Measuring secondary current

Wes B,

Last night I wound a small pickup coil using a 1.5" dia plastic toroid.  I
wound about 70 turns of #26 insulated wire on it and ran the main secondary
ground wire through it.  Running the coil about one half power (about 24"
discharges) I still measure no voltage from the pickup coil - even on the 5
volt AC scale.  I can't figure this out, I thought there was a lot of current
flowing in the ground wire.  Is this a frequency response problem with my
Simpson volt meter?

Thanks,  Ed Sonderman