In article ,
Sal M. Onella wrote:

Of course you could make two j-poles, one for 2m and one for 70cm. They can
even be "stacked" all in one piece with separate feedlines. Tricky. Saw
one article years ago but can't find now.

Google "Copper Cactus" for that one.

I was never able to figure out the design details of the "single
feedline" Copper Cactus - it uses some internal matching stubs which
were not well-described.

The dual-feedline Copper Cactus worked out pretty well for me - I used
it for around 5 years (roof-mounted) until I replaced it with a
commercial tri-band antenna.

--
Dave Platt AE6EO
Friends of Jade Warrior home page: http://www.radagast.org/jade-warrior
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