[Elecraft] Oddity in K3 with new synthesizer

[brian]

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