Vacuum Tube Time Machine

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Vacuum Tube Time Machine

Postby shlafferty » Mon May 02, 2016 2:33 pm

Tronola.com has just published a new construction article, covering the reproduction of a quartz crystal clock. The design was first published in 1957 by Scientific American. I was drawn to this project by memories of one built by my big brother, Bill, in 1961. With its crystal oscillator, regulated power supply, analog frequency dividers and high-voltage power amp, some may find it interesting. http://www.tronola.com/
Steve Lafferty

Quartz Clock Repro2 1200.jpg
Quartz Clock Repro2 1200.jpg (110.74 KiB) Viewed 4373 times
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Re: Vacuum Tube Time Machine

Postby EWBrown » Tue May 03, 2016 4:19 pm

I have the original article from 1957!

Then there is this all-tube digital clock:

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Re: Vacuum Tube Time Machine

Postby shlafferty » Wed May 04, 2016 5:47 am

Hi EW,

Wow, that's a very impressive clock! Would love to find out more about it. And to think I was worried about what mine would cost to operate! :)

Glad that you have the original Scientific American article. I wish I could have included a link to a scan but the prospects for getting permission didn't look good.

Thanks,
Steve L.
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Re: Vacuum Tube Time Machine

Postby shlafferty » Fri May 06, 2016 7:33 am

To answer my own "query," the clock that EWBrown showed is from a project by Friedhelm Bruegmann, which is presented (in German) here:
http://www.jogis-roehrenbude.de/Leserbriefe/Bruegmann-Digital-Roehren-Clock/Digital-Roehrenuhr.htm

Here is the Google, English-translation link:
http://translate.google.com/translate?js=n&sl=auto&tl=destination_language&u=http://www.jogis-roehrenbude.de/Leserbriefe/Bruegmann-Digital-Roehren-Clock/Digital-Roehrenuhr.htm

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