[Elecraft] Forty Meter SSB

[Fred Jensen]

Ahh ... the venerable "cage" dipole [or reasonable facsimile thereof].  
There used to be "cross," "star," and circular insulators for just this 
purpose, maybe there still are. Google knows ... try "cage dipoles".  
You will get even wider BW with 4 wires in a square, 6 in a hexagon, or 
more in a circle although the marginal benefit of another wire in the 
cage decreases as the number of wires increases.  The humongous antenna 
for the Duga Russian Woodpecker OTHR used cage elements.

The cross and star insulators were great for building multi-band 
coupled-resonator antennas.  They're quite a bit easier to get adjusted 
than fan-dipoles, I built one for 30/17/12 right after we got those 
bands.  Google knows about C-R antennas too.

73,

Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County

Bill Frantz wrote on 11/23/2021 1:18 PM:
> I found when I built a single wire dipole for 40M it didn't have a low 
> enough SWR across the band for my preferences at the time. I fixed the 
> problem by using two wires, spaced about 10cm, 4" apart for the 
> elements. They join in the middle at the common mode choke and just 
> loop back at the ends. This lowers the Q of the antenna enough so it 
> satisfied my SWR goals.
>
> 73 Bill AE6JV
>



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