[GreenKeys] Early Teletype in the RN

[cjckidd]

Hello everyone,


Thanks for all you help on the TP photos I sent Gil.

The HMS  Collingwood Heritage Collection was recently given a number of research reports from the 1920s and 1930s. They were written by the HM Signal School. I think you will find this extract from one interesting - see para 3 . The report is dated 1923. The grid signalling unit was developed to allow efficient keying of three PA valves in parallel . It electronically changed the bias on the grids rather than letting 3 mechanical /magnetic keys earth the grids which as you can guess gave problems - especially as the PA was also the oscillator.
Was the RN contemplating using Teletype in the 1920s? I  have more research to do to answer that question. High speed, 60WPM, automatic morse seems to have been preferred right up until the 1950s

Clive






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