Owen Duffy wrote in news:Xns9B4AAC084EA4nonenowhere@
61.9.191.5:

....
There is a little on the twelfth wave transformer, including a graph of
the lengths for different transformation ratios at
http://www.vk1od.net/RG6/index.htm .

If you read the article, you might try evaluating the systemusing TLLC with
say 10m of feedline configured with:
- the twelfth wave transformer near the antenna and 10m of RG8/X, and
- the twelfth wave transformer near the tx and 10m of RG6.

Intesting, the cheapest option (mostly RG6) is the one with the least loss!

Owen