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Radioreceiver Allocchio Bacchini, type Radialba R 82. Year 1924.Medium-Long Wave; superhetherodyne circuit; 8 tubes; battery supply; electromagnetic horn loudspeaker Brown; loom aerial.
Radioreceiver TELEFUNKEN. Medium Wave. Reaction circuit copper shielded. 5 tubes. Baterry supply. 1926
Radioriceiver A. Perego mod. RADIOARPA. 1924.Reflex circuit, 2 tubes. Medium Wave band. Battery supply. Headphone hearing
Radioreceiver Philips type 2531. 1929.Direct amplification circuit, capacitive matching, 4 tubes; OL-OM bands; grid supply; separate antenna and loudspeaker. Bakelite case.
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