[TenTec] OT: Indoor antenna

["John B. Egger" <john_egger@comcast.net>]

A friend (a Tech+) with an Icom 718 and a manual MFJ tuner will have to 
use an indoor antenna due to restrictions. I'm trying to help her get on 
40 meter HF. I was going to try simply a wire with a ground 
counterpoise, but I'm not sure what length to use. I think there are 
some principles about best lengths, and those to avoid, but don't 
remember what they are. Any help, or links elsewhere? Googling "amateur 
radio indoor antenna" gave some ideas, but nothing about this question 
of lengths.
--
---John K3GHH
Registered Linux User #291592
Kubuntu Maverick Meerkat, KDE 4.5.1