[Elecraft] K3 6M problem

[Joe Subich, W4TV]

Normally I would tell you to connect your dummy load, enable the KAT3,
tune into the dummy load then disable the tuner and try the antenna.
However, I know there is an issue with the KAT3 finding the right match
on 6 meters.

Since you're seeing a high SWR after field day, inspect the KAT3
carefully to see if the 8 MHz trap has been damaged (extended TX into
a less than ideal load).  Damage to that trap will be most evident on
six.

73,

    ... Joe, W4TV


On 7/1/2011 1:25 PM, James C. Hall, MD wrote:
> The radio was used at the digital station, so RTTY was the active mode. 6M
> was not used on this radio.
>
> Ron, yes, you are quite correct about the ATU - it does work on 6M. :) I
> just never had to use it. Just for grins I switched in the ATU and could
> only get 3.9:1 SWR. Taking the cable off the ANT connector and putting it on
> my MFJ analyzer, it shows 1.3:1.
>
> Sigh ... Worked perfectly on 6M prior to taking it to FD.
>
> 73, Jamie
> WB4YDL
>
> -----Original Message-----
> From: Joe Subich, W4TV [mailto:lists at subich.com]
> Sent: Friday, July 01, 2011 11:51 AM
> To: James C. Hall, MD; Elecraft Reflector
> Subject: Re: [Elecraft] K3 6M problem
>
>
>
> Jamie,
>
> Did the antenna selection on the K3 get toggled to ANT 1 for
> six meters?  Remember the ATN1/ANT2 is stored on a per band
> basis.  If the rig was used in 6 with ANT 1 at field day, it's
> likely that ANT 1 is still selected!
>
> 73,
>
>      ... Joe, W4TV
>
>
> On 7/1/2011 12:06 PM, James C. Hall, MD wrote:
>> Hello:
>>
>>
>>
>> After returning my K3 back to the shack after Field Day, I have discovered
>> that 6M no longer transmits with low SWR. I checked all the rear panel
>> connections as it is interfaced through a microham MK2R+ and Stationmaster
>> band decoder. However, I have the 6M antenna coax directly going to
> Antenna
>> 2 on the radio. Using an antenna analyzer, the antenna shows excellent
> SWR.
>> Using a dummy load to each antenna port, all bands shows good SWR except
> 6M.
>> I updated the firmware and cycled the power but I still have the HI SWR
>> showing with 6M.
>>
>>
>>
>> I do have the PR6 pre-amp in line, but the problem is not receive.
>>
>>
>>
>> I'm stumped. Any help appreciated.
>>
>>
>>
>> 73, Jamie
>>
>> WB4YDL
>>
>>
>