User's Manual

418 Users manual Release 1.00 – NOVEMBER, 2011
Part #74468
Printed in USA 8
3.2. Key In / Out
The rear panel on the 418 has a 1/8” stereo
jack for connection of a key input and key
output. The tip is used as the key input to key
the 418 and the ring is used as a key out for
other configurations. The key out has a delay
of 10 msec. This allows the 418’s relay to
close before the transceiver applies RF to the
418. The key out is not a relay. It is a
transistor switch rated for a maximum of 24
volts and 250 mA.
See Figure 2.3-1 for proper wiring. See
section 4 for other connections.
1/8” stereo jack, part number 35263
KEY IN
KEY OUT
1/8” stereo to 2 RCA jack, part number 46216
Figure 2.3-1
3.3. Power
Anderson Power Pole connectors are used for
the 13.8VDC nominal +/- 15% input. These
connectors are rated for 30 Amps each. The
voltage source must be capable of supplying
23 amperes continuous duty
3.4. Fuse
The fuse is an auto style 25amp.
3.5. Antennas
There are 4 SO239’s on the rear of the 418.
The 1
st
labeled RADIO is the RF input from
the transceiver. HF ANT 1 and HF ANT 2 are
the HF antenna connections selectable from
the front panel switch. 6M ANT is always
selected when 6 Meters is selected on the
front panel.