[Elecraft] FW 4.67 and K3EXREF

[Henk PA5KT]

I had the same. Finally I did read the release notes:

K3EXREF USERS MUST NOW ENABLE THE MODULE IN THE MENU: To do this, locate 
the CONFIG:REF CAL menu entry and tap 2 to change the setting; flashes 
XREF IN or XREFOUT. If you DO NOT have a K3EXREF module installed, use 
the XREFOUT setting (the default). If you use the XREF IN setting 
without a K3EXREF module installed, you may hear digital switching noise 
on the 6-meter band.

73 Henk PA5KT

Op 7-7-2013 5:54, Stan Gibbs schreef:
> I just realized that both my K3's running FW 4.67 are no longer locking to
> the K3EXREF calibration signal from a Trimble Thunderbolt. Specifically, the
> "REF CAL" config menu item does not show the flashing asterisk and moving
> the main tuning knob does not show "LOCKED". I have had the K3EXREF
> installed and operating properly with both rigs for at least a year.
>
> The Trimble Thunderbolt provides the 10MHz calibration signal to both K3's
> though a MiniCircuits splitter. After checking the power supply and output
> levels of the Thunderbolt, which were nominal, I decided to see if the K3
> firmware could be responsible, since I had fairly recently upgraded to 4.67.
> Indeed, rolling back to 4.51 re-enables the normal "REF CAL" behavior!
>
> Can anyone else verify this?
>
>
>
>
>
> -----
> 73, Stan - KR7C
> --
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