[Elecraft] [K2] Replacing tuning knob with one from Ten-Tec

[Paul Saville]

I have a heavy-ish 73crc knob on my K2, and I prefer the feel with the
felt washer completely removed. It doesn't drift when bumped although it
could be that I have an especially stiff encoder. The finger dimple is
too small for my stubby finger, so I stuck an Elecraft-supplied finger
dimple over the top, making it a bit of a Frankenstein knob. So far the
encoder shaft remains unbent, touch wood.

73 de Paul ZL3IN

On 27/05/2011 11:13 a.m., Don Wilhelm wrote:
> I cannot say for certain because I have not seen the knob.
> I do have a concern for knobs that are heavy and do not fit properly 
> against the felt washer.
> For one thing, the heavier knob spaced out from the front panel will put 
> extra downward stress on the encoder shaft - that is canceled out if the 
> new knob is in full contact with the felt washer.  A bent encoder shaft 
> will create binds when tuning.
> Secondly, a knob with no slight friction will allow the VFO to drift 
> when you tap on the operating table or just "breathe" on the knob.  You 
> must have some friction on the knob for the VFO to be stable.