Thanks, Alan; that explains the notch perfectly. My own version of the problem, however, is that the PX3 exhibits narrow S2+ spikes on either side of the notch. Any ideas about that? I have not seen it mentioned in the archives.
Ted, KN1CBR > >Message: 3 >Date: Wed, 17 Jun 2015 08:37:37 -0700 >From: Alan <[email protected]> >To: [email protected] >Subject: Re: [Elecraft] PX3 problem >Message-ID: <[email protected]> >Content-Type: text/plain; charset=windows-1252; format=flowe >I think you must be referring to the notch that occurs at the KX3 VFO >frequency. The I/Q output of the KX3 is AC-coupled so there is no >response at zero HZ, which corresponds to the KX3 VFO frequency. In CW >mode, this is offset from the receive frequency by the CW pitch, >typically 600 Hz, either above or below the passband, depending on which >sideband is selected. > >If there is any 60 Hz or other line-related hum getting into the I/Q >input then you will see n*60 Hz sidebands on either side of the notch. > >Alan N1AL > > >On 06/16/2015 06:01 PM, John K7JLT wrote: >> I have not heard anything from Elecraft about this problem. >> >> John K7JLT >> >> "Dauer, Edward" <[email protected]> wrote: >> >>> Just saw your posts in the archives. I am experiencing the same, >>>except that in my case there are two narrow S2 spikes at either end of >>>the empty gap. Has anyone at the factory ever commented or explained >>>what could be done? >>> >>> Ted, KN1CBR >> ______________________________________________________________ > ______________________________________________________________ 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 Message delivered to [email protected]
