Re: [neonixie-l] Set of six GR10J on eBay!

[Dekatron42]

I believe they hadn't come as far as to add Mercury to the gas mix at this 
stage in time.

/Martin

On Friday, 12 August 2022 at 19:21:57 UTC+2 nickja...@gmail.com wrote:

> Those look really sweet.
>
> So did they stop using mercury because of the environmental psychosis, or 
> was there an actual legitimate reason?
>
> On Fri, Aug 12, 2022 at 8:44 AM Paul Andrews  wrote:
>
>> Interesting they are ETL. Mine are Hivac. It took me a long time to get a 
>> set of 6. I didn't run this clock with these tubes in it for long, because 
>> of the lack of Hg.
>> [image: 6F36DF9E-1657-4BBF-891C-2BEF1F623E5B_1_105_c.jpeg]
>>
>> On Friday, August 12, 2022 at 12:53:33 AM UTC-4 Kevin A. wrote:
>>
>>> I feel like PIRs are a must on most nix clocks. Why burn up tubes when 
>>> no one is around to enjoy the glow? Seems like a total waste. 
>>>
>>> For older stuff that doesn't have PIR compatability built in, you can 
>>> always get an external PIR controlled switch: 
>>> https://www.amazon.com/gp/aw/d/B00KAB4CRG?psc=1=ppx_pop_mob_b_asin_title
>>>
>>> On Thu, Aug 11, 2022, 9:36 PM Nicholas Stock  wrote:
>>>
 Datasheet does give an expected lifetime of 10,000 hrs, which is pretty 
 good. Put a PIR on a clock with them and it'll last a long time...

 On Thu, Aug 11, 2022 at 6:17 PM Audrey  wrote:

> > No Hg
>
> That's quite unfortunate for such nice tubes
>
> On Thu, Aug 11, 2022, 8:51 PM Nicholas Stock  
> wrote:
>
>> No Hg in those puppies IIRC.
>>
>> On Thu, Aug 11, 2022 at 3:43 PM Audrey  wrote:
>>
>>> To infinity and beyond...
>>>
>>> On Thu, Aug 11, 2022, 6:42 PM Dekatron42  
>>> wrote:
>>>
 A set of six GR10J on eBay: 
 https://www.ebay.com/itm?itemId=134195749943=1

 Not my listing….


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Re: [neonixie-l] Dekatrons on Jeopardy! ?

[jf...@my-deja.com]

 I took a closer look at the picture.  It looks like there is a small 
4-digit number outside the octagon which I interpret as "5944".  There is 
a  larger 4 digit number inside the octagon which I think is "7?25" (where 
the 7 is clear, the ? is unreadable, and the 25 is my best guess).  Both of 
these seem inconsistent with 7236.

Also, I only see one off-center orange glow in each tube, and I would 
expect two in a dual triode. 

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Re: [neonixie-l] Set of six GR10J on eBay!

[jf...@my-deja.com]

On Thursday, August 11, 2022 at 9:53:33 PM UTC-7 Kevin A. wrote:

> I feel like PIRs are a must on most nix clocks. Why burn up tubes when no 
> one is around to enjoy the glow? Seems like a total waste. 
>
> This may be detrimental in some cases.  For example, the B9771 spec sheet 
projects a lifetime of 50k hours, which is obviously a conservative 
estimate.  In my limited experience with 18 tubes in 3 clocks, the tubes 
have been used for over 350k hours (45+ years) with no failures; there has 
been some slight darkening of the glass (probably because the tubes were 
over driven compared to the spec sheet recommendations), but there are no 
signs of any imminent med for replacement.  The parts that have failed 
included power transformers, filter capacitors, LSI clock chips, and HV 
driver transistors on the anode side.  Based on this, it would not surprise 
me if the PIR device proved less reliable and needed replacement before the 
tubes would die a natural death. 

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Re: X-IMail-SPAM-Connection Re: [neonixie-l] Set of six GR10J on eBay!

[chuckrr]

Or you can simply add a toggle switch on the clock front that 
disconnects the high voltage to the tubes.

That way the clock runs dark until someone turns on the tubes.   Turn 
the tubes off when you leave the room.

Easy.  Simple. Effective.
 

 Original Message 
From: "Kevin A." 
Sent: 8/12/2022 12:54:18 AM
To: "neonixie-l" 
Subject: X-IMail-SPAM-Connection Re: [neonixie-l] Set of six GR10J on 
eBay!
 

I feel like PIRs are a must on most nix clocks. Why burn up tubes when 
no one is around to enjoy the glow? Seems like a total waste. 

 

For older stuff that doesn't have PIR compatability built in, 
you can always get an external PIR controlled switch: 
https://www.amazon.com/gp/aw/d/B00KAB4CRG?psc=1=ppx_pop_mob_b_asin_title




On Thu, Aug 11, 2022, 9:36 PM Nicholas Stock 
 wrote:


Datasheet does give an expected lifetime of 10,000 hrs, 
which is pretty good. Put a PIR on a clock with them and it'll last a long 
time...



On Thu, Aug 11, 2022 at 6:17 PM Audrey 
 wrote:


> No Hg

 

That's quite unfortunate for 
such nice tubes




On Thu, Aug 11, 2022, 8:51 PM 
Nicholas Stock  wrote:


No Hg in those puppies 
IIRC.



On Thu, Aug 11, 
2022 at 3:43 PM Audrey  wrote:


To 
infinity and beyond...




On Thu, Aug 11, 2022, 6:42 PM Dekatron42  wrote:


A set of six GR10J on eBay: https://www.ebay.com/itm?itemId=134195749943=1


 


Not my listing….



 



 



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