Ten-Tec R4020 - Connection and Setup; Built-in Battery Installation; External Power Supply Connection; Antenna Connection

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Transmit: R4020 7.0-7.3 MHz, 14.0-14.35 MHz
R4030 7.0-7.3 MHZ, 10.1-10.15 MHZ
VFO: DDS circuit with 50MHz reference frequency
Display: 1602 LCD.
Output power: 12 V supply 4W, 13.8V supply 5W、
Side tone: about 700Hz
Automatic key: Built in with adjustable speed.
Selectivity: 4 crystal filter, SSB bandwidth of about
2.2-1.6KHz four selectable bandwidth,
CW bandwidth of about 900-400Hz in four
selectable bandwidth.
Audio Output: 8 ohm load about 0.1W(Requires a stereo plug)
Connection
Built-in battery
Remove the two screws on the back to install the battery holder
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. If a non-resonant antenna is used
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. You will hear (in CW)
the sound of the letter “A” if a paddle is connected or the letter “M” if
a straight key is connected.
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.
3.5mm stereo plug