XPhase Interference reduction

The function of the XPhase is based on the fact that the interfering signal, received by an auxiliary antenna, is added phase-shifted to the signal received from the main antenna
post 26 Dec 2021


RF Filter Links

72



Second-Harmonic-Optimized Low-Pass Filters
The FCC requires transmitter spuriousoutputs below 30 MHz to be attenuated by40 dB or more for power levels between5 and 500 W

Some Simple Strategies for Phone RFI
I quickly found when I went to 1000 watts on 160 and 75 meters that my telephones were susceptible to fairly significant RFI problems

The Ladder Filter
Such a filter must have sufficient bandwidth to pass one sideband whilst having response shaped to attenuate the other

The NVARC Ugly Filter Project
to build sets of band pass transmitting filters for reducing the interference between HF transceivers operated in close proximity

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