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/