[Elecraft] K3 VFO tuning hash

[GW0ETF]

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.
> 
> 
> 

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