Stefan Wolfe wrote:
With just a few easy modifications you could change your 80 meter dipole
into a G5RV and cover nearly the whole ham band including 40m. Despite what
you may hear from some disparagers, G5RV is actually an excellent antenna.

Pretty good on 80m, 40m, 20m, and 12m. Not very good
on 30m, 17m, 15m, and 10m.

http://www.cebik.com/wire/g5rv.html
http://www.vk1od.net/G5RV/
http://www.w8ji.com/g5rv_facts.htm

On 75m, putting a 1200 pF shunt cap across the 300 ohm
feedline at the balanced to unbalanced junction will put
the resonant point in the phone band and result in very
close to an SWR of 1:1 on the coax. The cap needs to
be removed for 40m operation.
--
73, Cecil http://www.w5dxp.com