Bob Miller wrote:
You're losses on various bands may be pretty high with coax. That's
why most all-banders are fed with ladderline. Losses are lower. But
that's your choice.

Owen has a feedline loss calculator at: http://www.vk1od.net/tl/tllce.php
EZNEC (including the free demo version at www.eznec.com) can be used
to estimate the SWR to plug into the calculator.

For instance, 100 feet of RG-58a used on 14 MHz with an average SWR of 5:1,
loses ~4.7 dB, or ~66%.

To get the same loss with Wireman #554 ladder-line, the average SWR could
be allowed to equal 53:1.
--
73, Cecil http://www.qsl.net/w5dxp