yoke resonant frequency

"1) The resonance frequency of the yoke."

--
we made a simple model last week and swept it from 0 - 10khz
  --- .067 uF - 150 --+-- 3 -- gnd
   +-------.5 mH -----+
the circuit was flat from DC, dropping by 3db at 1khz
this is a rough aproximation of the horizontal deflection in 
a G08. I forgot to write this down, but I think the RC kicked
in at around 50khz.