Decided to do a little antenna experimenting – I’ve long wondered what I could do with very portable antenna for traveling. As far as I know the TSA shouldn’t be too upset if I have one of these in my carry on, but then you never know…..
HF EndFedz® (Patent Pending)
The UV resistant ABS plastic housing encloses an efficient matching network allowing the antenna to be fed with common 50 ohm coaxial cable.
All hardware is stainless and the SO-239 connector is silver/teflon.
The radiator wire is custom made for us in 21 mile runs.
It is a #18 gauge stranded copperweld with a tough polyethylene jacket.
Breaking strength is 200# and, unlike the vinyl jacket found on the vast majority of antenna wire, the polyethylene jacket is 100% UV stable, very tough and slippery – almost like Teflon®.
One end comes with a #10 solder lug making attachment to the matchbox simple and allowing the radiator portion to be replaced if ever necessary.
Power rating is a conservative 100 watts. (Ed: 25 watts for the EF-10/20/40)
Lightweight (the 20 meter version is only 0.5 pounds), they are ideal for portable work.
The all black construction makes them difficult to see.
I’ve ordered the EF-10/20/40 version – a 66 ft long version covering 10m, 20m and 40m as is, and usable on any band between 10m and 60m as a mono band with a user substituted antenna wire connected to the EF-10/20/40’s matchbox.
Downside of this version is a 25 watt power limit, which is more than adequate for QRP or portable digital & casual operations, but not suited for anything “cooking with an amp.”
You can find the manual & specifications for this antenna at: http://www.LnRprecision.com/manuals/EF10-20-40.pdf
Full report when it arrives and I have a chance to play with it!
73
Steve
K9ZW
With Varying Frequency - Amateur Radio Ponderings 
Antenna has arrived. Schedule has only let me unwrap & look at in, AND read the directions. Next weekend I hope to try it out!
73
Steve
K9ZW
hi Steve hope the antenna went well for you i got the 20/40 job and it goes good. did some cw testing last sunday morning into vk3 about 1200km the par beat my old g5rv easily . The par was slightly sloping the g5rv was horizontal at 8 m . both feed points same hight on the same portable mast antennas run out in different directions for mounting purposess. 50 watts in both antennas 579 on g5rv 599 on Par. 73 de vk5cz..