[Elecraft] Source for K3 weighted knobs

[Don Wilhelm]

Neil,

First, the K3 knob(s) will not fit the shaft of the older encoder on the 
K2.  If the K2 was built quite recently (or has had the encoder changed 
to the new one), then the K3 knob(s) will fit.

I would suggest the K3 VFO B knob for those newer K2s - the VFO A knob 
is too large and its diameter interferes with the display plastic.  You 
would have to add substantial thickness to the felt washer to provide a 
bit of drag on the knob.

Know that the K2 knob is weighted, but its weight is not as heavy as the 
CNC knobs that have been offered.

My gut feeling is that one reason that those heavy knobs are used is to 
allow giving the knob a spin to make large QSY excursions.  The problem 
with that is with a free-spinning knob, the knob may move after it is 
stopped, so the frequency you thought you stopped at will be changed 
when you lift your fingers from the knob.  I have had several K2s sent 
to me for repair that had no drag on the knob, and part of the reason 
for sending the K2 for repair was that "the K2 drifts".
There must be some drag on the knob if this "drift" is to be avoided.

Lastly, if you install a heavy knob and then ship your radio for any 
reason, you should remove the knob to assure that the encoder shaft will 
not be damaged during shipment.

73,
Don W3FPR

On 1/17/2017 6:11 PM, Niel Skousen wrote:
> Has anyone used the K3s knob on a K2 ?
>
> Does it fit, how do you like it ??
>