[TowerTalk] PST2051D

john at kk9a.com john at kk9a.com
Wed Nov 20 10:13:03 EST 2013

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 at contesting.com
Subject:	 [TowerTalk] PST2051D
From:	 Vojtech Ritzko <om8aw at yahoo.com>
Date:	 Wed, 20 Nov 2013 01:50:01 -0800 (PST)
List-post:	 <towertalk at contesting.com">mailto:towertalk at 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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