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Marine Receiver 352

Marine Receiver 352; MIM, Marconi (ID = 643928) Commercial Re
 
Marine Receiver 352; MIM, Marconi (ID = 1713363) Commercial Re
 
Marine Receiver 352; MIM, Marconi (ID = 1713503) Commercial Re
 
Marine Receiver 352; MIM, Marconi (ID = 1713504) Commercial Re
 
Marine Receiver 352; MIM, Marconi (ID = 1713505) Commercial Re
Marine Receiver 352; MIM, Marconi (ID = 1095240) Commercial Re
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Marine Receiver 352; MIM, Marconi (ID = 1095240) Commercial Re
MIM, Marconi: Marine Receiver 352 [Commercial Re] ID = 1095240 933x755
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For model Marine Receiver 352, MIM, Marconi International Marine; Chelmsford Essex:
Marconi Marine Receiver Type 352 from Technical Instruction for Wireless Telegraphists by H.M.Dowsett 1925
 
Country:  Great Britain (UK)
Manufacturer / Brand:  MIM, Marconi International Marine; Chelmsford Essex
Year: 1930 ?? Category: Commercial Receiver (may include amateur bands)
Valves / Tubes 2:
Main principle TRF with regeneration
Wave bands Wave Bands given in the notes.
Details
Power type and voltage Storage and/or dry batteries / 2 or 4 or 6 & 72 Volt
Loudspeaker - For headphones or amp.
Power out
from Radiomuseum.org Model: Marine Receiver 352 - MIM, Marconi International
Material Metal case
Shape Boatanchor (heavy military or commercial set >20 kg).
Notes

The Marconi Type 352 Marine Receiver covers 15 to 20,000 meters in 13 bands. It is an Audion with a rejector circuit, coupling condenser (variable in 3 stages), reaction condenser and a tuned input circuit, feeding a "Note Magnifier" (a three-electrode or pentode valve contained in the receiver) via chocke, transformer and Milliammeter in series to the H.T. The receiver has provisions for emergency operation with a crystal detector that can be plugged into the designated sockets.

It can be used with 2, 4 or 6-volt valves as desired, but a 2-volt supply is recommended.

The 8 LW bands can be switched by a band switch, the 5 SW bands (15 - 200 m) need coil change. Tuning was helped by monitoring the anode current of the detector. The successor model is Type 352A with some improvements, e.g. for band switching.

The complete equipment consists of the Type 352 two-valve receiver, a separate heterodyne oscillator Type 357 for reception of C.W. transmission in the range of 200 to 22,000 meters, and a note filter Type 358, designed to amplify a tuned range of the AF signal.

Note: the so-called "Note Magnifier" is a part of receiver Type 352, and not to be confused with the "Note Filter" Type 358 which is a separate unit.

Mentioned in - - Manufacturers Literature
Literature/Schematics (1) -- Schematic
Literature/Schematics (2) Wireless, L.B. Turner, 1931

Model page created by Ernst Erb. See "Data change" for further contributors.



All listed radios etc. from MIM, Marconi International Marine; Chelmsford Essex
Here you find 15 models, 13 with images and 6 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.



  
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