[ARC5] ATC/ART-13 Maintenance Autotune Crank

[Mike Hanz]

Under the "tilting at windmills" rubric, I thought perhaps a web page 
dedicated to the lovely and popular ATC/ART-13 maintenance autotune 
crank might be in order.  If one has a home machine shop or friend with 
one, they could easily make it from the fabrication drawings I sketched 
up from an original crank (grateful thanks to AB5S) at 
http://aafradio.org/garajmahal/ART-13_lineshaft_crank.html

I've made a couple of them for friends (out of stainless steel rather 
than the original Type I cadmium plated steel because I prefer the look 
and feel of stainless), and they aren't difficult to make.  It's a nice 
Saturday morning project.  I added a knurled thumbscrew with a 4-40 
thread to make it easier to attach to the end of the line shaft.  It 
eliminates twiddling with a screwdriver, though not the danger of loss 
through Murphy's efforts.  I keep it tied to the crank with a nut when 
I'm not using the crank.  That way only the nut gets lost when you're 
using it....:-)

73 and Happy Easter,
  - Mike   KC4TOS