INTRODUCTION
Congratulations on your purchase of a Magnum 257 10 meter FM/SSB/AM transceiver. The 257 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 257 is a microprocessor controlled, user programmable radio combining high RF performance
with a user-friendly environment. The 257 is a 12 volt DC, HF transceiver designed for mobile use. The
transceiver 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, and
as cabin space diminishes in modern vehicles, this concept helps create a wider variety of installation op-
tions. Although engineered with mobile use in mind the 257, with the addition of a high quality 10-amp power
supply, may be easily adapted for fixed station operation.
Some of the features of the 257 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 frequency
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 257 a pleasure to own and operate.
IMPORTANT:
The Magnum 257 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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