James, I am getting a much lower level of noise than you. With no antenna and the preamp off, the first bar on the S-meter barely flickers. When I spin the dial quickly I can get as high as S3 noise. The noise disappears below 4.930 and above 5.110.
I only hear the noise in the main receiver. I can spin the dial on the sub-receiver, if turned on and also hear the noise in the main receiver. There is never noise in the sub-receiver. With a dummy load on ANT 1, ANT 2, AUX and RCV inputs there is noise in the main receiver when spinning the dial with any antenna port selected. Once I have an antenna hooked up and the background noise is at least S3 on that antenna port I can't hear the noise when spinning the dial. Yes, you can forward this info to whomever you want. 73, N2TK/NP2, Tony -----Original Message----- From: James Sarte [mailto:[email protected]] Sent: Sunday, March 01, 2009 10:06 PM To: 'N2TK' Cc: [email protected] Subject: RE: [Elecraft] Weird EMI issue... part deux Hi Tony, Thanks for taking the time to do that test for me. I do hear the noise with an antenna connected, but the antenna is not tuned for 5MHz so the noise floor is pretty low. I do not hear this noise through the sub receiver if I use the AUX BNC connector, but I will hear it through the sub receiver if it's using the same antenna as the main receiver. Otherwise, everything else you've described is what I'm experiencing. This noise is around an S5 to maybe S7 on the meter when I move the VFO knob. As you also discovered, turning the preamp on raises the noise floor masking most of the EMI. It's not very noticeable when the preamp is on. Would it be OK to forward this email to Elecraft tech support? I've been maintaining a running dialogue with them regarding this issue, and your findings may help them to develop a solution. Thanks again and 73, James KC2UEE -----Original Message----- From: N2TK [mailto:[email protected]] Sent: Sunday, March 01, 2009 8:32 PM To: 'amstel78' Cc: [email protected] Subject: RE: [Elecraft] Weird EMI issue... part deux I was using SSB settings and had an antenna hooked up. I did not hear any noise I put a dummy load on the antenna jack and used AM mode. I can hear noise as I turn the dial. I can just barely hear the noise when I turn on the preamp. And with any antenna hooked up I do not hear any noise at all as I turn the dial. Jim, do you hear this noise with an antenna hooked up? I do not, so as far as I am concerned it does not exist. However if you hear this noise when you have an antenna hooked up you need to talk some more to Elecraft support. 73, N2TK/NP2, Tony ______________________________________________________________ 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
