AUDIBLE VSWR DETECTOR FOR PORTABLE REPEATER
Original Publication Date: 1991-Apr-01
Included in the Prior Art Database: 2001-Dec-07
The user of a portable radio has a significant detector using a directional coupler, a detector, a influence as to the radiated power of the transmitter comparator, an audio oscillator and the radio speaker. and its antenna. It is recommended to hold a radio two or more inches away when talking into it. This is both for user safety and to optimize the power The circuit would bei,designed to trigger the "555" oscillator if a voltage :level greater than a preset radiated. If a radio is held too close, a significant loss amount was exceeded. NThis would be, for example, in radiated power will occur. set to trip when the VSWR exceeded 21.