[Lowfer] Antenna current measurement - LEM current sensor?

[Ben Hall]

Afternoon all,

Some time ago I needed to make some current measurements.  A search for 
a solution lead to me to Hall Effect current sensors made by LEM.

With the talk of antenna current measurement, knowing that the LEM 
sensors can measure AC and DC current, I decided to see what the data 
sheets listed for frequency range.

Several models have a -3 dB bandwidth of 400 kHz:

<http://www.digikey.com/product-detail/en/HLSR%2032-P/398-1123-ND/4331980>

<http://www.lem.com/docs/products/hlsr-p%20series.pdf>

While no-good for the ~500 kHz band, maybe useful for LOWFERs?

I will admit that at $14 a pop, plus the need for additional circuitry, 
they are probably less useful than the transformer-rectifier units that 
are self-contained and self-powered...

thanks much and 73,
ben, kd5byb