Qrp Gaijin

blog: http://qrp-gaijin.blogspot.com

Dip meter (GDO) with LED display
Dip meter (GDO) with LED display
Dip meter (GDO) with moving-coil meter
Dip meter (GDO) with moving-coil meter
Use of right-angle drill adapters to change axis and position of rotation
Use of right-angle drill adapters to change axis and position of rotation
Shortwave regenerative superhet with delayed AGC, varactor tuning, and ferrite rod antenna
Shortwave regenerative superhet with delayed AGC, varactor tuning, and ferrite rod antenna
1.2v regenerative superhet, part 2
1.2v regenerative superhet, part 2
1.2-volt shortwave superheterodyne receiver with regenerative detector and varactor tuning
1.2-volt shortwave superheterodyne receiver with regenerative detector and varactor tuning
Homebrew RTL-SDR upconverter: physical construction
Homebrew RTL-SDR upconverter: physical construction
Homebrew RTL-SDR upconverter: HF reception
Homebrew RTL-SDR upconverter: HF reception
Shortwave regenerative receiver with tiny ferrite antenna (2/2)
Shortwave regenerative receiver with tiny ferrite antenna (2/2)
Shortwave regenerative receiver with tiny ferrite antenna (1/2)
Shortwave regenerative receiver with tiny ferrite antenna (1/2)
Digital generation of analog control voltages from an Android phone
Digital generation of analog control voltages from an Android phone
Varactor-tuned shortwave regenerative receiver (1.2 volts)
Varactor-tuned shortwave regenerative receiver (1.2 volts)
Fringe howl in regenerative receiver
Fringe howl in regenerative receiver
Regenerative receiver with reduced need for regeneration adjustment
Regenerative receiver with reduced need for regeneration adjustment