ERI Precision Coaxial Directional Couplers

Electronics Research, Inc. (ERI) precision directional coupler family for FM radio, VHF, and UHF television applications. These precision fixed directional couplers are for 1-5/8-inch, 3-1/8-inch, 4-1/16-inch, and 6-1/8-inch transmission lines and can be purchased with one (1) to four (4) coupling probes. These directional couplers are balanced high precision test instruments. They are capable of a being set for a wide range of coupling
values and always have excellent directivity. The inner conductor and fixed locking flange maintain precise alignment of the inner conductor to maintain the calibrated coupling level and directivity during shipping and when they are relocated.