User manual

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Shipping: 13737 SE 26
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31
Loops can take on
nearly any closed shape
such as a square,
rectangle, triangle, or
diamond shape and they
can be fed on the sides
or in the corners. The
impact of different
configurations and feed
points is well
documented in the many
books on antennas.
It is also possible to feed a loop from a Coax connection by
connecting one side of the feed point to the center conductor and
the other side of the feed point to the coax shield.
3.3.5.7 Beams
Typically, the radiating
element of a beam is a
dipole antenna fed with
coaxial cable. Connecting a
beam to the MAC-200 is
accomplished by connecting
the coax to positions 3, 4, or
5.
Mailing: PO Box 3526, Bellevue, WA. 98009
Shipping: 13737 SE 26
th
St. Bellevue, WA. 98005
Toll Free: 800-259-7331 * Phone: [phone] * Fax: [phone]
www.sgcworld.com * Email: [e-mail]
32
3.3.6 Tips & Tricks
1. The most frequent source of problems in unbalanced
antenna systems is the RF Ground. RF grounding is
frequently misunderstood and poorly implemented. See
our book The HF User’s Guide available free for
download from [WEB ADDRESS].
2. Be aware of the difference between a SAFETY ground
and an RF ground. Safety grounding is necessary to
protect your life and property from coming into contact
with lethal doses of electricity. RF grounds, when
required, are necessary to the operation of your antenna
system. Connecting the two together can inject RF into
your other electronic equipment.
3. It is a good idea to reserve one SO-239 position on the
MAC-200 for a dummy load suitable for initial tune-up
on your transceiver.
4. Plan your antenna installation carefully!
5. Don’t commit to a final installation until you have tried
out your antennas in as near to final form as possible.