All tube Nixie Tube clock

All tube Nixie Tube clock. Still without case.
Featuring all tube electronics, no semiconductors apart from 1N4007s,
mainly in the BCD decoder circuit. Timebase derived from line frequency.
Neon indicators show state of the flip-flops, making it a dual binary/dec clock.
Flip-flops and active parts in the decoder are E92CC Telefunken tubes NOS.
Display Tubes are russian IN18 in custom designed sockets.
Timebase frequency scaler using E1T beam deflection tubes.
PSU offering 3 tube stabilized outputs.
Direct setting via BCD logic switches.
Aprox. 1500 components, over 4000 solder joints, ca400 Watts
of power consumption.

Category:

Science & Technology

Tags:

• Nixie
• Tube
• Clock
• DIY

[silversurfaren42]

Is this design based on the "Digitahluhr Oncilla" clock developed at the Technische Universität Berlin?

[dercebe]

@silversurfaren42 Thats at least the project that got me started but simply duplicating did not work in my case. My setup is based on hand wiring and not an PCB, so I had to do a lot of fiddling with capacitences

which in some cases differed a lot from the TUB design, even from one stage to another.

And I added the binary output, which was not as simple as one might think, as the flipflops can only drive

very small and uniform loads.

The tube selection however is amlost identical.

regards

[brstuckey]

This is an amazing device. How long did this take you to build? I posted your clip on tubeclockdb com - do you have a website or more photos?

Brian

[dercebe]

@brstuckey Thanks for your feedback. I started layout and collecting parts last christmas, building around

april IIRC and finished in july...but still no enclosure, maybe next christmas ;-)

[jforb427]

Congratulations on building a fine machine!

[pissinguoff247]

Oh my god... that is the coolest thing EVER. Are the plans available? I want to build one to hang in my workshop!

[morning1500]

VERY cool! :)