better get out the snorkle... if you tie the braid and the center conductor
together you get a 25 ohm line, i use that all the time for my stack
matching boxes.

wrote in message
oups.com...
Cecil Moore wrote:
Sonny Hood wrote:

I have an antenna that needs 100 ohm twin lead to match the impedance
of the feed point. The 450 ohm lead has messed up the match and
screwed up the resonance, does anone know of such an animal?
K4WYS

Use side-by-side runs of 50 ohm coax to achieve a balanced Z0
of 100 ohms. Tie the braids together at both ends.
--
73, Cecil http://www.qsl.net/w5dxp

Sounds like he may be trying to match a Quad or a Loop. If I am not
mistaken, the usual way to do this is with a 75 ohm Q section.
Side-by-side runs of 50 ohm coax with the braid tied together will
yield 25 ohms because they are in parallel. Not 100 ohms. Or do I
need to dive back into the antenna book?
Gary N4AST