I have an old track ball that has a 1.75 ball in a 5 x 5.5 base that I think
is what you are trying to build. If it is not about saving money, Kensington
makes two models that should do the trick. Newegg has them. Models 64325 and
K7232US
David K0LUM
On Jan 17, 2013, at 6:07 AM, Bill Clarke wrote:
I have found a cheap and effective answer to the problem that requires no
changes to the K3 and no soft in addition to the free version of HRD that I
am using.
I took a mouse apart and removed the opto-wheel's detent spring. The wheel
now spins freely. Although the diameter is small compared to a real tuning
knob - I can control the tuning speed from HRD. Works for me.
At some point in the future, I may take another mouse apart and remove the
optical encoder and build a new frame and enclosure for it - then add a
real sized tuning knob to same. However, having the smooth tuning
capability along with right and left clicks of the mouse is really convenient.
Bill W2BLC
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