I don't use a tuner on 80m but do when tuning other bands. I've tried adding length which just reduces performance on 80m. Antenna analyser shown dips on 3.35MHz, 11Mhz and 18Mhz. Its all a bit funny at the moment due to the 40m dipole being up. My nice 1.5-1.7 swr on 80m, 3.6Mhz has gone up to over 2 at 3.35Mhz due to this. Not sure where the other dips would be without taking it down.Originally Posted by WØTKX
Are you using a tuner with that inverted L? Do you have an antenna analyzer?
You might try adding 20+' to the end of the "L" and see if you can match it with the tuner.
On both 80 and 40. Maybe add an extra temporary radial cut closer to 32'.
You might be pleasantly surprised. The antenna analyzer would tell you more.
Matching a half wave (40) can be a bitch.
As far as my limited antenna knowledge tells me, only 2 ways to get 40m on that antenna, add a trap or swap the unun for an EFHW tuner. I'm leaning towards a trap to avoid having to swap the boxes at the base of the antenna.
Other antennas that might work at my location - OCF dipole, but then 80m lost. Been considering the G4FEK antenna http://www.g7fek.co.uk/blogus/newssh...ce_anten_29507
Or as my friend suggests, a doublet taking up all the available horzontal space fed with ladder line and used with a balanced tuner.
There is approximately 20m of horizonal space available.
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