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|Ray Whitcombe's nixie clock|
|Written by Hans Summers|
|Saturday, 28 February 2009 22:29|
"I had just 'resurrected' my original home brew digital timer/clock from the early 1970's. I made this to help in tape recording radio programs, (remember tape?) and now, as I'm in the process of digitising and cataloging these 'early' recordings, the clock also got dug up and refurbished.
"I attach photos of the 'beast' as it was, and the internals during the refurb. The only modifications made were the replacement of most of the original 74 series TTL for 74LS TTL + fitting dil sockets.- mainly to reduce the 'Carbon Footprint'!!!! Well I do pay for the electric! All the PCB's were made on the 'Kitchen Table' as was the front panel, the wooden box was made by a friend.
"Yes, indeed it is. I wanted good accuracy so the tape recorder etc. would switch on exactly on 'cue' - the BBC were good on time keeping then! A glass crystal had the best stability, so I chose a 1 MHz AT cut? Even after being 'laid up' over 25 Years + the 'refurb' it was still on frequency without adjustment!"
|Last Updated on Sunday, 22 November 2009 00:50|