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Transmit:
VFO:
Display:
Output power:
Side tone:
Automatic key:
Selectivity:
Audio Output:
Connection
Built-in battery
Remove the two screws on the back to
or to replace the batteries (8 AA size).
External power supply
Any 9-14V DC voltage or battery pack can be connected to the
transceiver.
It has a built in polarity protection circuit.
Antenna
Any resonant antenna can be connected directly to the antenna
(ANT) with a BNC connector.
an antenna tuner will be necessary.
Headphones
A Stereo headset can only be connected to the headphone port
(PHONE), impedance 8-32 ohm. Do not use a Mono plug.
Key/Paddle
The R4020/R4030 has an automatic function that determines what type
of key is being used and is initiated on Power up.
the sound of the letter "A" if a paddle is connected or the letter "M" if
a straight key is connected.
3.5mm stereo plug
R4020
7.0-7.3 MHz, 14.0-14.35 MHz
R4030
7.0-7.3 MHZ, 10.1-10.15 MHZ
DDS circuit with 50MHz reference frequency
1602 LCD.
12 V supply 4W, 13.8V supply 5W、
about 700Hz
Built in with adjustable speed.
4 crystal filter, SSB bandwidth of about
2.2-1.6KHz four selectable bandwidth,
CW bandwidth of about 900-400Hz in four
selectable bandwidth.
8 ohm load about 0.1W(Requires a stereo plug)
If a non-resonant antenna is used
Connect tip to paddle dot
or straight key's contactor.
Connect ring to paddle dash
or straight key's ground.
Connect to sleeve paddle's ground
or straight key's ground.
Tie Ring and Sleeve together for straight key.
install the battery holder
You will hear (in CW)
2
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