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| Keywords: Valve.radio.arp.600pix.jpg A two-valve home-made radio from 1958 The leads connect to the low-voltage filament battery and the high-voltage anode battery <br> Taken by Adrian Pingstone in 1958 and released to the public domain en wikipedia 1958 Adrian Pingstone at http //en wikipedia org en wikipedia Arpingstone original upload log page en wikipedia Valve radio arp 600pix jpg 2004-11-12 10 14 Arpingstone 600×700×8 113622 bytes <nowiki>Valve radio reupload better quality</nowiki> 2004-03-24 21 03 Arpingstone 600×700×8 85985 bytes <nowiki>Reupload of valved radio</nowiki> Vacuum tube installations Radio receivers | ||||
