Dear Peter,
a description with dimension tables for feeding lines with four wires is given
in our German antenna anthology:
Karl Rothammel: Das Antennenbuch
now available via DARC.de Bookservice or Funkamateur.de bookservice used via ebay.
It is a good method, if You want to implement low characteristical impedances, say below 250 Ohm.
55, Hans-Albrecht, DK 8 ND
[email protected] schrieb am 31.12.04 13:53:48:
>
> As you travel along the highway on your next trip, with someone else at
the
> wheel, watch the high-tension lines for transitions similar to the one
> described here. Now that you know what to look for, transitions should be
> easy to spot, regardless of the line configuration.
I seem to recall a method of transposing twin transmission line conductors
for RF at regular interval using square spacers with a hole or notch in each
corner. This was done to improve the balance over a long line. I looked
through all my antenna books but was unable top find any reference to this
technique. I guess this is the same as power line transitions described by
VY1JA.
Peter, G3LDO
>
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