The HDR-2005 is a simply homebrew DC receiver for approximate 300 kHz to 30 MHz. It is a direct conversion receiver with I/Q quadrature sampling detector. Most of the parts are from my junk-box. I build it only for my privat pleasure (hobby) and not for commercial use.
My hobbies are gardening, mountaineering and last but not least the homebrewing of receivers.
2003 I did an internet search
concerning new receiver designs and technologies. I found a lot of articles about the work from Dan Tayloe, Gerald Youngblood
and many others. However 2004 I then built an other receiver and experimented with the so called H-mode mixer. In 2005 the
quadrature sample detectors took my interest again and so I started to build a receiver similar the SDR-1000, but without software or DSP.
SDR is a great concept but I want to build a pure hardware receiver - the Hardware Definded Radio 2005 (HDR-2005). Now I
am a ham aspirant (amateur radio operator) and study in the meantime for my examination (ham radio license) because I saw that
many great receivers are designed by OMs and I noticed the ham spirit. My technical university and former technical school education is an additional background for my hobby.
Since 2010 I am myself an OM with the callsign OE3HBW. My suffix is HBW (homebrewer)- what else?
Yes, feel free to copy my concept, but I liable by no means for your possible misfortune. My knowhow coming from many people and the receiver principle is not my invention. I am grateful for all my suppliers of ideas.
