On Wed, 25 Oct 2006 17:57:21 +0200, "Henry Kiefer"
wrote:


Yes, a ferrite stick antenna works quite well for receivers, but not for
transmitters. Try winding a few dozen turns around the whole room - i.e.,
up the wall, across the ceiling, down the other wall, across the floor,
and so on. Or, you could wrap a piece of 50-conductor ribbon cable, and
make loops by soldering the ends together offset by 1. ;-)

You made my day
BTW: Your idea with the ribbon cable gives you a very easy made
transformator if using clamping connectors. This works very good. I
practiced it 10 years ago.

The problem with loop antennas made of ribbon cable (or other
multiconductor cable connected this way) is the stray capacitance
between turns. The self resonance frequency (without external
capacitor) may be below the band of interest, so you can not resonate
such antenna with an external capacitor.

Paul OH3LWR