Roy Lewallen wrote:
Ian White, G3SEK wrote:
A few more thoughts, in case they're useful to Dan or anyone else:
* It's sometimes possible to make an automatic two-band network. For
example, the same 33ft end-fed vertical can be matched as both a
half-wave on 20m *and* a quarter-wave on 40m, with one network and no
switching. The same goes for a 66-footer (vertical or inverted L) on
40/20, or a 130-footer on 160/80.
. . .

Wes Hayward, W7ZOI, published either a QST article or a Technical
Correspondence piece about doing this, many (10? 15?) years ago. A
search of the QST CDs should turn it up.

Yes, that's the one.

I possibly have a photocopy somewhere, but don't recall seeing these
extra details, which Roy may have hard directly from Wes:

If I recall correctly, he concluded that either a two-band solution
could always be found, or that he wasn't able to find a combination
that he couldn't find a two-band solution for.



Just by observing this newsgroup, though, it seems like very few hams
are any longer interested in matching an antenna to a feedline,
preferring to buy ladder line and a tuner instead.

If anybody's interested in this "two bands, one coax, no switches"
solution, I'll try to put a PDF together over the weekend (it isn't a
good subject for ASCII art). It also struck me that this may be a good
subject for an Excel spreadsheet, or one of Reg's programs.



--
73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB)
Editor, 'The VHF/UHF DX Book'
http://www.ifwtech.co.uk/g3sek