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From: Bill Aitchison ZL2AXH
Date: 12 May 2003
Time: 22:13:07
Remote Name: 192.206.154.2
I am using a commercially manufactured (but source unknown) antenna for emergency purposed when travelling on foot in the bush. To all intents and purposes it is an end fed long wire counterpoise terminated antenna. It is grounded at one side of the 4:1 balun and the antenna consists of 16 metres of conductor and 16 metres of resistance wire which forms the combined termination resistor and counterpoise. The point that interests me is that it works pretty effectively (as an emergency deployed antenna) over the frequency rage 2-30 MHz with an SWR typically less than 2:1. However, if we count the first 16 metres as radiator it is nowhere near long enough do be described as a "long Wire" at 2-8 MHz (which is where I use it most). It is normally strung out over bush at 1-3 metres high and seems to be pretty omnidirectional up to 6 MHz and then shows increasing tendency for directivity on higher frequencies (i.e. the higher the frequency the more it looks like a long wire. I would be interested in any feedback that anyone has on the technical aspects of a "short long wire".