“Toothpick” Audio CW Filter Kit Variable bandpass helps peak desired signal Audio amplifier will drive speaker to room filling volume In / out switch Use with phones or speaker Will work with other qrp rigs and older receivers Measured peak bandpass 700 to 1000 Hertz Introduction: The “toothpick” is a simple variable bandpass audio filter…
Arduino is an open-source electronics prototyping platform based on flexible, easy-to-use hardware and software. It’s intended for artists, designers, hobbyists and anyone interested in creating interactive objects or environments. Arduino can sense the environment by receiving input from a variety of sensors and can affect its surroundings by controlling lights, motors, and other actuators. The…
DIY Project : Elekit TU-8200 Tube Amplifier Kit (SE 6L6). Over the past several years I have been enjoying an Elekit TU-879S Stereo Tube Amplifier Kit paired up along side of Fostex FE206E high sensitivity speaker drivers in Dallas rear-loaded horn enclosures. I put a number of hours on the Elekit TU-879S, enough to fully…
STAMPFL – Stand Alone SDRWatch this video on YouTube LSB, USB, CW, 3 bis 21 MHz durchgehend. DDS AD9851 180MHz CLK Mixer FST3253. Spektrum ATMEGA 8 2Stück 12Bit ADC. Photo by heinzstampfl.ch Photo by heinzstampfl.ch Photo by heinzstampfl.ch www.heinzstampfl.ch
‘My Morse Guide’ – an AVR Electronics Kit Project. My Morse Guide is an electronics kit aimed at young people. The kit delivers both some fun in soldering the kit together as well as having a kit for playing with Morse code My Morse code is a project by Ivo PA1IVO, Leo PA0LEZ and Marianne,…