Broadcast receivers coupling circuit - connects UHF receiver and long medium and short wave receiver to common aerial

摘要

The coupling circuit has an absorber and a rejector circuits for UHF signals, and two amplifiers, one of them with two outputs. A first signal path for L. M. and S. wave signals passes through the rejector circuit to the second receiver and a second signal path coupled to the absorber circuit coil (4) transmits the USW signals to the second receiver, and from there through the first amplifier output and capacitor (7) also to the second receiver. First amplifier load resistor is little affected by changes of input impedance of the second receiver. A third signal coinciding with the second between the absorber circuit and the first amplifier, passes through the first amplifier second output, a high-pass filter and the second amplifier to the first receiver.