[neonixie-l] Re: Enough air circulation for this Nixie clock on book shelf cabinet?

2014-09-30 Thread gregebert
Are there any other holes in the case besides the bottom ? If so, you will 
get some convection air-current thru the case as long as the bottom vents 
aren't blocked. Most of the heat should be generated from the tubes.

The '2' and '5' look a lot nicer on this clock than your previous one

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Re: [neonixie-l] 5 x CD27s on eBay...

2014-09-30 Thread jb-electronics
Matt, you forgot about the B-7031, B-7032, B-7037, B-7038 (and their 
national Electronics versions), and the NL-934 (not sure if there is an 
equivalent Burroughs tube). All 50mm tubes ;-)


Jens

Am 30.09.2014 01:03, schrieb Matt:
For the tube on the far right, how long does it take for tubes to 
darken this badly?


http://i.ebayimg.com/00/s/ODMwWDEzNjA=/z/~ywAAOSwGvhUKGl2/$_57.JPG


At some point, artisan nixie tubes will be cheaper than some of the 
largest NOS tubes that rarely show up.  Of course, to get a decent 
service life, either giver pills need to be found or created or there 
needs to be some other method for adding Hg vapor after the tube is 
sealed from the vacuum pump.



Numeral height:
Nixie Rex (panaplex) 457.2mm 18
CD47135mm   5.31
F9020AA 133mm   5.24
GR-311   70mm   2.76
B-7971   63.5mm 2.5
GR10N59.7mm 2.35
CD27 54mm   2.13
NEO-5000 (panaplex) 50mm 1.97
Z568M50mm   1.97
IN-1840mm   1.58
NL8091   35mm   1.38


On 09/29/2014 06:27 AM, Nick wrote:
Not my auction - they are rare tubes though... 
http://www.ebay.com/itm/221561797737 
http://www.ebay.com/itm/221561797737%C2%A0


Nick





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Re: [neonixie-l] 5 x CD27s on eBay...

2014-09-30 Thread Nick
On Monday, 29 September 2014 20:36:07 UTC+1, mikegregg wrote:

 $2500/piece. yikes!


Nope - USD 2,500 (starting price) for the set. BIN iis USD 4,000

Nick 

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[neonixie-l] Re: 5 x CD27s on eBay...

2014-09-30 Thread petehand
Not my auction either, but I know the seller, and he brought me these tubes 
to check out. I wired them up and created the composite photo to show all 
the digits evenly lit at 4mA. All the tubes are a little darkened, but it's 
very slight in the one on the left and most marked in the one on the right 
- I arranged them in order of darkening, left to right. It doesn't make 
much visible difference when the tubes are lit.

I thought he might sell them one at a time, but I see he's selling them as 
a set. Price wise, I think he's going by the fact that Z568s seem to go for 
$400 and they are common as dirt by comparison.


On Monday, September 29, 2014 3:27:47 AM UTC-7, Nick wrote:

 Not my auction - they are rare tubes though... 
 http://www.ebay.com/itm/221561797737  
 http://www.ebay.com/itm/221561797737

 No activity by the vendor in the last 12 months... who knows? They seem 
 pretty up-front about the slight darkening on a couple of the tubes.

 Nick


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[neonixie-l] Re: Enough air circulation for this Nixie clock on book shelf cabinet?

2014-09-30 Thread Dman777
Thanks! No, other than  the 3 back buttonsonly vents on the bottom. 

-Darin

On Tuesday, September 30, 2014 1:26:54 AM UTC-5, gregebert wrote:

 Are there any other holes in the case besides the bottom ? If so, you will 
 get some convection air-current thru the case as long as the bottom vents 
 aren't blocked. Most of the heat should be generated from the tubes.

 The '2' and '5' look a lot nicer on this clock than your previous one


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