On Tue, 29 Sep 2009 14:34:14 -0400, hanslg@aol.com wrote:
> How said the ladder line can't be equipped with a bal/un choke. I
made one by winding two wires next to each other on a 4" PVC pipe. I
had some 25 feet of wires and basically made a 1/1 transformer.
Right connected you will have introduces a nice decoupling inductor
in line with the ladder line. Needless to say I build my own ladder
line out of #14 wire and 4" spacers (spaced 9" apart). Gives you ~
400 ohms line. In my case I am feeding a windom antenna, cut for 80
meter and up. (Works OK on 160 meter too).
>Losses? Probably, but most stations hear me when I am calling bare-
footed, the conditions are OK and no pile-ups.
Your definition of a GOOD common mode choke is very different from
mine. See http://audiosystemsgroup.com/RFI-Ham.pdf Yours will do
VERY little. Mine will do a LOT.
73,
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