Jim Brown wrote:
>>> There is, by the way, another very good way to broadband the match to a
>>> dipole to cover 3500 - 3900 and keep the SWR below 2:1. EE prof W6NL says
>>> the idea goes back at least 80 years.
>>> Cut the antenna to about 3675 kHz and verify that it resonates there.
>>> Connect a half-wave of any good 50 ohm coax to the antenna, then add a
>>> quarter-wave of a good 75 ohm coax. If the combined length is too long,
>>> coil up the excess. If you need more coax to get to the rig, add any length
>>> of 50 ohm coax.
AutoEZ users: If you'd like to experiment with modeling this
broad-band 80m dipole see the 4th section on this page:
https://ac6la.com/aecollection5.html
There is a link to download an AutoEZ format (.weq) model at the end
of the section.
Dan, AC6LA
https://ac6la.com
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|