[Elecraft] New PX3 - question on a signal that doesn't move

[Thorpe, Jeffrey]

Thanks everyone for the responses.
Also found a post from a few years back that talked about this too (from Don I think referencing Wayne). Puts my mind to rest. I was worried that I may have messed up my assembly, but it turns out that this thing is so sensitive that it can hear/interfere with itself!
Kind of like the ringing in my ears.

Jeff - kg7hdz

On Dec 29, 2017, at 7:21 PM, Dale Boresz <dmboresz at gmail.com<mailto:dmboresz at gmail.com>> wrote:

Jeff,

Do you by chance have ATTN on the KX3 engaged? If so, turn it off, and turn on the PREamp on the KX3. That should eliminate the peaks in the PX3 that you are seeing.

73,

Dale - WA8SRA


On Fri, Dec 29, 2017 at 4:07 PM, Thorpe, Jeffrey <jthorpe at liberty.edu<mailto:jthorpe at liberty.edu>> wrote:
Ok - finished doing the Opposite Sideband Nulling. (Also made sure the plugs were seated properly.)

The signals still show on the PX3 display, but not as strongly.
I’ve checked it on all bands and each band has at least one of these signals, some have up to six showing (with span set to 50.)
The placement of the signals is not the the same from band to band, however no signal is less than 12khz from the center frequency. Again, tuning up or down within the band does not affect the displayed signal.

Any ideas?

Jeff - kg7hdz

> On Dec 22, 2017, at 3:35 PM, Don Wilhelm <donwilh at embarqmail.com<mailto:donwilh at embarqmail.com>> wrote:
>
> Jeff,
>
> Have you done the Opposite Sideband Nulling (page 26 in the manual).
> Make certain the RX IQ plugs are fully seated at both ends.
> See Trobleshooting on page 33 in the manual.
>
> 73,
> Don W3FPR
>
>> On 12/22/2017 5:15 PM, Thorpe, Jeffrey wrote:
>> Probably a dumb question. New to using pan adapters, and just got my PX3 put together.
>> I hooked it up to my KX3, tuned around on 40m (using a home-brewed AS-2259 NVIS type dual dipole for 40m and 80m) and I get really strong signal indications close to 19khz both above and below the center frequency on the display. It doesn’t matter where I tune in the band. If I adjust the scale, the signals stay at the +/- point of about 19khz. They appear stronger than any other signal in the display.
>> I am running the KX3 off internal batteries, and the PX3 off a LiFePO4.
>> Are these signals from something outside being picked up in the cables between the KX3 and PX3, a problem with the PX3, or something else (like, maybe, me)?
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