[ARC5] Help with tuning knob ideas for ARC-5 receiver

[Neil]

> What do I need in order  to replace that cable with a regular knob


The very first ARC-5 receiver I bought in 1965 had a brass pipe
fitting (like those found in car fuel lines) screwed onto the threaded
chassis connector. The threads were a perfect match, so there
are compatible threads out there guys.
The pipe fitting had a quarter inch hole thru which passed a quarter
inch brass shaft extension of the usual ham type.
The grub screw was not used and was not present. The female
end of the shaft extension had been filled with solder in such a way
that it could slide onto the spline and rotate it.
It looked like the constructor of this device had heated the female
end of the extension shaft and filled it with solder, then pressed it
up onto the spline while the ARC-5 was held vertically with face
down and the solder still hot. After waiting for the solder to cool,
the brass pipe fitting was passed along the coupling and screwed
on. Its function was to stop the extension sliding off the spline, and
support it whenever there was perpendicular hand movement on the
knob.
The solder could have been easily renewed if it showed signs of
wear, although it showed no such wear for me even after several
years of tuning up & down 80m.
Of course, the quarter inch hole thru the fitting may have been
drilled out from some smaller diameter, so you don't have to look
for an exact match.

73 de Neil ZL1ANM