[Elecraft] PAR End Fed Half Wave antenna

[Bill W4ZV]

Joe W2KJ wrote:
> 
> I've been using two PAR EFHW (End Fed Half Wave) antennas in portable ops 
> for several weeks now with excellent results.
> 
> I have the 20/40M and the 10/20/40M antennas that I use at the local park.
> 
> What I like about these antennas, besides the fact that they work very
> well 
> indeed, is that no transmission or support rope is required.
> 
> I get one end up in the air using the monofilament line on my wrist rocket 
> and tape the match box end to my operating table....a short coax jumper 
> cable to my K2 or KX1 completes the installation.
> 
> Using the monofilament on the wrist rocket to support one end of the
> antenna 
> obviates the need for a support rope of some kind so this along with the 
> transmission line is eliminated.
> 
> These end fed half waves appear to be ideal for backpacking ops since they 
> eliminate a lot of weight and bulk.
> 
> I also have played with an 88ft center fed doublet fed with 450 ohm ladder 
> line and this has also been an excellent portable antenna, although it 
> requires a transmission line and antenna tuner and at least one support
> rope 
> in the center and two shorter lines for the ends.
> 
> What is really neat about the PAR EFHW's is that once pruned and tuned no 
> antenna tuner is required so even more weight and bulk is eliminated for
> the 
> portable operator.
> 
> The PAR 10/20/40M job provides 3 bands of operation with no tuner, 
> transmission line or support rope...not too shabby.
> 

I just wanted to clarify a couple of things Joe said.  I've also had good
luck with the PAR End-Fedz EF-20/40 (now EF-10/20/40)  for portable QRP use. 
IMPORTANT NOTE:  The multi-band PAR antennas are rated at 25 Watts
only...but the mono-band antennas are rated at 100-300 Watts depending on
band, etc:

http://parelectronics.com/end_fedz.htm

Indeed it's easy to construct a monoband version of this antenna using
AA5TB's link below, but I liked the idea of a **multi-band** unit that
didn't require an ATU for my ultralight ATS-3 QRP backpacking setup (<8
ounces for everything - rig, antenna, paddle, battery, earphones).  I'm not
sure how the match for the PAR multi-band unit works but it definitely
performs very well.

http://www.aa5tb.com/efha.html

Dale Par W4OP is extremely responsive and all his products are top quality
(I also have one of his BCST-HPF filters for eliminating BC overload on
160).

73,  Bill  W4ZV




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