Official Contest Thread

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8 years 1 month ago #61 by Beast Lee
I'll toss myself into the ring...
:woohoo: :woohoo: :woohoo: :woohoo: :woohoo: :woohoo:

"It has to have an ending to exist" - Beast Lee
"If it doesn't have a V8, it's not a sport" - Beast Lee

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8 years 1 month ago #62 by mjrippe
Hello, nice site! Please sign me up for the NEO-5000 drawing. Also check out some neon goodies at www.mikerippe.com

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8 years 1 month ago #64 by 5-ht
What a great idea for a contest. Requires little action or intelligence on my part. I like that!

Mark

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8 years 1 month ago #65 by Stuckey
Finally, we're starting to get more entries!

Feel free to use the form for non-contest uses too B)

"If the laws of physics don't apply in the future, then god help you."
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8 years 4 weeks ago #68 by aarggh
I love the look of the NEO! (man I hope I win!)

Absolutely brilliant.

On another note, what are people doing for power supplies for VFD's such as IV-17/18's? seems to be a lot of conflicting views floating around aout AC vs DC, current and voltage levels. Is there some simple solution to driving these?

cheers,
Ian

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8 years 4 weeks ago #69 by bodger
There are a couple of different issues when powering VFDs. Ideally, you have two voltages, the anode/grid voltage (24-70 VDC at a few mA), and the filament voltage (1-6 VDC at several to a few dozen mA, floating on a few volts DC). For the anode/grid voltage, there are two common ways to do it. One is to have a positive supply, and switch the anodes and grids between it and ground (like a nixie). Another is to have a negative supply, bias the filament with it, and switch the anodes and grids between it and ground (this is common in industry).

However, AC filament drive is tricky to come by, so many folks just go with a DC filament supply, which is easier, and generally works okay for single-digit tubes. The need for filament bias is greater in these cases, but it's possible to do without it when you're going for a real minimum-parts solution.

There are some canned VFD power supply modules available cheaply on the surplus market that provide a center-tapped AC output, along with a DC supply or two, positive or negative. These are pretty versatile, and can be used with series resistors to adapt to filaments with lower voltage requirements.

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8 years 4 weeks ago #70 by Rioclock
Welcome.
This tube(s) must be mine ;-)
I know tubeclockdb from a long time.
This is good place in the cyberspace.
I wish You success with this forum and many, many members.

www.rioclocks.xtreemhost.com
MAGIC WORLD RIOCLOCKS

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8 years 4 weeks ago #72 by neonglass
Count me in as a contestant for the NEO

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8 years 4 weeks ago #73 by Steamboatbilljr
I'm new to Nixie tubes, but figured I've got as much of a chance to win as anyone else, so why not enter. Thanks! :silly:

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8 years 4 weeks ago #75 by Stuckey
Okay, only a few days left. Here is how I am going to do the drawing.

I will make a list of everyone's user name who posted in this thread. I will assign everyone a number (1,2,3,n) and I will then use Random.org to pick a random number.

I will contact the winner via email.

Good luck! B)

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