Re: [neonixie-l] Re: I had to have the 7777777777 tube!

[Richard Arndt]

What a find!!!

On Tuesday, July 13, 2021 at 7:21:23 AM UTC-4 Bill Notfaded wrote:

> It was the world population at the time it was made.
>
> Bill
>
>
> On Mon, Jul 12, 2021, 8:03 PM Owen Crawford  wrote:
>
>> What is the backstory behind this tube and why does it only have the 7 
>> digit repeated?
>>
>> On Sunday, 11 July 2021 at 06:49:29 UTC+10 Bill Notfaded wrote:
>>
>>> I actually didn't pay astronomical amount it was reasonable.  Many of us 
>>> here know the seller.
>>>
>>> Bill
>>>
>>> On Saturday, July 10, 2021 at 1:38:30 PM UTC-7 Christian Riise Wagner 
>>> wrote:
>>>
 So cool! Now make a video of it cycling though all the 7s.

 Btw, may I ask what you ended up paying? The original asking price was 
 astronomical by my standards.

 lørdag den 10. juli 2021 kl. 21.46.37 UTC+2 skrev Bartek Ogryz:

> I'd been watching it on eBay :)
>
> Does it has any printing on it?
>
> -Bartek
>
> sobota, 10 lipca 2021 o 20:16:25 UTC+2 Bill Notfaded napisał(a):
>
>> All the cathodes are 7's!
>>
>> Bill
>> On Saturday, July 10, 2021 at 11:14:50 AM UTC-7 Bill Notfaded wrote:
>>
>>> Here it is!
>>>
>>> Bill
>>> [image: PXL_20210710_180244058.MP_copy_1136x1514.jpg]
>>>
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>>  
>> 
>> .
>>
>

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Re: [neonixie-l] Re: I had to have the 7777777777 tube!

[Bill Notfaded]

It was the world population at the time it was made.

Bill


On Mon, Jul 12, 2021, 8:03 PM Owen Crawford 
wrote:

> What is the backstory behind this tube and why does it only have the 7
> digit repeated?
>
> On Sunday, 11 July 2021 at 06:49:29 UTC+10 Bill Notfaded wrote:
>
>> I actually didn't pay astronomical amount it was reasonable.  Many of us
>> here know the seller.
>>
>> Bill
>>
>> On Saturday, July 10, 2021 at 1:38:30 PM UTC-7 Christian Riise Wagner
>> wrote:
>>
>>> So cool! Now make a video of it cycling though all the 7s.
>>>
>>> Btw, may I ask what you ended up paying? The original asking price was
>>> astronomical by my standards.
>>>
>>> lørdag den 10. juli 2021 kl. 21.46.37 UTC+2 skrev Bartek Ogryz:
>>>
 I'd been watching it on eBay :)

 Does it has any printing on it?

 -Bartek

 sobota, 10 lipca 2021 o 20:16:25 UTC+2 Bill Notfaded napisał(a):

> All the cathodes are 7's!
>
> Bill
> On Saturday, July 10, 2021 at 11:14:50 AM UTC-7 Bill Notfaded wrote:
>
>> Here it is!
>>
>> Bill
>> [image: PXL_20210710_180244058.MP_copy_1136x1514.jpg]
>>
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> 
> .
>

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[neonixie-l] Re: Multiplexing tubes with 1 x K155ID1 vs 2 x K155ID1?

[andybiker]

It's also worth mentioning that with a multiplexed design it's easy to dim 
the tubes for a dark room and obviously extend the life.
I have a bedroom arduino-based clock that has 4x NL5780 multiplexed.
The brightness auto-dims so that it's nice at night (and at a level that 
would be invisible during the day) and then is bright during the day. 

On Tuesday, July 13, 2021 at 6:28:29 AM UTC+1 owen.cra...@gmail.com wrote:

> Makes perfect sense. Thank you for the explanation. Think I'll be going 
> down the direct drive route for my designs.
>
> On Tuesday, 13 July 2021 at 14:43:30 UTC+10 gregebert wrote:
>
>> If you use 1 decoder for 6 tubes, the duty-cycle is 1/6 and it will 
>> require more current to get the same brightness as a tube with a higher 
>> duty-cycle. So, if you use 2 decoders, the duty-cycle is 1/3 and the peak 
>> current will be less vs 1/6 duty cycle.
>>
>> Personally, I never multiplex tubes because it requires more current per 
>> tube, and the wearout mechanism for tubes (sputtering), increases 
>> exponentially with current. In my opinion, IC's are cheap and readily 
>> available whereas nixies are much more expensive and getting harder to 
>> find, so it makes the most sense to drive the tube as gently as possible, 
>> ie direct-drive, to prolong their life.
>>
>> On Monday, July 12, 2021 at 8:00:07 PM UTC-7 owen.cra...@gmail.com wrote:
>>
>>> A little but of a noob question, though looking around at different 
>>> multiplex clock designs, I see that some setups opt for 2 x K155ID1and 
>>> others only have 1.
>>>
>>> A classic example with 2 x drivers would be: 
>>> http://www.arduinix.com/Main/Gallery.htm
>>>
>>> Then I find others with just 1 x drivers: 
>>> https://www.instructables.com/simple-user-adjustable-DIY-Nixie-Clock/
>>> And: https://www.nixieclock.biz/StoreClassicRev5.html
>>>
>>> Why is this the case? I have also seen similar sketch codes to drive 
>>> both single and double drivers, so I am wondering what the decision process 
>>> around this is and if it's even necessary to have 2 drivers to begin with?
>>>
>>

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[neonixie-l] Re: Fair price for Burroughs!

[andybiker]

Seems a fair price.
The tubes seem "well used" (silvered) and some not nicely stored.
Remember that these were an easily replaceable item at the time and were 
often over-driven in equipment to get more brightness.
I have 6 of these in a clock that is direct-drive and has been running 24/7 
since about 2001.
The tubes were used when I had them and they still look better than these 
on ebay!
These are specified as "ultra long life" - about 200,000 hours - over 20 
years. 

On Tuesday, July 13, 2021 at 4:36:06 AM UTC+1 martin martin wrote:

>
> https://www.ebay.com/itm/302978807273?hash=item468af1b5e9:g:8nIAAOSwctJcAaHO
>
> (not mine). I have enough tubes for a while...
>

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