Трансивер Волна SDR, V2.6

Upgraded in Russia..https://www.youtube.com/watch?v=_PCqfyQGlUU *Color - Luminous red. *Installed USB connector, CW key connector. *On the DSP board, installed CW key optocouplers and USB terminals. *New AF amplifier with a delay relay was installed. *Bandwidth of the DAC filter was reduced from 16kHz to 8kHz. *Elimination of excitation of a sound amplifier at high frequencies. *Increased the initial current of the transistors PA. *Software programs updated. *Power Input 12 V, in order to prevent switching noise from internal SW regulator, removed it and now driving by external linear DC power supply.