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| MR4B receiver . The note filter is not in evidence. (Marconi International Marine Communication). |
Frequency Range: Between 220 and 27,000 metres. (1,363 to 11.1 KHz respectively)
IT consists of the following components.Receiver type type 226
Long wave adaptor type 229
Single note magnifier. type 227
Note filter type 282.(optional)The receiver type MR4B (a/k.a/the No.4 receiver) consists of a single self-oscillating valve, making use of grid rectification, and a note magnifier. When receiving spark or interrupted continuous wave (ie MCW) signals, selectivity is provided for by the use of two coupled circuits.
As a general rule, for continuous wave signals the receiver is worked as a single circuit receiver and for spark or interrupted continuous wave signals it is worked as a two-circuit receiver. The note magnifier can be switched into or out of the circuit at will, independently of the other arrangements. A crystal detector is incorporated as a Standby, to comply with International Regulations.
Made by : Marconi UK
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| MR4B receiver . The note filter is not in evidence. (Marconi International Marine Communication). |
Contributors and Credits:1) Hudson's Bay Achieve # PP2009A. The MR4B receiver is part of the MCP manual.
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