[Elecraft] Fwd: Re: K3 signal at 28004

[Al Duncan VE3RRD]

I have a KX3 with the KXPA100 amp (with internal tuner), and I also hear 
a strong S6 to S7 carrier on 28004.3 KHz. The signal disappears when I 
set the KX3 "PA MODE" to OFF.

73, AL - VE3RRD


On 12/11/2016 6:23 PM, Mike Harris wrote:
> Hi,
>
> The S3 signal is probably from within the K3. As previously mentioned 
> I have this signal which in my case is 28004.676. Note: I do not have 
> a KAT500.
>
> Out of curiosity I changed the K3 REF CAL parameter from the last 
> calibration setting of 49.379.892 to 49.379.700 a change of 192. The 
> frequency of the odd signal shifted and was displayed now on 28004.559 
> a change of 117Hz. This might give an indication as to why different 
> K3's present this signal at slightly different frequencies.
>
> I indicated in an earlier post that the signal vanished when PRE 2 was 
> activated, this was entirely due to it being buried by extra antenna 
> noise. When I repeated the test with my XG3 which clearly doesn't have 
> a load of antenna noise the signal still dropped by an indicated 8dBV 
> or so, if I remember correctly, when switching from PRE 1 to PRE 2. 
> This still makes me think it is due to a locational change within the 
> box of the respective pre-amps.
>
> Does this matter, not a bit. At least it is Elecraft related.
>
> Regards,
>
> Mike VP8NO