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Tech Head - The Technology Section
Retro Tech
Facinated by BBC clocks and their accuracies
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<blockquote data-quote="spiney" data-source="post: 254004" data-attributes="member: 192438"><p>In days past, the BBC used Gents master/slave clock systems, that sent 1 Hz pulses round the building from master to slave clocks. Kept perfect time. The same systems were used in schools, to ring the bell at preset times (you might remember the same white clock on your classroom wall!). </p><p></p><p>The master clock could be synchronised to a time reference, the BBC used GMT pulses via landline from the National Physical Laboratory (not any more, now the Beeb has its own atomic clock, just don't tell George W Bush ... !).</p><p></p><p><a href="http://mysite.wanadoo-members.co.uk/Pulsynetic/index.jhtml" target="_blank">http://mysite.wanadoo-members.co.uk/Pulsynetic/index.jhtml</a> .</p></blockquote><p></p>
[QUOTE="spiney, post: 254004, member: 192438"] In days past, the BBC used Gents master/slave clock systems, that sent 1 Hz pulses round the building from master to slave clocks. Kept perfect time. The same systems were used in schools, to ring the bell at preset times (you might remember the same white clock on your classroom wall!). The master clock could be synchronised to a time reference, the BBC used GMT pulses via landline from the National Physical Laboratory (not any more, now the Beeb has its own atomic clock, just don't tell George W Bush ... !). [url]http://mysite.wanadoo-members.co.uk/Pulsynetic/index.jhtml[/url] . [/QUOTE]
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Retro Tech
Facinated by BBC clocks and their accuracies
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