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9R-4J; Otra Electronics; (ID = 1216991) Amateur-R 9R-4J; Otra Electronics; (ID = 1216992) Amateur-R
9R-4J; Otra Electronics; (ID = 624851) Amateur-R 9R-4J; Otra Electronics; (ID = 679978) Amateur-R
9R-4J; Otra Electronics; (ID = 758751) Amateur-R 9R-4J; Otra Electronics; (ID = 624850) Amateur-R
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9R-4J; Otra Electronics; (ID = 1216991) Amateur-R
Otra Electronics;: 9R-4J [Amateur-R] ID = 1216991 933x586
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For model 9R-4J, Otra Electronics; Amstelveen
Country:  Netherlands
Manufacturer / Brand:  Otra Electronics; Amstelveen
Year: 1959–1963 Category: Amateur-Receiver (amateur bands, may include broadcast bands)
Valves / Tubes 9: 6BD6 6BE6 6BE6 6BD6 6BD6 6AV6 6AV6 6AR5 5Y3GT
Main principle Superhet with RF-stage; ZF/IF 455 kHz
Wave bands Broadcast plus more than 2 Short Wave bands.
Power type and voltage Alternating Current supply (AC) / 110/220 Volt
Loudspeaker - This model requires external speaker(s).
Power out 1.5 W (unknown quality)
from Model: 9R-4J - Otra Electronics; Amstelveen
Material Metal case
Shape Tablemodel, low profile (big size).
Dimensions (WHD) 395 x 210 x 305 mm / 15.6 x 8.3 x 12 inch
Notes AM/CW with BFO, ANL, AVC/MVC. Rather similar with Trio 9R-4J, Lafayette KT-200 and HE-10. Only the speaker output is not a terminal strip, but a 5 contact circular jack, which also outputs the standby switch lines. 5 Ohm speaker out.
Net weight (2.2 lb = 1 kg) 9 kg / 19 lb 13.2 oz (19.824 lb)
Collectors' prices  
Mentioned in Shortwave Receivers - Past & Present (3rd ed.)
Literature/Schematics (1) Communications Receivers

Model page created by Konrad Birkner † 12.08.2014. See "Data change" for further contributors.

All listed radios etc. from Otra Electronics; Amstelveen
Here you find 2 models, 2 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.