Loudspeakers F-1 (Freischwinger) and F-3 (Farrand).
Subscriber loudspeakers.DomesticThe loudspeaker "F-1" (Freischvinger) has been produced since 1937 by the Moscow Plant named after XX October. The loudspeaker was produced with and without a stand. The loudspeaker is designed to receive broadcast radio programs and to be built into the body of a radio receiver or speaker. Coil resistance 2.2 kOhm. Input voltage 30 volts. Power 0.3 W. The subscriber loudspeaker `` Farrand-3 '' has been produced since 1939 by the same plant. 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. The loudspeaker is designed for a power of 0.25 W, with a supply voltage of 30 volts. Input impedance 2.4 kOhm.
