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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 DR1 o DR1A o DR2 o DR2A o DR2-2 o DR2B o DR2C o DR2D o DR2E o DR2G o DR2A+ o DR2A++ o DR3X o DT1 o DT2 o DT2A o DT2A1 o ADTRX1 o ADTRX2 o AVALA-01 o AR1 o AR1B o AR1C o HF/VHF oscillators o Synthesizer RZ6HY o Miniwhip PA0RDT
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Filters designed by YU1LM/QRP 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.
This filter is designed to improve selectivity and receiver IMD specifications on top band. Band pass filter for 160 m built by Michel ON7EH Band pass filter with low insertion loss IL for 2 m This is input band pass filter for mine 144 MHz SDR receiver. It has a good selectivity and insertion loss is 0.65 dB max. Realization is simple ,very easy and repetitive.
Band pass filters with low/moderate insertion losses IL for 6 m This article describes 3 types of input band pass filters for 50 MHz receiver/transmitter use . They have good/moderate/high selectivity and insertion losses in range from 0.65 dB to 2.3 dB max. Realization is simple ,very easy and repetitive.
I corrected BP schematic which wasn't readable
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