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Zo = characteristic impedance in ohms
C1 and C2 = Capacitance in Farads
L1 and L2 = Inductance in Henries
f1 and f2 = Cut off frequencies in Hertz
Band Stop Filters
A Band stop of Frequency Rejection Filter
Used to stop certain frequencies for example 2m where there is interference on a television set
A Braid Breaker

Used to insulate Television antennas where there are EMC Issues
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