Why not slip a smaller diameter tube inside the boom and make a coupling
joint clamping it with four bolts to eliminate the boom to mast clamp.
John
----- Original Message -----
From: "Jon Zaimes AA1K" <jon.zaimes@dol.net>
To: <towertalk@contesting.com>
Sent: Wednesday, September 04, 2002 11:36 AM
Subject: [Towertalk] Hy-Gain Explorer 7-3, Ring Rotor questions
One of my top boom support cables on a Hy-Gain Explorer 7-3 snapped. These
four cables are attached on the director and reflector elements, 10 inches
out from the center of the boom.
The manual specifies these be attached to the mast 5 feet above the boom.
They are steel -- I'm not sure if it is stainless or galvanized -- without
insulators.
If the mast connection point is higher or lower than 5 feet, will this
affect the tuning of the elements?
If the cable is changed to a nonconductive material (such as Phillystran),
will this affect the tuning of the elements?
Also, I am getting ready to mount this beam on a TIC 1022 Ring Rotor (on
Rohn 45, where it has been fix-mounted toward Europe). Since the Hy-Gain
boom-to-mast bracket also serves as the coupling for the boom, I am
planning to use some spacers (likely treated wood) to keep the boom high
enough off the ring-rotor cradle so the bracket clears the cradle. The
boom-to-mast bracket will also then be used to support a 5-foot mast to
which the boom support cables will be attached.
If anyone has used this type of mount, or has other thoughts on mounting
this beam on a Ring Rotor, I wuold appreciate your ideas.
73/Jon AA1K
Delaware
_______________________________________________
Self Supporting Towers, Wireless Weather Stations, see web site:
http://www.mscomputer.com
Call 888-333-9041 to place your order, mention you saw this ad and take an
additional 5 percent off
any weather station price.
_______________________________________________
Towertalk mailing list
Towertalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|