Generator 2 tons

The originality of this description is that the generation of tones BF is made using a DDS. And this not using a special integrated circuit, but components easy to find in the drawer of funds.

The main characteristics of this assembly are:

- Generation 2 frequencies 800 + 1000 Hz or 400 + 2600 Hz (by moving a jumper)
- Generating a single frequency of 1000 Hz
- 1a single-or 25.0 mV eff. en 2 tons to 2 tons
- Purity spectral between 0.3 and 150 kHz sup. 50dB to 50dB
- Distortion inf to 0.01% (monofrequence)
- power by 9V battery consumption 8 mA or 50 hours of operation with an alkaline battery.
- Switching to automatic PTT start.