Delta Electronics TCA RF Ammeter System

The Delta Electronics TCA RF Ammeter System is a transformer-coupled RF current meter designed specifically for AM broadcast sites where accurate, repeatable current readings are essential. It provides precise measurement of common point and antenna base currents so engineers can confirm radiated power, verify system performance and document compliance over time.

At the heart of the system is a toroidal current transformer installed around the RF conductor, which develops a sample voltage directly proportional to the RF current in the line. This RF sample is carried over a 50-ohm coaxial cable to a temperature-compensated rectifier assembly that converts it into a linear DC signal. The DC output drives a large, easy-to-read panel meter calibrated in RF amperes, and the same signal is available on rear terminals to feed a remote meter in the transmitter building or control room. TCA RF Ammeters are available in a wide choice of single and dual-scale ranges, with custom scales and relay-equipped versions for alarm and control where required.

• Transformer-coupled RF ammeter system for AM common point and antenna base current measurement
• Toroidal current transformer provides accurate RF sampling without breaking the RF line
• 50-ohm coaxial link to temperature-compensated rectifier and linear RF current meter
• Front-panel meter calibrated in RF amperes with matching DC output for remote indication
• Standard and custom full-scale current ranges including 5, 10, 20, 40, 80 and 160 A
• Optional contact-closure outputs for remote alarms, interlocks or transmitter control
• Robust design for continuous service in transmitter rooms and phasor cabinets

The Delta TCA RF Ammeter System is also available factory-integrated on the
Delta CPB‑1 Common Point Impedance Bridge, creating a combined solution that lets you read both operating impedance and RF current at the common point so AM directional arrays can be kept at licensed power and impedance at all times.