[Elecraft] K3 VFO tuning hash

[hb9ari]

Hello,

I was totally in error when i thought it was an encoder generated noise.
I'm 100% ok with an internal (SPI?) bus generated noise;
i've just tested around 28.005MHz but with PowerSDR
tuning instead of VFO knob; the noise is there but
disappear when  no frequency change.

73 QRO fr Rudolf, HB9ARI

GW0ETF wrote:
> Wayne et al,
>
> I too can confirm the existence of what intuitively sounds like encoder
> clicks on the bottom end of 10m as well as the lower ends of 15 and 6m. Most
> times they are masked by antenna noise (and some pc low level hash here on
> 6...!) but it does seem to vary in 'severity' so I was interested in your
> comments about I/O devices etc. The bottom end of 10 does seem consistently
> the worst though.
>
> A couple of observations from here:-
>
> 1/ When switched on both RIT and SUB encoders produce clicks.
> 2/ The Main encoder produces clicks also in the SUB rx and vice versa.
> 3/ SHIFT/LO and HI/WIDTH controls also produce clicks.
>
> DSP helps and ofcourse it doesn't ultimately interfere with a qso. I've only
> noticed this since using 10m and then not all the time and I've yet to
> double check the mechanics/wiring inside the radio.
>
> 73,
>
> Stewart Rolfe, GW0ETF
>
> K3 #145 (V3.19 and pretty well modded up to date)
>
>
> wayne burdick wrote:
>   
>> John,
>>
>> I've noted your report of VFO tuning noise on 10 m, and will look into  
>> it further when I get back from vacation. Sounds like re-radiation of  
>> SPI bus tuning data, and this could be frequency specific. It might  
>> also vary with the type of antenna, ground, and other I/O devices  
>> connected to the rig. Usually atmospheric noise masks any digital  
>> switching noise, which is typically at an extremely low level.
>>
>>
>>
>>     
>
>