The 1/4 kw set was intended for use as an emergency set for a high power installation, or it could be used as the primary set in smaller ships. It was used in conjunction with the type 31A receiver. Power to the M-G set input was derived from a battery of 30 cells, each having an 80 ampere- hour capacity. This would allow the set to transmit continuously for up to 10 hours. The AC power ouputt from the M-G set was 250 watts, at 110 volts, 300 Hz .
Frequency range: 300 and 600 metres and was continuously adjustable up to about 750 metres.
Power level: 250 watts output.
RF Output note: 600 Hz
Spark type: Synchronous (meaning that the the spark is in step with the alternator frequency).
Range: About 150 nm
Made by : Marconi UK
|1/4 kw cabinet set.|
|Both images courtesy Handbook of Technical Instruction for Wireless Telegraphists. Download image to enlarge).|
Contributors and Credits:
1) Lewis Bodkin <05bodkin555(at)gmail.com>