The OB4-40 is a fantastic antenna choice. Do not skimp on the rotator. The
K7NV prop pitch would be a great rotator for your application.
John KK9A
To: towertalk@contesting.com
Subject: [TowerTalk] PST2051D
From: Vojtech Ritzko <om8aw@yahoo.com>
Date: Wed, 20 Nov 2013 01:50:01 -0800 (PST)
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>
HI folks
I need your expertise
I am planning the rotor setup for OB4-40 (coil loaded 40m 4el yagi)
OB4-40 has wind load at 130 km/h = 1.200 N / 1,49 m² / 16,2 feet²/
There will be mast bearings help to minimize vertical load and bending moment
from an antenna to rotator.
I like to use The BIG BOY model PST2051 .
PST2051 is rated @ 23.4 sq. ft. - wind load area (sq. ft.). (2.5m2)
What is your experience with this rotor ???
VY 73 DX
Bela OM8AW
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