Happy Jack Posted May 14, 2013 Share Posted May 14, 2013 [attachment=134769:1921 Amplifiers.jpg] Quote Link to comment Share on other sites More sharing options...
Roland Rock Posted May 14, 2013 Share Posted May 14, 2013 :-D Reminds me of this, which I'd really like http://www.boredpanda.org/analog-tele-phonographers-christoper-locke/ Quote Link to comment Share on other sites More sharing options...
Balcro Posted May 14, 2013 Share Posted May 14, 2013 [quote name='Happy Jack' timestamp='1368523232' post='2077901'] [attachment=134769:1921 Amplifiers.jpg] [/quote] Quote Link to comment Share on other sites More sharing options...
icastle Posted May 14, 2013 Share Posted May 14, 2013 [quote name='Happy Jack' timestamp='1368523232' post='2077901'] [attachment=134769:1921 Amplifiers.jpg] [/quote] I thought it was Kim Jong Un demonstrating his country's new high speed WiFi. Quote Link to comment Share on other sites More sharing options...
flyfisher Posted May 14, 2013 Share Posted May 14, 2013 A sort of related example would be the 'sound mirrors' built to detect enemy aircraft in the days before radar. Examples are still dotted around the south coast of England. http://en.wikipedia.org/wiki/Acoustic_mirror Quote Link to comment Share on other sites More sharing options...
Happy Jack Posted May 14, 2013 Author Share Posted May 14, 2013 [quote name='flyfisher' timestamp='1368539189' post='2078177'] A sort of related example would be the 'sound mirrors' built to detect enemy aircraft in the days before radar. Examples are still dotted around the south coast of England. [url="http://en.wikipedia.org/wiki/Acoustic_mirror"]http://en.wikipedia....Acoustic_mirror[/url] [/quote] I prefer the Japanese War Tuba ... [url="http://en.wikipedia.org/wiki/Japanese_war_tuba"]http://en.wikipedia.org/wiki/Japanese_war_tuba[/url] Quote Link to comment Share on other sites More sharing options...
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