Jamie,
> OK, so now I know something's afoot inside my K3. What do I need to
> do ? Someone mentioned clipping an offending component while waiting
> on a replacement part. What part do I need to order ?
e-mail k3supp...@elecraft.com ... they can give you the information
to bypass the 8 MHz trap (unfortunately I failed to keep the info)
until you can order a replacement/exchange KAT3.
The trap is L10/C10 on the KAT3 board.
One other thing to try ... swap to ANT 2. It's possible that SA1 is
breaking down under power although I would expect that to be an issue
on all bands.
73,
... Joe, W4TV
On 7/1/2011 2:54 PM, James C. Hall, MD wrote:
> OK, more data points. Since I was getting good SWR at the mW level with the
> analyzer, I cranked the power down to 1 watt and pressed tune. Got good SWR
> and 1 watt out. OK gently walked the power up and tried again. At 1.9 watts,
> I would get good SWR for a second and then it indicated 8.9:1 SWR.
>
> I went out and bypassed the ICE suppressor and that made no difference. The
> only other radio I have that operates on 6M is my IC-706 - um, mobile. So I
> jerked it out of the truck and rigged it up in the shack and ran an SWR
> graph - less than 1.3:1 all the way. OK, so I hear FG5GP on 50.130 MHz and
> give him a call with 100 watts - no problem. He was 57 on my meter and he
> gave me a 57 report back.
>
> OK, so now I know something's afoot inside my K3. What do I need to do ?
> Someone mentioned clipping an offending component while waiting on a
> replacement part. What part do I need to order ?
>
> 73 and thanks for all the help !
>
> Jamie, WB4YDL
>
> -----Original Message-----
> From: Joe Subich, W4TV [mailto:li...@subich.com]
> Sent: Friday, July 01, 2011 1:02 PM
> To: James C. Hall, MD; Elecraft Reflector
> Subject: Re: [Elecraft] K3 6M problem
>
>
> 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:li...@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
>>>
>>>
>>
>
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