtooth variations in pitch of about 0.15 Hz peak-to-peak with periods
of about 30-45 seconds.
Anybody else notice this?
These variations do not show up when the identical experiment is performed
using a TS-480 with high stability oscillator. Rather all variations are
smooth. They did not show up on an older K3 with the old synthesizer boards.
Yes the variations are small but the discontinuous nature is of some concern.
73 de Brian/K3KO
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