Jerrykins Posted November 28, 2012 Share Posted November 28, 2012 Right then, what about an underwater telegraph communications experiment, the chaps in the hut are sending morse code or similar underwater signals transmitted from the watertight underwater container and the sticky out bit is the aerial to an underwater receiver/submarine mock up nearby? Jerry Quote Link to comment Share on other sites More sharing options...
Lauren Child Posted November 28, 2012 Share Posted November 28, 2012 From the man himself: But this is nothing to do with sound, mines or torpedoes (although it is in a torpedo testing lake) D'oh - I should have remembered that Quote Link to comment Share on other sites More sharing options...
N.O.S. Posted November 28, 2012 Share Posted November 28, 2012 Whatever is in the tank is always at atmospheric pressure......... It can be moved up and down in the water........ It can be moved in any required direction........ Wherever the tank goes, the shed goes........ Nothing to do with sonics, chickens, mines, torpedoes, or detaining small kids at shopping centres....... Just thinking online :blush: Quote Link to comment Share on other sites More sharing options...
fv1609 Posted November 28, 2012 Author Share Posted November 28, 2012 Right then, what about an underwater telegraph communications experiment, the chaps in the hut are sending morse code or similar underwater signals transmitted from the watertight underwater container and the sticky out bit is the aerial to an underwater receiver/submarine mock up nearby? Jerry Jerry yes very well done! Nobody previously seemed to consider that the pipes, hoses etc were electric cables. In fact it was Cable, high tension, pattern 816 This was for testing a trailing antenna for submarine use operating on 30kHz. Vernon did branch out it electrical & wireless work. One thinks of HMS Mercury but that I think only came about in WW2. I'll upload the full diagram in a minute It was located here: http://www.raf.mod.uk/rafsubaqua/expeditions/portsmouth.cfm Quote Link to comment Share on other sites More sharing options...
N.O.S. Posted November 28, 2012 Share Posted November 28, 2012 Well I was taught NEVER to tow anything by its aerial or electric cable :red: Quote Link to comment Share on other sites More sharing options...
Tony B Posted November 28, 2012 Share Posted November 28, 2012 ELF!!! Extremeley Low Frequency!!! http://en.wikipedia.org/wiki/Extremely_low_frequency Quote Link to comment Share on other sites More sharing options...
fv1609 Posted November 28, 2012 Author Share Posted November 28, 2012 Anyone have a go at a date for this? Quote Link to comment Share on other sites More sharing options...
Jerrykins Posted November 28, 2012 Share Posted November 28, 2012 A guess WW1. Jerry Quote Link to comment Share on other sites More sharing options...
private mw Posted November 28, 2012 Share Posted November 28, 2012 i knew this all along but too busy watching im a celebrity get me out of here ! :red: Quote Link to comment Share on other sites More sharing options...
gritineye Posted November 28, 2012 Share Posted November 28, 2012 Tut tut Clive you deleted the A word..:shocked: :-D Quote Link to comment Share on other sites More sharing options...
gritineye Posted November 28, 2012 Share Posted November 28, 2012 Well I was taught NEVER to tow anything by its aerial or electric cable :red: Look at the big drawing Tony, it's for hauling out aerial, not towing.. Quote Link to comment Share on other sites More sharing options...
private mw Posted November 28, 2012 Share Posted November 28, 2012 1896 . :undecided: Quote Link to comment Share on other sites More sharing options...
fv1609 Posted November 28, 2012 Author Share Posted November 28, 2012 (edited) A guess WW1. Jerry It was 1923. The power levels must have been frightening the aerial had to be capable of handling 12.5 A at 16 kV. Edited November 28, 2012 by fv1609 Quote Link to comment Share on other sites More sharing options...
fv1609 Posted November 28, 2012 Author Share Posted November 28, 2012 Tut tut Clive you deleted the A word..:shocked: :-D Bernard that's what ******* censorship is all about Never to make things too easy Quote Link to comment Share on other sites More sharing options...
N.O.S. Posted November 28, 2012 Share Posted November 28, 2012 Look at the big drawing Tony, it's for hauling out aerial, not towing.. :blush: Didn't think of that..... Quote Link to comment Share on other sites More sharing options...
philb Posted November 28, 2012 Share Posted November 28, 2012 Here's a link to the valve spec http://www.radiomuseum.org/tubes/tube_t4a.html, quite a beast! Quote Link to comment Share on other sites More sharing options...
fv1609 Posted November 29, 2012 Author Share Posted November 29, 2012 Quote Link to comment Share on other sites More sharing options...
fv1609 Posted November 29, 2012 Author Share Posted November 29, 2012 (edited) Here's a link to the valve spec http://www.radiomuseum.org/tubes/tube_t4a.html, quite a beast! This is a NT4A set up in HMS Yarmouth, probably not get all this on the raft. Edited November 29, 2012 by fv1609 Quote Link to comment Share on other sites More sharing options...
Tony B Posted November 29, 2012 Share Posted November 29, 2012 The heat of that must have been stupendous! Even with modern systems the best you could get was about one carachter a minute sent, basically enough to tell the sub to come up and call home! Quote Link to comment Share on other sites More sharing options...
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