Roelof Bakker wrote:

Hello Alberto,

I have used a large coffee tin (30 cm high and 27 cm diameter), for a passive electric field probe. The capacitance was way to high for active circuitry. Instead a rf transformer wound on a hefty high mu toroid was used to couple the antenna to the coaxial feedline. It worked, though the bandwidth was restricted to LF and MF.

An other example is using a small diecast alluminium box (50 x 50 x 30 mm) with the buffer amplifier mounted inside.

Hello Roelof,

  thanks for the info. Well, 30 x 27 cm was rather a big coffee tin...
Who knows, may be a small beer can, those of 33cl, has the right capacity
towards ground... must do an experiment. Suggestions about the brand of the
beer are gladly accepted... :-)

73  Alberto  I2PHD