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H3L7UA; Radio-Holland, Ned. (ID = 1224903) Receiver-C H3L7UA; Radio-Holland, Ned. (ID = 1224904) Receiver-C
H3L7UA; Radio-Holland, Ned. (ID = 1224905) Receiver-C H3L7UA; Radio-Holland, Ned. (ID = 1224908) Receiver-C
H3L7UA; Radio-Holland, Ned. (ID = 1224911) Receiver-C H3L7UA; Radio-Holland, Ned. (ID = 1224924) Receiver-C
H3L7UA; Radio-Holland, Ned. (ID = 1224932) Receiver-C H3L7UA; Radio-Holland, Ned. (ID = 1227006) Receiver-C
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H3L7UA; Radio-Holland, Ned. (ID = 1224903) Receiver-C
Radio-Holland, Ned.: H3L7UA [Receiver-C] ID = 1224903 640x384
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For model H3L7UA, Radio-Holland, Ned. Telegraaf Mij., Amsterdam
Country:  Netherlands
Manufacturer / Brand:  Radio-Holland, Ned. Telegraaf Mij., Amsterdam
Year: 1941 ?? Category: Commercial Receiver (may include amateur bands)
Valves / Tubes 4: ECH21 EF22 EF22 EBL21
schematic requested
Main principle TRF with regeneration
Tuned circuits 10 AM circuit(s)
Wave bands Wave Bands given in the notes.
Loudspeaker Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 10 cm = 3.9 inch
Power out 4 W (unknown quality)
from Model: H3L7UA - Radio-Holland, Ned. Telegraaf
Material Metal case
Shape Boatanchor (heavy military or commercial set).
Dimensions (WHD) 470 x 250 x 230 mm / 18.5 x 9.8 x 9.1 inch
Notes Maritime communication receiver. The band selection is done by a circular drum. Reception covers 15kHz to 21MHz. Band numbered 1 to 10 : 15-46, 46-135, 135-400, 400-1050, 1050-2750, 2750-7500, 7500-9600, 9600-12500, 12500-15700 en 15700-21000 kHz. There is an RF amplifer and a tunable sieve circuit added on using an EF42 (not before 1948) and a tuning indicator EM84 (not before 1957)! The basic set is certainly around WW2 and had 4 tubes only.
Net weight (2.2 lb = 1 kg) 15.6 kg / 34 lb 5.8 oz (34.361 lb)

Model page created by Marcel Hofman. See "Data change" for further contributors.

All listed radios etc. from Radio-Holland, Ned. Telegraaf Mij., Amsterdam
Here you find 7 models, 6 with images and 0 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.