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            ANTENNA PRODUCTS CORPORATION LPH-27

            GENERAL DESCRIPTION


            ROTATABLE, HORIZONTAL POLARIZATION, LOG PERIODIC, HIGH POWER - LPH-27

            photo Antenna Products Corporation LPH-27 Applications

            The LPH-27 is well suited for medium range sky wave circuits.

            Features

            The LPH-27 is a broadband, log periodic antenna which is steerable in azimuth. The array is tilted with respect to ground to provide slowly varying elevation patterns with frequency.

            Characteristics

            The array is mounted on top of a 50-foot selfsupporting tower. The front (higher frequency end) of the antenna is 30 feet above ground. The array is inclined at an angle of 22° with respect to the horizontal. The HF antenna array consists of the main support structure (boom) twenty tapered tubular elements, a twin feedline, and a transformer. The boom is an all-aluminum tower section laced with tubular diagonal braces and assembled with high-strength galvanized steel hardware. The twenty elements varying in length log-periodically, are all-aluminum tapered tubes. The rotator is mounted near the top of the tower with work platforms provided for easy maintenance. The input impedance of the antenna is 80 ohm. A transformer is used to match this impedance to 50 ohm. A rotary joint allows continuous rotation.

            Equipment Supplied

            Antenna array, mast, antenna drive, self-supporting tower, ground hardware, remote control, and erection kit (less winch).

            Optional Equipment

            Obstruction lights, climbing devices, and winch. Coaxial cable, connector adapters and mating adapters. Computer controller with RS-232 interface.

            TECHNICAL SPECIFICATIONS
            MODEL
            LPH-27A LPH-27B LPH-27C
            Frequency Range
            4 - 30 MHz 4 - 22 MHz 4 - 30 MHz
            Power
            Receive 50 kW carrier
            75 kW avg.
            200 kW PEP
            25 kW avg.
            50 kW PEP
            Input Connector
            1-5/8" EIA 6-1/8" EIA 3-1/8" EIA
            Gain
            9.5 dBi @ 4 MHz, 12 dBi @ 12 MHz
            Back and Side Lobe
            15 dB minimum
            Input Impedance
            50 ohm unbalanced
            Azimuth Beam Width
            Nominally 65° at half
            VSWR
            2:1 maximum
            Wind Loading
            120 mph or 80 mph with 1/4" ice
            Maximum Height
            73 ft
            Boom Length
            118 ft
            Longest Element
            124 ft
            Tuning Radius
            72 ft
            Shipping Wt (lbs) 14,000
            Shipping Vol (cu ft) 800
            Specifications may change without notice

            AZIMUTH RADIATION PATTERNS
            Antenna Products Corporation LPH-27 azimuth radiation patterns


            ELEVATION RADIATION PATTERNS
            Antenna Products Corporation LPH-27 elevation radiation patterns
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