Elecraft K2 Owner's Manual - Manual (Page 34)

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LECRAFT ® 33
Open the K2 Encoder Assembly Kit (K2ENCASY) and follow
the instructions included with it to install the encoder.
Set all potentiometers to midway in their rotation.
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In the next step, a small knob may fit too tightly onto its
potentiometer shaft. If so, rotate the shaft until it bumps up against one
of its stops, place the knob at the top of the shaft, and rotate it slowly
in the same direction while gently pressing it down.
Attach small knobs to the potentiometer shafts, starting with the
KEYER and POWER controls. Each knob's two set screws can be
tightened using the small Allen wrench (.050", 1.3 mm). The knobs
should be mounted as close as possible to the panel without touching
it. Align the pointers per panel labeling.
Locate the 1" (25 mm) dia. by 1/16" (1.6 mm) thick felt washer,
and place it over the encoder nut (Figure 5-19). The washer should be
seated on the front panel, with the nut inside it.
Figure 5-18
Place the large knob on the encoder shaft. Push the knob on until
it just touches the felt washer. If the knob does not spin freely, move it
out slightly. If the knob is not contacting the felt washer at all, it may
"drift" slightly once it stops spinning.
Using the larger Allen wrench (5/64", 2 mm), tighten the two set
screws alternately, in small increments.
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At this point, the pushbutton switches may not all protrude an
equal distance. The switch height will become equalized once the front
panel assembly is mated to the RF board in a later step.