[Elecraft] K3 bad TX

[Steve Ellington]

I believe by "amp" we are talking about disabling the KPA3 in the CONFIG 
menu by putting it in bypass to see if the spur is related to the K3's 
internal AMP, not an external amp.
Steve
N4LQ
N4LQ at carolina.rr.com
----- Original Message ----- 
From: "David Gilbert" <xdavid at cis-broadband.com>
To: "Toni Lindén" <oh2ua at oh2u.com>
Cc: <elecraft at mailman.qth.net>
Sent: Sunday, October 04, 2009 12:13 PM
Subject: Re: [Elecraft] K3 bad TX



I don't understand ... if you used two different K3's and the same amp
(I assume for both K3's), how does that remove the amp as a possible
cause of the spurs?  I don't think you narrow anything down to the K3
until you check the results into a dummy load.  If you have two K3's,
transmit into a dummy load with one while you check for spurs with the
other.

73,
Dave   AB7E



Toni Lindén wrote:
> I was using SO2R with pair of K3s' and had similar reports with both
> radios, so I guess it's not the amp issue. The bands where I got
> reports were 20M and 15M (on 10M were no propagation and maybe 40M and
> 80M were too noisy to notice the 2nd sigs).
>
> All antennas are OK and no difference was noted with antennas.
>
> 73 de Toni, OH2UA
>
>
>
>> Tke the amp out of the equation and see if you still have the issue. Try 
>> a
>> different antenna and check the SWR. I would suspect one of those to be 
>> the
>> issue. At least it will eliminate some variables.
>>
>> Dan AB3EN
>>
>>
>
> Toni Lindén wrote:
>
>> Hi!
>>
>> I was trying K3 for first time in SAC contest a couple of weeks ago.
>>
>> During the contest I got multiple reports that besides of my run
>> frequency, I also had other reasonable strong signals "around the
>> band".
>>
>> It cleared out that I had at least one other signal about 7kHz away
>> from my actual freq. It was quite strong, maybe 40dBs down from my
>> running freq.
>>
>> Have anyone else had similar problems and do you have any suggestion
>> how to fix this?
>>
>> I was using only about 60 to 70 watts drive for the amp and amp was
>> not pushed over. The same appears on both, CW and SSB. Radio has the
>> most resent FWs available via K3 utility SW.
>>
>> I'm planning to take K3 with me to CU2 for CQWW, but after getting
>> such a bad reports about "my 2nd pileup" on the same band, I'm not
>> sure if I'm willing to make such an interference to others on CQWW...
>>
>> So if anyone has any advice, I'm more than pleased to hear!
>>
>>
>> 73 de Toni, OH2UA
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft at mailman.qth.net

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html