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The company was one of the earliest pioneers of community antenna television systems (cable television). The company headquarters was located at 401 Walnut Street in Philadelphia, Pennsylvania. Shapp sold the company to General Instrument in 1967. However, the Jerrold brand name continued to be used on equipment into the 1990s. [citation needed]
Crowded mast with TMAs (white rectangular boxes) mounted behind all the panel (rectangular) antennas. A Tower Mounted Amplifier (TMA), or Mast Head Amplifier (MHA), is a low-noise amplifier (LNA) mounted as close as practical to the antenna in mobile masts or base transceiver stations.
A RF/antenna output, if present on a converter box, is usually just a passthrough ("LOOP OUT" which does not provide the box's output signal, but only provides the raw antenna input signal to watch analog channels via a TV set's tuner if analog broadcasts have not ended yet or to connect another capable device to the same antenna feed) because ...
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Yagi antenna for UHF TV reception with 22 parasitic elements; 4 reflectors attached to the vertical bracket at left, and 18 directors attached to the horizontal beam at right. The driven element is attached to the black box next to the reflectors. The antenna is most sensitive to radio waves coming from the right, parallel to the antenna's axis.
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The system had 120 high band antennas and 40 low band antennas which had to be positioned within +/- two minutes of arc and +/- 3 inches of their intended distance from the center of the array. 160 75 ohm coaxial transmission lines were used to carry signals from the antennas had to be electrically matched to within 3/4 of a degree at 10 MHz.
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related to: magnadyne antenna boxebay.com has been visited by 1M+ users in the past month
temu.com has been visited by 1M+ users in the past month