The F-55A is for laboratory and fi eld testing. It is capable of measuring
pulse transients with risetimes of 800 picoseconds and a pulse width of 3
microseconds. This probe has a small outer diameter, approximately 71 mm,
with an internal diameter of 32 mm. Its transfer impedance is 0.1  from
100 kHz to 500 MHz. It can operate up to 350 amperes of DC – 400 Hz, 10
amperes of CW and 100 amperes of peak pulse

Specifi cations
Frequency: 1 kHz – 500 MHz
Internal diameter: 32 mm
External diameter: 71 mm
Height: 19 mm
ZtΩ 1 : 0.1
dBΩ 1 : -20
Connector: Type-N
DC to 400 Hz: 350 amperes
RF(CW): 10 amperes
Peak Pulse Current 2 : 100 amper