Congratulations on your choice of the MFJ-9420 20-Meter
transceiver. The MFJ-9420 is specially designed to deliver
performance you never thought possible from a low power radio.
Please read this manual carefully before attempting to operate
your new radio.
FEATURES
The MFJ-9420 is an easy-to-operate,"back to basics" radio. Operate the unit with ease in minutes!
Quiet DBM front end and lots of overall gain for great sensitivity. If the signal is there, you'll hear it!
Adjust the tuner or aim the beam with pin-point accuracy. A calibrated analog S meter measures even the
smallest variations in signal strength. The meter also monitors your speech processing level on transmit.
Sharp ladder filter cuts adjacent chatter and focuses transmitter power where you need it most for great
selectivity.
Effortless tuning with custom manufactured 8:1 reduction drive ball bearing VFO tuning capacitor provides
smooth and stable VFO.
Big audio and powerful AF output even in noisy locations from a special Philips BTL audio chip and
rugged 3" speaker.
Full time RF speech processing commands speech cuts through QRM and competes with radios running
far more power. Compare with your 100-watt rig. You'll be amazed by the signal reports!
Packs the same punch as 50-Watt radios without the heavy 10 Amp power supply! Designed to run on
NiCd's or the ultra light MFJ 4110 ac wall adapter supply.
Rugged Motorola PA transmitter runs cool, and tolerates 3:1 VSWR accidentally opened feedlines or
feedline shorts.
Conservative design, with a premium plate through pc board, quality components, handsome brushed
aluminum panel, and a tough vinyl clad case ensure years of dependable service.
Available CW adapter board installs and lets you jump
to the low end to work CW.
Semi-break in keying and sidetone.
At home or on the go, you'll enjoy countless hours operating the MFJ-9420. Best of all, it's fully backed by
MFJ's exclusive "No Matter What" 1 year guarantee. If it breaks, we'll take care of it!
You'll need three things to get your MFJ-9420 on the air fast:
12 14 Volt 2 Amp Power Source.
600 Ohm Dynamic PTT Microphone
20 Meter Antenna
1. POWER SUPPLY: The MFJ 4114 AC/NiCd Portable Power Pack or
MFJ-4110 ac Wall adapter. Supply are specially designed to run
the MFJ-9420. You may also use any 13.8 Volt supply or 10-cell
NiCd pack as long as it delivers 2 A on peaks (12 Volt supplies
will work fine but at reduced RF output). Use a 5.5mm OD x
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