"Cecil Moore" wrote in message
t...
Tom Donaly wrote:
O.K., Cecil, I finally figured out what you want to do. You want
snip

Using 600 ohm line and 100 ohms line, if you make the two
sections equal length, the dual-Z0 stub will be very close
to 1/2 the physical length of a single-Z0 stub, i.e. physically
45 degrees long for an electrical 1/4WL (90 deg) stub. On 75m,
that cuts the 1/4 stub physical length from ~66 feet to ~33
feet, a much more manageable length.

Here's a useful equation. For a 1/4WL stub with equal length
sections, the physical length in degrees of each section is:

ARCTAN[SQRT(Z0Low/Z0High)]
--
73, Cecil http://www.w5dxp.com


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