Re: [neonixie-l] Interesting NOS Neon bulbs

[Terry Kennedy]

I had both the neon and argon versions in standard bases. The resistor was 
inside the base (actually on one of the wire legs next to the evacuation 
nipple. The other end went to the pin (not screw) part of the base.

On Sunday, February 12, 2023 at 12:49:23 AM UTC-5 gregebert wrote:

> I had a bulb similar to the NE42, except it had a standard Edison base and 
> worked in a lamp socket. Oddly, no series resistor required; maybe it was 
> hidden inside the base ?
>
>  It wasn't bright, but it was interesting to fire it up now and 
> then..until an accident in the garage broke the bulb. Most of the neon 
> devices are kept in steel ammo boxes now.
>
> On Saturday, February 11, 2023 at 1:22:08 PM UTC-8 padler...@gmail.com 
> wrote:
>
>> …and shipping costs are always a surprise as they don't calculate 
>> shipping at checkout, but rather select the shipping method at their 
>> discretion and charge your card without contacting you first. I’ve been 
>> shocked a few times when I saw the invoice! 
>>
>>
>> On Feb 11, 2023, at 1:11 PM, Nicholas Stock  wrote:
>>
>> 
>>
>> I've bought items from them before, the product is always good, but their 
>> prices are creeping up into the OMG range on a few items 
>>
>> On Sat, Feb 11, 2023 at 7:53 AM Neil QQ  wrote:
>>
>>> I see this place has been mentioned here before but it was quite a few 
>>> years ago.  Their offerings slowly rotate.  Many common/mundane, but 
>>> occasionally interesting, items.
>>>
>>> https://www.surplussales.com/Bulbs-Incan-Panel/BulbsNeon.html
>>>
>>>
>>>
>>>   
>>>
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>>> 
>>> .
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>> 
>> .
>>
>>

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Re: [neonixie-l] Interesting NOS Neon bulbs

['bogdan paduraru' via neonixie-l]

 Thank you Benoit 

I have checked the website on my phone and did not spot the link 

On Sunday, February 12, 2023 at 11:41:37 AM GMT+2, Benoit Tourret 
 wrote:  
 
 click on "Click here to see lamp lit up " and you will see this:

Le dimanche 12 février 2023 à 07:05:51 UTC+1, bogdanpadur...@yahoo.com a écrit :

Those NE-42 s look interesting ; does any one had a photo with that thing lit?

Sent from my iPhone

On 12 Feb 2023, at 07:49, gregebert  wrote:



I had a bulb similar to the NE42, except it had a standard Edison base and 
worked in a lamp socket. Oddly, no series resistor required; maybe it was 
hidden inside the base ?


 It wasn't bright, but it was interesting to fire it up now and then..until 
an accident in the garage broke the bulb. Most of the neon devices are kept in 
steel ammo boxes now.

On Saturday, February 11, 2023 at 1:22:08 PM UTC-8 padler...@gmail.com wrote:

…and shipping costs are always a surprise as they don't calculate shipping at 
checkout, but rather select the shipping method at their discretion and charge 
your card without contacting you first. I’ve been shocked a few times when I 
saw the invoice! 



On Feb 11, 2023, at 1:11 PM, Nicholas Stock  wrote:





I've bought items from them before, the product is always good, but their 
prices are creeping up into the OMG range on a few items 
On Sat, Feb 11, 2023 at 7:53 AM Neil QQ  wrote:

I see this place has been mentioned here before but it was quite a few years 
ago.  Their offerings slowly rotate.  Many common/mundane, but occasionally 
interesting, items.
https://www.surplussales.com/Bulbs-Incan-Panel/BulbsNeon.html


  

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[neonixie-l] Re: Tubes failing with internal digit-anode shorts (Burroughs B5750s)

[andybiker]

 Jamie,

I have had exactly this problem with these B5750 tubes!
I'm glad it's not just me.
I've had 7 open circuit, I had 4 shorted to another digit, I had another 
tube with a resistance between two digits - not a full short!
These were also on boards that had a lot of hours on them and looked a 
little physically beaten up.
Out of 8 tubes, 4 had faults.
These were on two boards multiplexed with a wierd DTL decoder (with 
inverted binary) and 1960s pcb.

Cheers,
Andrew


On Sunday, February 12, 2023 at 10:14:50 PM UTC James Montgomerie wrote:

> Hey folks,
>
> Been lurking for years, but just joined properly now. I designed and made 
> a clock myself a few years ago, using Burroughs B5750s on ‘original’ 
> vintage carrier cards (pics attached, though I don’t think they’re 
> important to the question I have). The clocks have been working for a year 
> or two (and the pictures show them when they were working), but they have 
> started to fail in a way that surprises me. 
>
> The anode resistors burn out and (unsurprisingly) the displays stop 
> working. Analyzing at the components after a failure, the thing that sticks 
> out to me is that the tubes themselves seem to have shorts in them. In one 
> case, the ‘0’ has shorted to the anode. In another case the ‘4’ has shorted 
> to the anode. Given this I think what must be happening is that the tubes 
> develop these shorts, this causes too much current to be drawn when these 
> numbers are meant to be illuminated, and in turn this causes the anode 
> resistor to burn out. 
>
> Sometimes, before the failure, multiple numbers light at once, and/or the 
> front of the tubes get silvered, but I’m not sure this is related. I think 
> the multiple-numbers-at-once might be being caused by the ground-side 
> control circuitry having to sink too much current from the short.
>
> The repair is easy - replace the tube and anode resistor, but I’d like to 
> understand the problem better and perhaps prevent it. 
>
> The power supplies seem fine, and both the supply voltage and the voltage 
> across the anode resistor (and, by implication, current - about 2.6mA) are 
> good when the tube and resistor are replaced.
>
> Is a dead short internal to the tube a common fault I should be preparing 
> for? Could it be caused by power surges or the like (in at least one case, 
> the clock seemed to fail immediately after a power cut)? Is it likely that 
> something in my circuit design could be is causing or encouraging this?
>
> Thanks for any help!
> Jamie.
>
>

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