For DC motor rotators a couple of microswitches (rated IP65 or better)
in the power line, bridged with diodes that conduct in the direction
away from the stop point are my backstop for blowing past soft limits.
Bridge the diodes with TVS diodes or MOVs to help with the motor kick.
?? for AC motor rotators.
Grant KZ1W
On 6/5/2020 14:41, Robert Harmon wrote:
Dumb question. When using the swinging gate, how do you make sure when the
rotator swings it around it won't hit the tower ?
Bob
K6UJ
On Jun 5, 2020, at 1:52 PM, Grant Saviers <grants2@pacbell.net> wrote:
I have a Rohn 65 design in CAD, never built it, went with rings instead. Should have done the
arms. All 1/4" HRS steel plate, standard angles and channel, plus 2" NPT pipe, although
other tube/pipe choices are easy. Different leg diameters depend on the u-bolt size (minor hole
location change needed). Designed for hot dip galvanizing. I designed for two antennas for up to
20' of pipe between top bearing and rotator. Or one antenna on a short pivot "mast". Uses
a standard mount rotator at the bottom (my plan was Orion 2800) and a UHMW bearing at the top.
Make the plates on a laser or waterjet cutter. Weld it up and HDG.
Reply off list and I well send 3D pdf's to review. Enough interest and some
weld shop might make them. Everything should UPS except the pipe, buy it
locally. Adding tabs and slots to the top and bottom supports for self
fixturing of the welding would be nice.
Grant KZ1W
On 6/5/2020 11:46, Jon Zaimes via TowerTalk wrote:
Try here: http://www.w9iix.com/ii00012.htm
Jon P. Zaimes, AA1K
Tower climber for hire
Website: aa1k.us
Cell: 302-632-2353
Email: jz73@verizon.net
Hug your favorite tower every day, and always stay connected to it
On Friday, June 5, 2020 mike stokes <mike9v@gmail.com> wrote:
I am looking for one as well. Please reply to the list.
73
Mike
KK9V
On Fri, Jun 5, 2020 at 2:20 PM Ignacy Misztal <no9e@arrl.net> wrote:
Does anybody make swinging gate mounts? I need one for 45G.
Ignacy, NO9E
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