The ultimate in 40 meter rotatable dipole is the OptiBeam OB1-40.
SWR issues - minimal.
https://www.optibeam.net/index.php?article_id=103&clang=1
Yes I have one!
Thanks n 73,JamesKI5DQ
On Sunday, October 1, 2023 at 07:17:44 PM CDT, Gene Smar via TowerTalk
<towertalk@contesting.com> wrote:
Steve:
I've had a Cushcraft D40 atop my tower and mast at 78 feet since 2001. It was
actually enjoyable to build. Turning radius is 21 feet. SWR curve is smooth
like in the assembly manual (I set my D40 element lengths to resonate around
7.020Hz.) You will need to wind a coax balun for the feedpoint - IIRC, it's 12
turns about 6 inches in diameter.
It's worth a look, IMHO.
73 deGene Smar AD3F
Sent from my Radio Shack TRS-80 model 100 laptop
On Sun, Oct 1, 2023 at 7:33 PM, Steve<sflory@mindspring.com> wrote: is it
better to build our buy a 40 meter rotatable dipole? any good kits? what is the
best facotory made
Steve Flory W9KOP
sflory@mindspring.com
"I like climbing towers because people look up to me"
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|