Ramiro, the in band IMD subject was discussed here on this reflector as well. Here is the link http://mailman.qth.net/pipermail/elecraft/2008-November/099616.html
73, Igor UA9CDC ----- Original Message ----- From: "Ramiro Aceves" <[email protected]> To: "Igor Sokolov" <[email protected]> Cc: <[email protected]> Sent: Tuesday, November 23, 2010 5:55 PM Subject: Re: [Elecraft] K3 RX spurs > Igor Sokolov escribió: >> Is this about 3rd order inband IMD? The subject was widely discussed some >> time ago. Just try to search the archaive. > > > Many information there, thanks > > http://www.cliftonlaboratories.com/elecraft_k3_receive_audio.htm#Introduction_and_Test_Setup_ > > This is very interesting, but I have not found IMD measurements made with > very closed test sigs. > > 73, Ramiro. > EA4NZ > > > >> >> 73, Igor UA9DC >> ----- Original Message ----- From: "Ramiro Aceves" <[email protected]> >> To: <[email protected]> >> Sent: Tuesday, November 23, 2010 3:20 PM >> Subject: [Elecraft] K3 RX spurs >> >> >> Hello K3 fans >> >> I am a bit stranged and frustrated cause nobody has answered a single >> word to my email "K3 RX spurs" posted on november the 20th. No comments, >> no ideas.... >> After some tests I have concluded that the spurs are 3rd order >> intermodulation products. They only occur in DATA or CW. >> ¿Can anyone please, try to reproduce those products in your K3/P3 or >> K3/computer combination?. >> >> "DATA A" mode: Cristal filter= 2.7KHz, SHIFT=1.5 KHz, WIDTH= 2.7 kHz >> Tune some steady carrier in shortwave. Tune the signal to place a >> beautiful 1000 Hz on the waterfall >> Tune your signal generator 10 Hz more than the broadcast carrier >> frequency to get an audio signal 10 Hz over the 1000 Hz signal. Adjust >> generator strenght to be similar to the broadcast carrier. >> >> You will see strong beautiful 3rd order products on 1020 and 990 Hz. >> Swith to USB--> much more weaker 3rd order products or inexistent. >> >> http://ea1abz.ure.es/3erd-order.jpeg >> >> That is my K3 behaviour. Just want to know if my K3 is ok or not. >> >> Many thanks. I appreciate your effort in doing this test for me. >> >> 73, Ramiro, EA4NZ. >> >> PD: Volume at the speaker is zero to avoid vibrations inside the K3 >> case. >> ______________________________________________________________ >> Elecraft mailing list >> Home: http://mailman.qth.net/mailman/listinfo/elecraft >> Help: http://mailman.qth.net/mmfaq.htm >> Post: mailto:[email protected] >> >> 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:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
