[TCML] Measuring secondary current

[Andreas Hahn <andreas.hahn@xxxxxxxxxxx>]

How do you accurately measure the current in the secondary's ground wire? 
My current method suggests my secondary is putting 2800 amps into my RF 
ground, which seems a tad high for a coil powered by a two amp transformer.

Here's what I'm doing right now.
I wound ~110 turns on an FT 50-77 ferrite toroid (rated to a few 
megahertz) and calibrated it at 2mV/mA with 14.7k ohms of resistance 
between the output leads, using my signal generator to put some current 
into a 1 ohm resistor via a wire through the center of the toroid.

Feeding the ground wire from my secondary through the center of the 
newly-minted CT and turning on the coil, I put my oscilloscope probe 
across the 14.7k ohm resistor (actually a 10k and 4.7k in series) and 
fired up the coil.

The result is a nice 5.6V peak-to-peak sine wave at the ~500kHz resonant 
frequency of my secondary...

(I just calibrated my 'scope this morning, too...)
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla