AVT2889 A

Recently, in the professional press, the topic of SDR (Software Definied Radio) is becoming more and more popular. What distinguishes receivers with the use of this technology is their simplicity and low cost of performance with very large capabilities and high dynamic parameters. These types of systems are ideal for beginner radioamators. They can be completed within 2-3 hours. SDR receivers are devices with frequency conversion to acoustic frequencies, i.e. with direct transformation.
In the presented system there are no, requiring tuning and little-liked, inductive elements. The only component of this type is the ready-made HF bandpass filter. In addition, a handful of popular 74 series integrated circuits and NE operational amplifiers are still needed.

The device is especially recommended for novice radioamators and people interested in SDR technology

Selected parameters:

• device tuned to the center of the band 80m
• high resistance to overdriving
• very simple layout
• no tunable induction components
• cooperation with any popular decoding program, eg Rocky, SDRadio, PowerSDR
• cooperation with any sound card
• power supply: 12Vdc
• tile dimensions 106x53mm
• printed circuit board and documentation included
  
  Detailed description in
  EdW 1/09