marcelocx2dk at gmail.com
Wed Nov 20 07:34:56 EST 2013
About the OB4-40... heavy antenna!
If you install an OB4-40, you need at least PST 61 or 71
The 2051 is too small for this beast!!!
This was the recommendation from OB owner, Tom.
73 and good luck!
2013/11/20 Vojtech Ritzko <om8aw at yahoo.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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