Quote:
Originally Posted by Ret10Echo
A definite challenge having an ALE net that has stations at varying distances. It becomes a challenge to build an antenna that will meet multiple frequency requirements. Most of those fixed stations will have a multiband array of some size. Not so easily reproduced by the tactical operator.
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I'm pretty sure I understand what you are saying here... at least the basic gist.
As it applies to the COMMEX that we are planning, this will be an HF link between two fixed stations, both using PRC-150's, and more than likely both using a field expedient antenna system.
MY admittedly limited understanding is that the issue of using a fixed length tactical antenna in a multiple frequency application is at least partially overcome by the internal tuning coupler in the 150. What I have been taught is that the tuning coupler is capable of electronically shortening the antenna length (but not lengthening), so a good compromise expedient antenna is a 1/4 wavelength of your lowest planned frequency (in this case, about 75', 1/4 wavelength for appx. 3 Mhz).
Again, my limited understanding is that the advantages of an ALE net outweigh the possible disadvantages of using one fixed length antenna for multiple frequencies.
I look forward to hearing some corrections or further enlightenment on the subject.