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TRV300a; Ingelen, (ID = 112704) Radio
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TRV300a; Ingelen, (ID = 112592) Radio
Ingelen,: TRV300a [Radio] ID = 112592 640x480
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For model TRV300a, Ingelen, Elektrotechnische Fabrik Ing. Ludwig Neumann GmbH; Wien:
Ingelen TRV300a (mit Netzgerät)
Country:  Austria
Manufacturer / Brand:  Ingelen, Elektrotechnische Fabrik Ing. Ludwig Neumann GmbH; Wien
Elektrot.Fabrik Ludwig Neumann
Year: 1959/1960 Category: Broadcast Receiver - or past WW2 Tuner
Semiconductors (the count is only for transistors) 8: OC170 OC71 OC45 OC45 OC71 OC71 OC74 OC74
Main principle Superheterodyne (common); ZF/IF 459 kHz
Tuned circuits 8 AM circuit(s)
Wave bands Broadcast plus 2 Short Wave bands.
Power type and voltage Dry Batteries / 6x1,5 Volt
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) - elliptical
Power out 0.25 W (unknown quality)
from Model: TRV300a - Ingelen, Elektrotechnische
Material Leather / canvas / plastic - over other material
Shape Portable set > 8 inch (also usable without mains)
Dimensions (WHD) 270 x 195 x 94 mm / 10.6 x 7.7 x 3.7 inch
Notes Ovallautsprecher 10 x 16 cm
Net weight (2.2 lb = 1 kg) 2.2 kg / 4 lb 13.5 oz (4.846 lb)
Price in first year of sale 1'645.00 öS
External source of data E. Erb 3-907007-36-0
Source of data -- Original-techn. papers. / Radiokatalog Band 2, Ernst Erb
Circuit diagram reference Unterlagen E.Erb
Mentioned in RADIOBOTE, Österr. (Heft 56/2015, S.17 ff, Gerätebeschreibung)
Literature/Schematics (1) -- Original-techn. papers.
Picture reference Das Modell ist im «Radiokatalog» (Erb) abgebildet.

All listed radios etc. from Ingelen, Elektrotechnische Fabrik Ing. Ludwig Neumann GmbH; Wien
Here you find 438 models, 385 with images and 318 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.