QRM Eliminator (Why you need to connect a PTT cable)

#hamradio #noise
WARNING! Not sending a PTT signal to the QRM Eliminator allows your RF output power to get into the receiver circuitry of the device, and that could cause permanent damage.
The QRM Eliminator, and other phase cancellation type noise elimination devices, need to be signaled when the transceiver is outputting RF.
There is an RCA female connection on the back of the device, where we must connect an RCA cable that enables the bypass relay inside the device, by completing the path to its circuit ground. It will require a PTT signal from the radio or you can connect a foot-switch, such as the Heil FS-2. The PTT relay bypasses the sensitive receive circuitry and routes the RF power safely to the main antenna connection.
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