Magnum 357DX Operating Manual - page 4
INTRODUCTION
Congratulations on your purchase of a Magnum 357DX 10 meter FM/SSB/AM transceiver. The 357DX is
designed to provide years of enjoyment and trouble-free service. There are many features and functions
designed into this transceiver. To ensure that your investment is enjoyed to its fullest extent, please take a
few moments and thoroughly read this manual.
The Magnum 357DX is a microprocessor controlled, user programmable radio combining both high RF per-
formance with a user-friendly environment. The 357DX is a 12 volt DC, HF transceiver designed for mobile
use. The transceiver is configured in two separate components; a high powered RF deck and a compact
sized control deck. The two decks are linked via a proprietary control cable. As cabin space diminishes in
modern vehicles, this concept helps create a wider variety of installation options. Although engineered with
mobile use in mind the 357DX, with the addition of a high quality 50-amp power supply, may be easily
adapted for fixed station operation.
The control deck utilizes the latest in surface mount production techniques. This keeps the size of the unit to
a minimum without sacrificing any of the advanced circuits required for today’s high performance radios. The
RF deck incorporates a pair of bi-polar RF transistors in push-pull operation. The devices are continuously
biased class A/B using Magnum’s exclusive fully regulated bias circuit. This means unsurpassed audio qual-
ity in SSB and AM modes.
Some of the features of the 357DX are; an advanced design liquid crystal display that provides the operator
with a full visual account of the transceivers operating status, automatic frequency scanning from either the
front panel or microphone, memory storage of your favorite frequencies and modes, programmable fre-
quency resolution of either 1 kHz, 10 kHz or 100 kHz, and split frequency operation for repeater use. These
are just a few of the features that make the 357DX a pleasure to own and operate.
IMPORTANT:
The Magnum 357DX is designed for amateur radio use. If the transmitter is operated in the
United States or within it’s territories a licensed amateur radio operator must be present at the station. The
minimum license class to operate 10 meter phone is Novice/Technician. If you are studying for your license
and want to familiarize yourself with the operation of the radio, the receiver may be operated with or without
a licensed operator present. For more information regarding FCC licensing, contact your nearest amateur
radio dealer, or for complete details contact the American Radio Relay League.
American Radio Relay League (ARRL)
225 Main Street
Newington, CT 06111
Telephone 860-594-0200
Facsimile 860-594-0259
http://www.arrl.org
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