[Elecraft] PX3 Anomaly

[John K7JLT]

Both of these problems have been reported here.  The second problem is better but still exists.  On the first with the blip that is offset I use the workaround of operating CW with a reverse offset until they get it fixed.  At least there isn't any off set used on field day.

John K7JLT

Phil Wheeler <w7ox at socal.rr.com> wrote:

>Make sure those (all!) cables are fully inserted, 
>Ted. I've found that to take more "push" in the 
>case of the KX3 and PX3 than some of my other devices.
>
>Phil W7OX
>
>On 6/13/15 4:39 PM, Dauer, Edward wrote:
>> Finally got the KX3 – PX3 – KXPA100 system cabled together and on the air
>> today, all of the F/W updated.  All OK but for two anomalies, one of them
>> a bit of a nuisance.
>>   
>>
>> The PX3 shows a double sharp spike offset from the tuned frequency about
>> 600 and 700 Hz (an eyeball estimate), at about S2.  The twin spikes just
>> stay there a fixed offset away from the marker as the rest of the band
>> marches by.  (The PX3 is in tracking mode – I haven’t downloaded the beta
>> revision.)  Same thing on every band I’ve tried – 10, 15, 20 and 40.  Some
>> other symptoms:
>>   
>>
>> The small bit of spectrum (about 100 Hz) between the two spikes is devoid
>> of signal – jet black even when the ref level is set so that the rest of
>> the waterfall span is showing blue.
>>   
>>
>> The spikes appear in CW mode but not in AM or SSB.  They switch sides when
>> I switch cw sidebands – 600 and 700 Hz below center when the KX3 is in CW
>> rev, and the same distance above center when it’s changed back.
>>   
>>
>> When the i/Q cable is disconnected at either end, the spikes slowly
>> decline.  But with the cable connected and the KX3 power turned off, they
>> are still there on the PX3.
>>   
>>
>> The spikes remain at 600 and 700 Hz offset from center regardless of the
>> span setting.
>>   
>>
>> Weird.  And troubling, because 300 - 600 Hz is a typical XIT offset I use
>> in pileups when the DX isn’t working “up.”  Anyone have any ideas?  Anyone
>> seen this before?
>>   
>>
>> The other glitch is much less trouble.  The KX3 setting sometimes switches
>> itself from PA Mode On to PA Mode off.  I think I’ve figured it out – if I
>> turn the KXPA100 power off before turning the KX3 off, or if I turn the
>> KX3 on before powering up the amp, the KX3 must be sensing “no amp” and so
>> switching itself back to PA Mode Off.  But then when the amp comes on, the
>> KX3 doesn’t sense that and switch back to PA Mode On. An intelligent
>> default choice, maybe.  Any way to defeat it?
>>   
>>
>>
>> Ted, KN1CBR
>
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