Bird - 3-1/8" Directional Coupler Elements for EIA Lines (Table 16)
All 3-1/8" Directional Coupler Plug-In Elements 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.
Nominal Coupling: -55 dB
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Several versions available
The chart below provides an overview of element model numbers, along with corresponding frequency ranges and power ratings.
Model Number | Frequency (MHz) | Power |
553-50 | 50-100 | 25 kW |
553-75 | 75-150 | 25 kW |
553-125 | 125-250 | 25 kW |
553-401 | 400-800 | 15 kW |