I have Sony stereo recever in my office. FM reception is ok, but I get zero AM. I have experimented with AM loops (the plastic loops that typically come with receivers, of which I have several sizes from receivers I have owned in the past): reception of the one station I am targetting improves a bit with a loop flat against the window glass, but not enough so to make it listenable. I tried the Terk Tower amplified AM/FM antenna - that was worse than the loops - no signal at all.

Any antennae you would recommend for this purpose? Anything I could home-brew that would be better? I am targetting 640 khz?

If the building - note that this is a Fortune 500 corporation - was designed to keep 802.11bg signals in (wireless networking) - could this be part of the problem? how can I overcome it (without breachingthe integrity of the walls).

Thanks,

J