[Elecraft] KAT500 auto trainer

[Bob McGraw K4TAX]

If adjustments are required several times a week for the 160M antenna, I 
would then question the electrical stability of the 160M antenna.  In 
otherwords, why and what is changing?

I see very little change in mine, wet, dry, ice, or snow. Usually I find 
it to be 1:3:1 or less across the band, any frequency and at any season.

73

Bob, K4TAX

On 12/15/2019 9:31 AM, Andy Durbin wrote:
> "Extremely easy to do manually and stable."
>
> It is only because my 160 and 80 m OCFD is being modified frequently that I decided to develop the auto trainer.   It takes multiple actions to tune a single bin and there are 20 bins for 160 m.   If a multi-step task needs to be done infrequently the effort required to automate it is not justified.  Do that task several times a week and the effort is easily justified.
>
> Actions to auto tune at current frequency:
>
>    1.  Inhibit the key line and wait for confirmation of inhibit
>    2.  Initiate KAT500 auto tune (FT;)
>    3.  Set Kenwood to TX Tune and set auto tune power
>    4.  Wait for KAT500 FT response which indicates tune is complete
>    5.  Set Kenwood TX Tune power back to 5 w then command RX
>    6.  Wait for confirmation that TX has stopped
>    7.  Enable the key line
>
> Since that sequence had already been assigned to a single button push it was not too difficult to repeat it for each bin in the current band.
>
> Andy, k3wyc
>
>
>
>
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