cw filter

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Breadboard Radio - Maker of QRP Kits, QRP CW receiver and transmitters, audio CW Filters, antenna tuners, dummy loads, and morse code practice oscillator
[ Hits: 1313 | Votes: 1 | Rating: 10 ]

Icom 706MkIIG Filters ^updated - Icom 706MkIIG Filters, Make a narrow CW filter work in SSB for the digital modes
[ Hits: 337 | Votes: 3 | Rating: 7 ]

Arduino QRP Transceiver: DIY Success on HF Bands - This article introduces an Arduino-based QRP CW Transceiver designed for lower HF bands. The journey begins with the Wotduino, evolving from a keyer to a multi-mode beacon. The development includes a QRP transmitter and culminates in a receiver inspired by Roy Lewallen design. The transceiver, controlled through a control bus features a signal path, modulation, filtering, and adjustable frequency settings. Despite initial testing intentions, successful QSOs on 80 and 40 meters showcase its functional capabilities.
[ Hits: 109 | Votes: 1 | Rating: 1 ]

30 Meter Band Pass Filter - A homemade band pass filter for the 30 meter band based on the original VE7BPO design
[ Hits: 595 | Votes: 1 | Rating: 6 ]
Audio CW Filter - An home madek Audio CW Filter made simply using SMD Components
[ Hits: 173 | Votes: 0 | Rating: 0 ]

17 meter QRP Transmitter - 1-watt 17-meter cw transmitter that was originally done about 10 years ago as a club project for RAMS, the Radio Amateur Megacycle Society. It uses a VXO, rather novel at the time. It also uses a bandpass filter at the output rather than the usual lowpass
[ Hits: 122 | Votes: 0 | Rating: 0 ]