These filters are normally supplied with N Female connectors but can be
ordered with BNC connectors and SO-239 UHF connectors.
All the filters are supplied in Hermitically sealed Metal cases designed
for tough applications.
They resist shock, vibration, high and low temperature extremes, salt,
sand, dust and leakage.
The filters were designed to meet applicable requirements of
MIL-STD-810E (Environmental test Methods) and
MIL-F-14072D (Finishes for ground based Equipment) that are listed to
the right.
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ENVIRONMENTAL
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ALTITUDE: METHOD 500 3, PROCEDURE 1, 11, AND
III TEST ALTITUDE FOR PROCEDURE III IS 4,570 METERS AT 57 2 kPa. |
HIGH TEMPERATURE: METHOD 501-3, PROCEDURE I TO +70 C
NON-OPERATING, AND PROCEDURE 11 TO +60'C OPERATING. |
LOW TEMPERATURE: METHOD 502.3, PROCEDURE I TO -51 C
NON-OPERATING, AND PROCEDURE 11 TO -40"C
OPERATING. |
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TEMPERATURE SHOCK: METHOD 503.3, LOW TEMPERATURE -51 "C AND HIGH TEMP. +48"C. |
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SOLAR RADIATION: METHOD 505.3, PROCEDURE 1, HOT-DRY TEMPERATURE
CONDITIONS |
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RAIN: METHOD 506.3, PROCEDURE I |
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HUMIDITY: METHOD 507.3, PROCEDURE 111. |
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FUNGUS: METHOD 508.4. |
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SALT FOG: METHOD 509 3, PROCEDURE I |
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SAND AND DUST: METHOD 510 3 PROCEDURE I AND 11 |
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LEAKAGE (IMMERSION): METHOD 512.3, PROCEDURE 1, 2 HOURS AT 1.0 METER |
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VIBRATION: METHOD 514 4, CATEGORIES 1, 3 AND 8 (TABLE 514 4-AIII) |
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SHOCK: METHOD 516.4, PROCEDURE 1, V, AND VI. |
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ICING/FREEZING RAIN: METHOD 521.1. |
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These
High-Power High Performance Lowpass Filters were
designed for
Mobile and Fixed base High- frequency (HF) Radio Transmitters in the
100-to-10-metre wavelength Band. Much of the HF band (3 MHz to 30 MHz)
is allocated to mobile and fixed voice communication services that
require reduction in harmonic content from their transmitters.
International (shortwave radio) broadcasting is also conducted in the HF
band and has similar harmonic reduction requirements.
