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,
RFI/EMI Solutions from KHz to GHz
RFI range from 1-300 MHz
Ferrite Snap On, ID = .514in/13.1 mm, Mix 31
# Turns of RG-8X = 2
# Turns of RG-213 = 1
Square or Hex sided depending upon inventory stock