Two Hole Balun Cores
Steward
Steward's family of two-hole "baluns" cores offers a versatile, compact and economical solution to a variety of RF challenges. In addition to the traditional balanced-unbalanced impedance matching CATV transformer application, these parts are equally useful as single and dual broadband transformer cores and for common mode and differential mode EMI suppression in applications such as power lines and detonation protection circuits.
Applications
Engine control module connectors, air bags, etc.
9, 15 and 25 pin subminiature "D" connectors
16, 20 and 24 pin dual in-line
PCB mount connectors
16, 20 and 24 pin integrated circuits
Connector leads to PC boards
Applications
2 & 6 Hole Cores
Ferroxcube
Ferroxcube's 2 & 6 Hole Cores are used for small HF transformers, for voltage or impedance matching in TV, communication, data transmission, instrumentation and similar applications.
They are available with 2 & 6 holes (twin cores and six-hole cores), in round and rectangular shapes.
UK Specilaty 
