AVT2818 A

For beginner radioamator the most interesting bands are 80m and 40m, or 20m. On the popular "eighty" in the day, mainly Polish stations are heard, and in the vicinity of 3.7MHz, PZK messages are broadcast.
The presented layout is unusual; despite the simplicity of the system, it enables the implementation of the CW / SSB device for any two selected KF amateur bands, e.g. 80 / 40m. Not only the electronic system itself, but also the service has been limited to the minimum necessary while maintaining good parameters. The receiver uses the following integrated circuits: two types TA7358 and one TA7368.

The device is especially recommended for amateur amateur radio enthusiasts

Selected parameters:

• work on two selected amateur bands (80m, 40m or 20m)
• single frequency conversion
• ladder filter in the IF path
• the option of mounting an LSB / USB ribbon switch
• smooth tuning - the possibility of installing a precisionizer
• the ability to perform the so-called trap - blocking filter
• built-in power amplifier
• smooth volume control
• output to a loudspeaker or headphones
• smooth volume control
• power supply - 4.5-8 Vdc
• printed circuit board and documentation included
  
  Detailed description in
  EdW 4/07