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Did you order DB224-A (150-160MHz) or 224-E (140-150MHz) range models? The
harnesses on the antennas are for their proper range....the harness between the two antennas can be easily made up of 75 ohm RG11 coax cut in ODD multiples of 1/4wavelength (taking Velocity Factor into account!). The lengths would be the same on each side of the T to the 224 feedpoints. Easy to do....the harnesses on the antennas are made to match 100ohm elements down to a single 50 ohm point.....but as long as both antennas are the same range, you only need to worry about the harness between the separate 224s Chris WB5ITT Don Winn wrote: I would like to install two Andrew DB224 4-element colinear antennas as a DB228 (8 element). When the antennas were ordered to replace a Celwave P654, I was told that two 224 and and the proper phasing harness would be the same. The antennas and harness were ordered but I have a problem. The antennas were shipped but I'm now told the phasing harness for the amateur frequencies (-007) is no longer available. I have received some information on the phasing harness but from the drawings provided, the two outputs are not the same length therefore will not be in phase. Since the antennas are the same, wouldn't the two outputs of the phasing harness be in or is it normal to provide some downward tilt. Unless I'm badly mistaken,the antenna element should be fed in-phase giving maximun gain in the horz.direction. Don AF4Z |
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