Using RF cables as filters for wireless microphone receivers.
There are often situations where a strong signal may interfere with the reception of wireless mic signals.
An old trick which has been largely forgotten about, is using certain lengths of coax (RF) cable to create notch filters and thus reduce this problem.
Before getting into the construction details, a quick, simple introduction for those that may not be familiar with RF design work is in order.
A coax cable is essentially just a conduit to carry RF signals from a source (e.g. an antenna)
to it’s final destination, a receiver in this case.
It goes without saying, that this conduit should exhibit as low a loss as possible, least amount
of radiation (and thus ingress of interference as well) and not change the signal it is carrying in any way.