Yes it kinda does <LOL>
73
Roger (K8RI)
On 6/1/2016 Wednesday 7:38 PM, Bob K6UJ wrote:
wow Roger,
Reminds me of the movie Crocodile Dundy.
"You call that a knife (rotator) now here's a knife (rotator)"
Bob
K6UJ
On 6/1/16 4:11 PM, Roger (K8RI) on TT wrote:
Here's a home built, chain drive that might turn your whole house.
He used it to tun the top section of a massive tower that could be
seen from 10 to 12 miles.Top two photos on
http://www.rogerhalstead.com/ham_files/skyhook.htm the whole drive
is not shown, but what is shown should give a good idea as to the
size. Definitely not a bicycle chain! I think he used two heavy chains.
John's station looks dated, but the photo was shot around 2001.
Industrial chain, gears and idlers can be found at on-line auctions.
I purchase a chain and gears for a planned, but much smaller scale
drive that has never materialized...as of yet and probably never
will. The cost was surprisingly little.
There is "no slack" in this system so be sure to use a heavy (strong)
spring loaded idler to protect the system and particularly the chain.
OTOH if the chain is not "tight" to allow some slack, the shock to
the antennas, chain and motor gear reduction can be substantial.
John built that entire tower with the help of his brother-in-law and
it was on a city lot.
IIRC John died just two years after getting the system operational.
His family put the tower up for sale, then on e-bay. It could be had
for taking it down, but they eventually gave it to a power company
for taking it down.
The cost? In the Year 2000, you could have purchased a new Corvette
for just the cost of the materials..
73
Roger (K8RI)
On 6/1/2016 Wednesday 3:22 PM, Danny Pease wrote:
I have been intrigued with putting together my own antenna mast
rotation
system and wondered if anyone has any info on using a rack and
pinion gear
type system in conjunction with a linear actuator. If the rack and
pinion
turns out to be too expensive, my second choice would be a chain
drive with
the linear actuator.
Thoughts?
Danny NG9R
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73
Roger (K8RI)
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