> > Then there's the LASER window-pane bug ... . > I would hazard to guess this doesn't work well on modern double or triple pane windows. - Maybe not. But that's not certain. The enclosed air spaces would certainly provide some damping but high frequency vibrations may pass better than expected. And the modulation of the LASER light on the inner pane of 3 MAY not be totally absorbed by the outer ones. If all 3 reflect with veru roughly the same magnitide and the outer ones are far less modulated the signal level may still be enough to be useful. Lots of "mights" and "maybes" there, but the whole area is a black art already. I wonder if metalised solar film on the outer layer is a help or a hindarance :-). "Maybe" you could reflect RF off such a layer and be back to the original Russian bug general area. (They had an RF powered modulated resonant circuit with retransmission on a harmonic. Great seal bug: Good detail and picturs here. Their basic description of operation doesn't totally match Peter Wright's. http://www.spybusters.com/Great_Seal_Bug.html Cabot Lodge doing his expose at the UN http://www.icue.com/portal/site/iCue/flatview/?cuecard=1211 The Gary Powers U2 shoordown censure vote followed immediately after this. Only Poland voted with the USSR. Who can say if / how much the bug influenced the voting results? Russell -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist