[Elecraft] TX IMD problem

Hello All, I checked my K3's TX IMD today(K3 SN:1302), from 5W to 110W. Very good TX IMD when I set the output power to 35w( 50db), but very poor when I set it to 100w or 110w(20~18db). Any one can help? I have about 10 photos for this test, if interest I can send via email offline.

Re: [Elecraft] TX IMD problem

I have measured myself however didn´t come up with as poor and/or as good numbers. What could be interesting is with what and how did you measure. / Jim SM2EKM - chen dave wrote: Hello All, I checked my K3's TX IMD today(K3 SN:1302), from 5W to 110W. Very good TX IMD

Re: [Elecraft] TX IMD problem

Hi Jim, I use K3 internal 2 tones test function + SDR-IQ+ SpectraVue3. If need I can use HP RF spectrum monitor to test it. http://photo.blog.sina.com.cn/u/1411826944 for test photos. 73 de ba4rf,David 2010/4/4 Jan Erik Holm sm2...@telia.com I have measured myself however didn´t

Re: [Elecraft] TX IMD problem

On Apr 4, 2010, at 4/46:50 AM, chen dave wrote: I use K3 internal 2 tones test function + SDR-IQ+ SpectraVue3. Are you ignoring the crest factor of the two tone test signal? To get 100 watts average RF power from a two tone signal, the instantaneous peak power has to be nearly 200