[Elecraft] K3 VFO Tuning noise reduction

[Eric Swartz - WA6HHQ, Elecraft]

Yes, you absolutely must make the h/w mod for the diode/resistor change 
if you enable the tuning mod in the K3 menu. If you do not make the h/e 
change, and then enable this feature in the menu, there may be 
intermittent synthesizer communication failures in your radio (which 
could be temperature dependent etc.)

73, Eric  WA6HHQ


James Sarte wrote:
> I had a tuning noise issue on 60m, but nothing noticeable anywhere else.  Is
> the hardware mod really necessary if the firmware successfully suppresses
> the encoder noise?  When I have SPI2 on in firmware, it totally eliminates
> all ticking noise previously heard around 5MHz.  It would seem to me that
> unless the firmware can't remove the noise alone, then the hardware mod is
> unnecessary? 
>
> 73 de James K2QI
>