My main interests are:144MHz weak signals,21MHz DX-ing,High dynamic range HF and VHF Receivers,SDR Receivers,LINRAD SDR Project,High dynamic range mixers,Low Phase Noise generators, and Phased array antennas...FDMDV-digital voice...QS1R SDR Project...CNC...CNC multi-axis milling...Parametric,automatic CNC Code Generators...

On the photo...SP2GGZ Station,144MHz Power Amplifier...abt 1977.

Indonesia, West Jawa...                                    Indonesia, Jakarta...

Indonesia, Jakarta at Night...                                                                                        

WSPR-by K1JT...digital,fully automatic Ham

Radio...try it at:  http://wsprnet.org/drupal/