Making a special knob for tuning the DDS in a handheld transceiver
Here is a
special aluminium side-knob I made on the lathe, which is intended to
tune the DDS on a handheld transceiver. The knob allows tuning the DDS
from the side of the transceiver, using just one hand. The knurled side
of the knob will extend out of the transceiver enclosure both from the
top and from the side, so that the knob can be rotated conveniently by
the thumb finger.
wanted the option to be able to tune the DDS from the face of the
transceiver, so a hole has been made on the knob for the rotary encoder
shaft to pass through it and extend from it. On tis extended shaft,
another plastic knob would be fitted, which would be placed at the face
of the transceiver. A small hole was tapped, so that a screw could keep
the knob firm onto the rotary encoder shaft. Here are some pictures of
the finished knob.
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