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DR-4020 DUAL BAND QRP DIGITAL RADIO
DR4020 is a 40m/20m dual-band radio for digital modes that requires a computer with specific
applications to use. It can be used in the popular FT8, FT4, JT65, as well as PSK31, SSTV and
other modes.
Specifications:
88*38*124mm（buttons are excluded）
Dimensions
320 G
Weights
Operating
10-14VDC
Voltage
50Ma @RX， 700-800mA（12V ）@TX
Current
7.0-7.2MHz。14-14.35MHz
Frequency
USB 400-2800Hz
Filter BW
4-5W（ 12V ）
Output
Memory
5 memories per each band,user defined
VOX，Control audio voltage：less than 30mVp ，full power：70mVp @40m，
TX method
120mVp @20m。
The signal inputs and outputs have a 1:1 isolation transformer to electrically isolate the radio from
the computer and reduce interference.
Manual
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Table of Contents
Summary of Contents for VENCER DR-4020
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Page 1: Specifications
DR-4020 DUAL BAND QRP DIGITAL RADIO Manual DR4020 is a 40m/20m dual-band radio for digital modes that requires a computer with specific applications to use. It can be used in the popular FT8, FT4, JT65, as well as PSK31, SSTV and other modes. - Page 2 Connecting to computer External power supply Any 10-14V DC supply or battery pack with a current greater than 1A can be connected via an external power connector. Polarity protection circuit available inside the radio. Antenna Any resonant antenna can be directly connected to the antenna interface (ANTENNA) with a BNC connector, and an antenna tuner should be connected between the antenna interface and the antenna for a non-resonant antenna.
- Page 3 DR4020 can be used with PC,Laptop or Raspberry Pi. 1, While using a laptop,and if there is only one combined AF/MIC jack,please pay attention to the different wirings of the computer audio jacks below: 2, An external USB sound card may be required if you use Raspberry Pi to connect to DR4020.
- Page 4 Operating Power switch Power switch PWR On the left side of the panel, press PWR to power on, press PWR again to turn off. Band and Frequency selection Short press the right VFO knob of the panel to select between 40 meters and 20 meters. Rotate VFO knob to change the stored working frequency.
- Page 5 Computer settings The MIC gain of the computer is generally set to the maximum. If the application software shows that the input level is too high, the MIC gain can be appropriately reduced. The radio's transmitting can be adjusted using the tuning function in the application software.
- Page 6 Wuxi Venus Information Technology Co., Ltd https://ba4tb.qth.com/shop/...
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