Specs Guide:

• A Series: 25 to 60 MHz
• B Series: 50 to 125 MHz
• C Series: 100 to 250 MHz
• D Series: 200 to 500 MHz
• E Series: (E-400) 400 to 800 or (E-800) 800 to 960 MHz
• H Series: 2 to 30 MHz

APM Elements are specially designed to be used with the APM-16 Wattmeter and are calibrated in accordance with meticulous Bird calibration procedures supported by a long history of mean deviation values to assure adherence to advertised specifications of current instruments, as well as field interchangeability with equipment purchased, used and trusted in all the years since its introduction.

Note: Elements must be chosen from the same series and the forward and reflected elements chosen in a 10:1 power ratio.