Ed DD5LP writes:
Hi Bill,
Given that the audience of SolderSmoke is more angled towards home brew and self construction, I wonder if you would mind informing your listeners of a very valuable antenna design website that despite the high level of quality work put in, is not getting very many visitors and may therefore be taken down.
Given that the audience of SolderSmoke is more angled towards home brew and self construction, I wonder if you would mind informing your listeners of a very valuable antenna design website that despite the high level of quality work put in, is not getting very many visitors and may therefore be taken down.
Access to the site is free and the URL is sota-antennas.com.
Despite SOTA being part of the name this is of use for all portable operators and indeed home stations as well. It is a series of online tools that not only defines wire lengths for building but also gives EZ-NEC like diagrams of the expected radiation patterns.
My favourite little jewel is in the off-centre-fed dipole section where the positioning of the feed-point is varied automatically to show you the bands the antenna will resonate on. So as an Example a 40m OCFD with a feed-point at 33/66% will not resonate on 15m however one with the feed-point located somewhere near 18/82% will.
My favourite little jewel is in the off-centre-fed dipole section where the positioning of the feed-point is varied automatically to show you the bands the antenna will resonate on. So as an Example a 40m OCFD with a feed-point at 33/66% will not resonate on 15m however one with the feed-point located somewhere near 18/82% will.
The website currently supports Linked-Dipoles, Off Centre Fed Dipoles, End Fed Half Waves, Delta Loops, Half Squares and Moxon antennas. It could be extended to support others but that is unlikely if the current site is not used more.
Thanks Bill!
73 Ed DD5LP
73 Ed DD5LP
Posts
No comments:
Post a Comment