[Elecraft] Calibration of KX3 may not be necessary

[Geoffrey Feldman]

Send email to support at elecraft.com with the serial number of your rig
(either the sticker on the back or displayed in the rigs parameters) and
request the original configuration file.   Whether your kX3 was a kit build
or assembled, it was calibrated with the original configuration file kept by
elecraft.   Using the utility, download this configuration to the KX3.  Wait
a minute or two so the circuit is warmed up.  You may very likely find that
it's properly calibrated.

Save the current configuration of your KX3.  If you don't feel this exercise
was helpful, you can return your KX3 to the way you had it. Otherwise, you
will have to go through the menu and establish any settings that are
different from the original factory state.

I don't know if the XG3 signal source sold by Elecraft (and back ordered
despite the "Estimated Ship Date" is suitable for calibration but unless you
are really picky or doing something exotic - I feel the calibration
procedure is unnecessary.  

I installed the 2M VHF module and went through this question --- I
ultimately concluded that restoring the factory calibration is probably the
best option.  After the 2M option was installed I compared transmit and
receive to other VHF radios in a variety of ambient temperatures and case
temperatures and it was exactly right.  

Geoff W1GCF