F-1 1937
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The loudspeaker "F-1" (Freischvinger) has been produced since 1937 by the Moscow Plant named after XX October. ,86e6f450b8cc469628ba70bf2947b049 The loudspeaker was produced with and without a stand. ,86e6f450b8cc469628ba70bf2947b049 The loudspeaker is designed to receive broadcast radio programs and to be built into the body of a radio receiver or speaker. ,86e6f450b8cc469628ba70bf2947b049 Coil resistance 2.2 kOhm. ,86e6f450b8cc469628ba70bf2947b049 Input voltage 30 volts. ,86e6f450b8cc469628ba70bf2947b049 Power 0.3 W. ,86e6f450b8cc469628ba70bf2947b049 The subscriber loudspeaker `` Farrand-3 '' has been produced since 1939 by the same plant. ,86e6f450b8cc469628ba70bf2947b049 It is an upgrade of the F-1 model and is intended for use in radio receivers, acoustic systems and for a wired radio network. ,86e6f450b8cc469628ba70bf2947b049 The loudspeaker is designed for a power of 0.25 W, with a voltage input of 30 volts. ,86e6f450b8cc469628ba70bf2947b049 Input impedance 2.4 kOhm. ,86e6f450b8cc469628ba70bf2947b049 ,null,ru,null,null,null,null
Documentation:
Information from collection of Valery Khartchenko