Koptelefoonset DLR No.1 (DLR No.1 headphones)

part of wiring marked in Bakelite DRL No.1 4035A


DC resistance 2x50 = 100 Ohm. See also DLR-2 and DLR-5 as balanced armature phone. See also the article for DLR-5 about rewinding. There are some other brands and US made balanced armature type headphones like the US Navy WWII (WW2) Deck Talker Headset Type R17T23.

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