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The LORAN long range navigation system placed transmitters all around the world. The hardest part of constructing the transmitter was designing "high Q" notch
by daly 5y ago
The LORAN long range navigation system placed transmitters all around the world.
The hardest part of constructing the transmitter was designing "high Q" notch filters for any local frequencies.
Perhaps the 5G transmitters can install such high Q filters.