[Elecraft] Dual Signal Image on NaP3 with KX3

Don Wilhelm w3fpr at embarqmail.com
Fri May 31 23:50:01 EDT 2013


Ariel,

Before any other attempts at image rejection in NaP3, check your 
soundcard audio levels.  Both the left and right channel gains must be 
the same for a good starting point.  Also be certain that the audio 
cables are of good quality and the connectors are seated properly.

If you have equal amplitude images, it may be that you only have one 
channel feeding the soundcard.

73,
Don W3FPR

On 5/31/2013 11:36 PM, Ariel Jacala wrote:
> I tried the XG3 with the biggest signal on it and I still have the mirror image.  Do I tune right to the big signal and then move away?
>
> Ariel NY4G
>
> Sent from my iPad
>
> On May 31, 2013, at 11:11 PM, "Tony Estep" <esteptony at gmail.com> wrote:
>
>> On Fri, May 31, 2013 at 9:46 PM, Ariel Jacala <ny4g at hotmail.com> wrote:
>>
>>> I get a dual image on my NaP3 display....
>> ==============
>> Ariel, sometimes NaP3's I-Q autobalancing gets discombobulated. It can be
>> cured very simply by putting in a very big carrier, S9+40 or so. I have my
>> XG-3 connected to the receive antenna input on the K3. When my NaP3 gets
>> out of sorts (not frequent, maybe once a month) I switch over to the RX
>> Ant, turn on the XG3 to the 0 dBm level, and tune the receiver to about 40
>> Khz away from the signal. This fixes the display immediately.
>>
>> This presumes that you do have the sound card and everything else set up
>> correctly. If you do, this simple trick will wake up NaP3's autobalance,
>> which will eliminate images from the display and make it perform perfectly.
>>
>> Tony KT0NY
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