[Elecraft] KX3 - 1:1 balun

[w0ih]

Steve,

1. I've seen baluns made with insulated wire, I don't think that it makes
any difference.
 
http://www.collegearc.com/index.php?option=com_content&view=article&id=165:building-a-current-balun&catid=77:technical

2.  I would keep the coax between the rig and the balun short.  There could
be some very high SWR's on that piece of coax.  You could try to design the
balun box to connect directly to the rig output, but I can't see where a
short piece would make that much difference. (I'm assuming that you have the
internal tuner on the KX3.)

3. As for the triple ratio balun designs, I built a balun recently using an
Amidon kit.  The kits typically come with a spec sheet that has about 8
different designs.  You can also look up the designs in the ARRL Handbook.
The design that I used has a 200, 450 and 800 ohm output tap and it's also
possible to tap at other ratios (1.5:1 to 16:1).   I plan to use it with a
W3EDP antenna design.   Mine is a 2kw core, but you could easily adapt it to
a smaller core.

If I'm not mistaken, you have KX3 SN 687, I have 688...

Mike
  W0IH

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