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Old April 10th 04, 06:07 PM
zeno
 
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T.E.O. thanks for the response and good info: here are a couple of follow up
questions:

"T.E.O" wrote:

One man's opinion:
Get it as high as you can, use balanced line & the Matchbox.

Coax has much more loss @ SWR 1:1 than balanced line. And you will have
high SWR (on the feedline) on some bands. The plastic "window" 450 ohm
ladder line is OK but acts funny when wet (SWR swings). All that plastic
insulation is the culprit. Moisture on the plastic causes oscillations that
wreak havoc on SWR. Best to make-up your own balanced line with as few
spacers between the wires as possible.


Do you have any pointers or good recipes for making my own balanced line?
materials, spacing, wire size, insulated vs. bare, etc. never done this before.
Also I will have to go through approx. 1+" of wood at the peak of my house, and
then again about 1" of wood to come down through the old farmhouse ceiling
directly to the station. This balanced line will be travelling about 12 feet or
so through my attic and fortunately there is not metal or wiring in that area
to speak of.


To disable the Matchbox relay, use a small bit of matchbook cover or old
credit card between the relay contacts. That's what I did with mine & it's
worked great for years. Very easy to revert back to the relay if you ever go
to separate transmitter/receiver.


Great solution....why didn't I think of that?


I stay away from baluns when I intend multi-band use. They don't act the
same at all frequencies. The Matchbox has no balun, the transmitter output
is coupled to the transmission line via a link. Also, you can extend the
range of the Matchbox (to cover 160). See a "how to" article in Electic
Radio Magazine -March, 2001 issue# 142, page 10. Back issues are available
for $3.75 he http://www.ermag.com/.


thanks for the link, I will look that up.

Zeno (aka Bill -- middle name, and better cw rhythm.....)




1. Is it worth the extra trouble to get ladder line and feed into
the shack (house) (as opposed to coax)? I will have pulleys so I
could try one and then the other.

2. What length should I cut it for? I am new, don't particular know
what frequency I might be on. I had heard that the 160m loop
(approx. 540' or so) could be good as a multi-band. What exact
length should I aim for, or is it even critical? 1005/?

3. If I use ladder line, I would have to use a balun in the shack
to convert to coax a short run to go to my Kenwood Tuner (which has
160m), on other bands I would use a small Johnson Matchbox which
lacks 160m and eliminate this balun. I am envisioning some kind of
old- fashioned DPDT knife switch, I guess.

4. Actually, as a newbie, I have a nothing but more questions, like
how best to override the built in relay in the Johnson Matchbox
etc. I am gradually figuring this stuff out and hope to find some
locals also.