[Elecraft] KAT3 and Six Meters ...

[Joe Subich, W4TV]

Rich,

Your symptoms are identical to mine.

I've done some additional diagnosis with some interesting but
confusing findings:

1) Switching to CONFIG:KAT3 = LC SET allows me to manually tune
    the KAT3 for minimum SWR as indicated on the K3 SWR meter.

2) If I swap the tuner boards between my two K3s, the problem
    stays in the K3 (does not follow the board).

3) The second K3/KAT3 works normally - pressing "ATU TUNE" on
    Six will find the proper low SWR.  The CA/Ct/L values found
    automatically by the second K3 are the same as those I found
    manually on the first unit.

73,

    ... Joe, W4TV


On 5/28/2011 7:16 AM, Rich - K1HTV wrote:
> Joe,
> You are not alone.  I've noticed the same problem here with my K3's ATU. With
> the ATU in BYPASS the SWR is low on my 6M yagi. When I turn the ATU on and press
> the tune button, the K3 finds a dip, but when I transmit, the SWR is much higher
> than with the ATU turned on. Pressing the tune button a 2nd or 3rd time makes do
> difference.
>
> As you reported, this does not happen on any of the other HF bands.
>
> 73,
> Rich - K1HTV
>
> = = =
>
> ----Original Message-----
> From: Joe Subich, W4TV [mailto:lists at subich.com]
> Sent: Friday, May 27, 2011 11:42 AM
> To: Elecraft Reflector
> Subject: [Elecraft] KAT3 and Six Meters ...
>
>
> I'm seeing a strange behavior with the KAT3 on six.
>
> If I engage the tuner it finds a low SWR and stops tuning.
> However, if I then close the Key the K3 shows "HI SWR" and folds back.  This
> happens even on the dummy load (1.15:1).
> It does not happen on any other band.
>
> Suggestions?
>
> 73,
>
>      ... Joe, W4TV
>
>
>