YU1LM/QRP site navigation new from last site update o Homebrew o YU1LM SDR clasification o DC (direct conversion) receivers o DC RX-YU1LM Serbian o DC RX-YU1LM English o DC (direct conversion) transmitters o Audio phase shift networks o Tunable crystal filter o Tunable HF BP 2-30 MHz o Band pass 1.8 MHz o Band pass 50 MHz o Band pass 144 MHz o TX BP HF/6m ver1 o TX BP HF/6m ver2 o TX BP HF/6m ver3 o RX BP/LP HF/6m o AVALA TX BP/LP HF/6m o LP/BP for 100-500kHz o HF Multiplexer Filters o DR1 o DR1A o DR2 o DR2A o DR2-2 o DR2B o DR2C o DR2D o DR2E o DR2G o DR2A+,DR2A++ o DR2F+,DR2F++ o DR2H+,DR2H++ o DR2I+,DR2I++ o DR3X o DT1 o DT2 o DT2A o DT2A1 o ADTRX1 o AVALA-01 o AR1 o AR1B o AR1C o HF/VHF oscillators o CMOS SDR oscillator o Synthesizer RZ6HY o Miniwhip PA0RDT o OK2CPV SMT receiver
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HF SDR (Software Defined Radio) transmitters All published designs and materials are free for personal and non commercial use. Other use for commercial purpose are not allowed without permission of the author.
Part 3. SDR HF receivers DR1A (Advanced) similar to the DR1 but with improved specifications the same situation is with DR2A and improved DR2 and transmitter DT2A. Practical experience and answers on questions.
DT2A SDR transmitter built by Gerard F6BSZ
SDR TX projects DT1, DT2 and DT2A built by author Tasa YU1LM/QRP Correction for YU1LM previously published SDR designs I made a lot of designs and I am trying to do best from my side always. I made some mistakes because PCB and schematics are not done one from other. I made this two activity separately because PCB design in CAD not satisfying me with results which it made automatically. This is reason why I hadn't always good correspondence between each other. Also sometimes I made some correction on my realized PCBs before publishing and I accidentally made some errors trying to do design better. I have ask all readers and homebrew apologize for inconveniences and ask all to help me and other homebrew fans to find them. I made check few times but mistakes obey Murphy low and it is hard to prevent them.
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