Clean Up Your Signals with Band-Pass Filters
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چکیده
In January 1996, Tim Duffy, K3LR, chief operator of one of the top-three-ranked multi-multi contest stations, contacted me. Tim asked me to design a series of band-pass filters (BPFs) that he could use between his 150 W transceivers and 1500 W amplifiers. He wanted to reduce the transfer of harmonics and broadband phase noise to the amplifiers. The filters would also make the transceivers, when receiving, less susceptible to overload from the adjacent-band transmitters. This project is the result of my efforts in designing, constructing and testing BPFs for six amateur bands—160, 80, 40, 20, 15 and 10 meters.
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Clean Up Your Signals with Band-Pass Filters
In January 1996, Tim Duffy, K3LR, chief operator of one of the top-three-ranked multi-multi contest stations, contacted me. Tim asked me to design a series of band-pass filters (BPFs) that he could use between his 150 W transceivers and 1500 W amplifiers. He wanted to reduce the transfer of harmonics and broadband phase noise to the amplifiers. The filters would also make the transceivers, when...
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