We received an email from Mike Goldwater, Barry's son, concerning Barry's
Hy-Gain RP-75H rotating pole. Barry had an agreement with his neighbors,
that upon his demise, the antennas and rotating pole would be removed from
the property. If anyone would like to obtain the rotating pole (and the
pole's base embedded in concrete), please contact Mike Goldwater at
<mg@getnet.com>.
Specifications of the standard Hy-Gain RP-75:
Mast -
Total Height: 77' above ground
Number of Sections: 3 (25' each)
Material: Cold rolled steel (min 48 kpsi)
Wall thickness: 0.120" top section, 0.180" middle, 0.250" bottom
Diameter: 13" bottom, 3" top
Mounting flange: 18.5" square
Base-
Length: 10'
Material: steel
Outer cylinder wall thickness: 0.250"
Inner cylinder wall thickness: 0.375"
Outer cylinder diameter: 16"
Inner cylinder diameter: 14"
Horizontal thrust bearings: Nylatron strip, 3" wide, backed by Oilite
bronze bearing
Vertical Thrust bearing: Triple sealed ball bearing - 6" diameter
RBX-5 Rotating system-
Dimensions: 22" x 15" x 12.75" high
Rotating torque: 36,000 inch-pounds min.
Braking torque: 100,000 inch-pounds min.
Mast rotation: 1/4 RPM (1/2 RPM optional)
Op. Temp: -20 to +120 degr. F
Rotating Drive: Gear and dual chain system
Rotator Motor: 1/4 HP electric, continuous duty, 105/125 volts, 49/61 Hz,
single phase
Motor windings: reversible, series wound, with starting winding
Total motor reduction: 7200:1
Motor op current: 4.2 A
Motor Power: 483 watts
Data Output: Selsyn
Control Unit: included
This system was installed in the mid 60's, and was used extensively for
phone-patch traffic during the Vietnam War. I don't know what
modifications were made to this unit compared to the commercial product
which was also available at that time.
73 Roger WB0DGF
Telex Communications, Inc.
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