Frequency Range: 300 to 4,800 metres
Typical range: 300 to 400 miles.when woking with low power costal stations.
Circa 1923

Type 11A Direction Finding Set. (Courtesy Marconi International Marine Communications Company Ltd)

Type 11A schematic.(Courtesy Wireless Telegraphists.

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Contributors and Credits:

1  Lewis Bodkin  <05bodkin555(at)gmail.com>
2) The Handbook of Technical Instruction For Wireless Telegraphists", Fourth edition., 1929

Apr 13/20