system-install

The PR-422 is an Active Extra High Performance Omni-directional wide-band Terrestiral AM-SW-FM/DAB+ TV Antenna ( 0.1-30 and 40-860 MHz ) for Maritime use where second rate efficiency is unacceptable.

The PR-422 is designed for High End Commercial and Military vessels and is based on a configuration of 3 circular dipoles (one is a special flexable printed circuit) coupled to 3 parallel amplifiers (7 transistors) via a separate broadband filter network. Maximum performance is assured through use of a newly designed set of elements and the extensive use of a Network Analyzer in the initial design and in the final construction and tuning of each unit. Microwave transistors provide needed gain with a minimum of internally generated noise.
Careful engineering and the use of very high quality temperature compensating components yields excellent intermod performance and sharp hand tuned filters greatly reduce the chance of interferrence from outside of the TV bands.

This compact and robust antenna incorporates a shell made of thick UV-ABS plastic which is injected with polyurethane foam to protect the elements and EMI sheilded internal amplifier. The mounting base is cast from Almag Marine Aluminum Alloy which is Shot Peened for extra strength. Mounting hardware is made of stainless acid-proof steel. The Shielded Low Noise Amplifier is protected from static charges and is removable for field repair or replacement.

The PR-422 is at the head of a new 4000 Series Marine Cassette Amplifier System with ground isolated distribution passives introduced in 1998. The Series 4000 is the result of painstaking engineering and the use of state of the art components including high performance GaAs Hetrerojunction Bipolar Transistors and MMIC devices.