Hello Fred, I see a very similar thing on my IC-7700. Different frequency spacings but pretty much as you described.
They're visible on the band scope but that's it. I can't detect any I'll effect from them. They're so far down to be of no consequence. I write them off as images in the DSP processing that produces the bandscope and appreciate that absolutely nothing is perfect. 73's Peter VK4JD -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Fred Jensen Sent: Tuesday, 19 February 2013 6:42 AM To: Elecraft Reflector Subject: [Elecraft] K3 P3 Spurious signals K3 [#642] w/P3 in FixTune mode [cursor moves, ends of screen are fixed]. K3 has the resistor mod to increase the 8 MHz IF output. I see them on CW, I haven't tried SSB. I've got a pair of weak, steady spurious signals ~14.5 KHz above and below the VFO A cursor. They tune with the VFO [i.e. I can never tune to them] With a noise floor around -135dBm, they run about -115 dBm. I see them only on 10m, however my noise floor is in the -120 to -115dBm range on other bands and they may be there and I just can't see them. With no antenna, the signals appear to be each bracketed by two very weak bands of noise about 2 KHz wide, about 3 KHz above and below each signal. They only show up on the waterfall [I use a monochrome WF]. The K3 and P3 appear to be working just fine and I only notice them because when I tune VFO A, I end up with faint slanting traces on the WF. Anyone have an explanation? 73, Fred K6DGW - Northern California Contest Club - CU in the 2013 Cal QSO Party 5-6 Oct 2013 - www.cqp.org ______________________________________________________________ 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
