TopBand: "trapped dipole"

[Jim Fenstermaker]

I need some ideas from the collected masses regarding a horizontal
receiving/transmitting antenna for 80/160.

Near the top of my tower at the 95' level, I have an inverted vee for 75/80
meters with a manually operated stub to change between the portions of the
band.  When I built the antenna last year, I "cut" the supporting lengths
past the insulators to be resonate on 160.  However, I would like to devise
something that would allow me to switch from 80 to 160 without manually
attaching a stub (it's hard to do this at night when it's dark!).

I thought about a "trap" at that point but cannot find any info in the Radio
Amateur's Handbook, Antenna Handbook, or ON4UN's book.  

I also remember back when I first started this madness (radio that is), we
built dipoles with a single feedline but with multiple lengths of antennas
(80 meters, 75 meters, 160 meters) connected to the coax.  In fact, HyGain
use to market this kind of antenna.  I could go this route but would still
need additional wire for the new dipole.

Any recommendations on a workable solution to this configuration?

73 Jim K9JF/7
Vancouver, WA
jfenster@hpux.mesd.K12.or.us 


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