Ferrite Ring Toroid Core, ID = .9"/23mm, OD= 1.4"/35.6mm Mix 61 - Replacement for uncoated Ferroxcube/Phillips TX36/23/15-4C25. This listing is for a bulk pack of 10.
OCF antennas are very convenient as they will allow multiple bands of operation with a simple wire antenna which is fed off center with a 4:1 OCF Current balun with built in feed line choke,