Radiation field meter

This circuit can be quickly checked for overall transmitter performance, including antenna systems. The meter can be 1 mA, but 0-200 μA or 0-50 μA will be more sensitive. The longer the reference antenna used, the higher the sensitivity of the meter. Keep the lead length short. If various transmitter input measurements are recorded when the transmitter is functioning properly, they can be used as a reference for future troubleshooting.