[Elecraft] K2: Transmitting a little low

[David Woolley (E.L)]

Jay wrote:
> ...someone can refresh the step I need to do (so I don't have to relearn
> the complete alignment process). On lower SSB I'm being told I'm 100
> hertz low transmitting, but the receiver is just fine. I don't want
> to mess up my cw settings since

Provided that you use filter 1, configured as the SSB board filter, for 
receive, the frequency determining parts of the system are the same on 
transmit and receive, so if the frequency display is the same, which it 
will be unless you use RIT/XIT or split, there is no official adjustment 
that would work here.

If you use another filter, for receive, and it was not calibrated at the 
  same time as filter 1, the rig's idea of the the IF frequency for that 
filter could be wrong.  In that case, it should be fixable by 
re-calibrating the filter without making any real change (although, if 
the calibration is that far off, the filter may no longer be at the 
correct position in the passband).  To just re-measure the required BFO 
voltage and corresponding frequency, you need to tweak the filter up one 
and then down one, so that the rig registers a change.

You will also need to do a PLL calibration, unless you are certain that 
the 4MHz oscillator has not changed since you last did that (including 
temperature changes).

Using a different filter will also produce a small error, because of the 
resolution limits of the VFO and BFO, but that should be of the order of 
10Hz, or less, not 100Hz.

I guess other possibilities are:

1) one of you is misjudging the zero beat frequency;

2) poor power supply regulation is causing a frequency shift;

3) RF on the chassis is getting ito the the frequency tweaking varicaps 
and causing a shift.


> everything is perfect (for me).  Any help moving my transmit sig up 100 
> hertz (w/o using XIT!) would be appreciated.

-- 
David Woolley
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