[Elecraft] K3 Transmit Issue on 80M SSB

[Don Wilhelm]

Dave,

I am glad to hear that you have it sorted out.

You should not *normally* have to do a TX Gain Calibration after a 
firmware upgrade.  However, I do not know how old your prior firmware 
happened to be.
There was a prior firmware upgrade which moved the location where the TX 
Gain Calibration data was stored, and after *that* particular update it 
was necessary to do the TX Gain Calibration in order to move the values 
to the new location.

If something like that occurs again, it will be pointed out in the 
Firmware Release Notes.
It would be wise to read *all* the Firmware Release Notes between the 
firmware that you had in your K3(S) and the most current level to see if 
any special actions are necessary.

73,
Don W3FPR

On 1/22/2017 6:54 PM, Dave Fugleberg wrote:
> Thanks to all for your suggestions. Carl's suggestion to run the 5 and 
> 50 W transmitter gain calibration appears to have solved the issue, 
> although I have no idea why.
>
> Don, I'm familiar with how much drive the K3 wants from the mic, and 
> have it set properly for my HC-5 element. The behavior was not erratic 
> - it was easily repeatable using the steps I described. After running 
> the calibrations, I can no longer repeat the issue.
> The only time I had ever previously run the calibrations was during 
> final setup after assembling the radio a couple years ago.  Is that 
> something that one should do periodically, or after each firmware update?
>
>