[TowerTalk] PST51 at top of 72' Trylon

[Phil Duff]

At 20:02 4/17/00 -0700, Bob Wruble wrote:

>ps:  the best up till now has been a properly interfaced
>prop pitch motor...w7ej finally came up with a good interface to rotate
>his 80m yagi the entailed a splined shaft mechanism....b4 that he tore
>up a number of other approches including a r-45 rotor shelf one.....
>the wind actually twisted the ears off the shelf but the prop pitch motor
>and shaft survived!!  the big dwn side to prop pitch motors is the cntrler
>design and interface but thats a story for another time!

The Orion mast clamps are VERY robust and I think there is an even
heavier duty set available if I recall my conversation with Mike Stahl.
M2 will attach the Orion clamps to a prop-pitch if you send it to them.

And as for a prop-pitch controller, a very nice solution is the M2 RC2800P-A
controller.  It incorporates the prop-pitch power supply, digital display, 
10 preset
memories, RS-232 control, and needs only 5 wires to the prop-pitch - 3 for the
p-p motor and a pair (or better yet RG-58 coax) for the magnetic pulse 
switch that
is attached to the bottom of the prop-pitch motor.

73 de Phil NA4M

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Phil Duff NA4M     na4m@texas.net   Georgetown, Texas  


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