I would rather have the mast twist a bit then have the rotor destroyed.
My rapidly failing memory....I can remember all the most insignificant
stuff in the world, thinks someone once made a plate with ridges on it
that helped. It you pin it use a shear pin. You can get them at
tractor stores they use them in all the PTO lines.
W0MU
On 4/30/2024 4:05 PM, Don Tucker wrote:
Appreciate all the ideas, especially use of the simple muffler
clamp(s) for holding the mast from slipping back down. I had looked at
a 2-piece 2-inch shaft collar at $12 plus shipping, but it was blue
oxide carbon steel, here on the coast a no no (and I want to leave it
on the mast). Found a SS version for just a bit less than 3X the
regular steel price, but still a lot more expensive than muffler
clamps, (but couldn't leave the muffler clamp in place).
Since I only need about 6 inches of rise it looks like a small
hydraulic jack or similar might work, will need to look again at
clearances.
Yes, to get to the rotator, the inner section must be held out when
the tower sections are lowered. I've some steel to put through the
section and can secure it (even though the down weight forces of the
section/mast/rotator/beams will be more than enough to keep the cross
piece from slipping). This is the only downside I have re crankups,
rotator access.
Questions - what's the general feeling about pining the mast to the
rotator? I've done both over the last near 70 years. Is there a better
rotator mast clamp than what comes with the T2X's (I do shim as
necessary)? Our _peak_ winds in the winter rarely exceed 90 MPH and
over the last 23 years average at 70 max.
I own the the original HyGain electric tower raising package for the
HG-70HD, but have never broken it out of the boxes. 500 cranks up and
500 down, good for the soul (and arms). The home-built tilt over
fixture modeled on the TRX-80 is a 4 pulley system so it takes awhile
to see action when tilting. That I would like to motorize - at 88 my
cranking stamina is someone diminished!!!
Great ideas on so many topics from all the TowerTalk users. Tnx folks!
Don W7WLL
On 4/30/2024 7:27 AM, Mike Fatchett W0MU wrote:
Excellent point! Something I do out of habit but failed to describe.
W0MU
On 4/30/2024 1:12 AM, Leeson wrote:
Please be sure to use redundant means of supporting the mast and
antennas. There was an frightening accident a number of years ago
when the bolts on a thrust bearing holding a mast snapped and it
fell back down, trapping the climber by the hands. Don't let this
happen to you! For example, use an extra muffler clamp or two on the
mast at the tower top to secure it.
Dave W6NL
On 4/29/24 4:59 PM, Mike Fatchett W0MU wrote:
You should be able to secure the mast and tie back to the tower in
3 places holding it in place. You must have the tower cranked up
enough to access the rotor. pull the plate holding the mast,
remove rotor and rotor plate if needed. Reverse to put in.
Alternatively rent a crane or a man life. You can also crank up the
mast if you have the rotor out with a bottle jack or clamp a come
along end to the mast and tie the other end above and crank away.
All much easier on a Rohn tower with bearing.
W0MU Mike
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