For proportional crankup tower lift systems, I have successfully used angle
stops added to the top section just below the rotor plate. The stops
prevent the top section (only) from nesting the rotor so that just the rotor
is exposed when the tower is fully retracted - makes servicing a snap. Be
sure the stops are sufficient strength to safely support the weight of the
top section, rotor, and antenna array (structural steel angle - not angle
brackets from the local hardware store).
FYI - this will not work if your crank-ups have positive pull down cable
systems - at least the ones I am familiar with.
73
Matt
KM5VI
-----Original Message-----
From: towertalk-bounces@contesting.com
[mailto:towertalk-bounces@contesting.com] On Behalf Of Dan Hearn
Sent: Tuesday, November 29, 2011 11:44 AM
To: towertalk reflector
Subject: [TowerTalk] Crankup towers
I have several UST crankup towers. As they extend, all sections extend
proportionally. Do some other brands of towers extend each section
completely before the next section extends? That would sure make it easier
to access the rotor for replacement.
--
Dan Hearn
N5AR
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