Hi Andy,
First off, does the whole knob need to be 2 " diam.? ie.
would a disc attached to an "ordinary size knob do the trick?
Failing that, you can make perfectly servicable knobs from the smaller
size coffee jar lids. Cannabalize a small knob for the brass insert to
fit the shaft. Centre this accurately in the lid and glue into place
with araldite. You can fill the remaining space with David's Isopon
paste ( cheaper than araldite ). This will add weight for a VFO dial. If
you don't have the brass fiitings and your shafts have flats on them you
can caste the paste around a greased sfhaft & then cross drill to take a
pinch bolt. Threads can be cut in isopon if you are careful.
The hardest job will be finding the centre of the lid -- you
need to carefully apply some basic geometry. If you don't like the brown
colour, be careful with the paint you apply as most of these lids are
moulded from a polystyrene based polymer, which dissolves in most
organic solvents.
That's assuming you don't have access to a lathe. If you do
just turn siome pieces of wood etc and paint them!
de John G8SEQ.
Andy - GM0NWI wrote:
Hello to everyone in the group from "Bonnie Scotland"..
I am currently tryin' to source some 2 inch - 2 1/4 inch diameter knobs for
a project that will be gettin' undertaken in
The near future..
Has anyone in the past home-brewed this size and diameter of knob for a past
project..? If so, care to share how you
Did it..?
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