[Elecraft] PX3 Problem

[Dauer, Edward]

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 <n1al at sonic.net>
>To: elecraft at mailman.qth.net
>Subject: Re: [Elecraft] PX3 problem
>Message-ID: <55819441.8050803 at sonic.net>
>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" <edauer at law.du.edu> 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
>> ______________________________________________________________
>