Re: [neonixie-l] Re: Shipment delays from Ukraine

2020-12-02 Thread Christian Elzey
I also got some in-14s from Ukraine in about 10 days total, so that
shipping path is likely recovered.

On Wed, Dec 2, 2020, 7:06 PM gregebert  wrote:

> I'm happy to report my purchase of VFDs from Kiev, Ukraine arrived in
> about 2 weeks. So, maybe the delivery process has now recovered.
> Only took 1 day thru ISSC New York; in the past that was easily 5-7 days.
>
> On Sunday, July 26, 2020 at 5:16:02 PM UTC-7 Terry Bowman wrote:
>
>> On Jul 26, 2020, at 2:16 PM, Michail Wilson  wrote:
>>
>> I ordered a bunch of IV21 tubes on March 9 and they arrived on Thursday
>> (16th).  (Over 2 months).
>>
>>
>> I just received some Nixies from Poland. Left the country on 6/24, showed
>> up a few days ago. Tracking shows nothing after leaving Poland. At least
>> they got here in one piece. Well packed.
>>
>>
>> Terry Bowman, KA4HJH
>> "The Mac Doctor”
>>
>> "Never install version point-zero of anything"
>>
>> --
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Re: [neonixie-l] Re: Shipment delays from Ukraine

2020-12-02 Thread gregebert
I'm happy to report my purchase of VFDs from Kiev, Ukraine arrived in about 
2 weeks. So, maybe the delivery process has now recovered.
Only took 1 day thru ISSC New York; in the past that was easily 5-7 days.

On Sunday, July 26, 2020 at 5:16:02 PM UTC-7 Terry Bowman wrote:

> On Jul 26, 2020, at 2:16 PM, Michail Wilson  wrote:
>
> I ordered a bunch of IV21 tubes on March 9 and they arrived on Thursday (16
> th).  (Over 2 months).
>
>
> I just received some Nixies from Poland. Left the country on 6/24, showed 
> up a few days ago. Tracking shows nothing after leaving Poland. At least 
> they got here in one piece. Well packed.
>
>
> Terry Bowman, KA4HJH
> "The Mac Doctor”
>
> "Never install version point-zero of anything"
>
>

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Re: [neonixie-l] Safe handling of tubes containing Krypton 85

2020-12-02 Thread Mac Doktor

> On Dec 2, 2020, at 2:51 PM, SWISSNIXIE - Jonathan F.  
> wrote:
> 
> The last chart shows almost identical counts for the mantle on the SMB-20 
> (gamma tube) and the SBT-11A (alpha tube) i think that's the one Paul uses. 

Thorium is a good beta source. That's why the SBM-20 works so well.

There was a discussion about alpha windows on the GeigerCounters list a while 
back. The SBT-11/A has a window that's thicker than a "true" alpha tube. The 
larger Soviet "alpha" tubes with multiple anodes use a rather thick material 
that you can actually touch without popping it like a soap bubble.

As for smoke detectors, it is in fact illegal to open one up and use it as a 
source—in the US, anyway. At the same time it's legal to throw one in the trash 
so it can be crushed by a bulldozer while it's being buried in a landfill. This 
makes no sense, of course.

I have a couple that I use as alpha sources all the time. You can come to my 
house and confiscate them if you like. I can get more quite easily.


Terry Bowman, KA4HJH
"The Mac Doctor"

Q: Should car stereo speakers be pointed to the rear for more thrust or up for 
more traction?

A. On long trips, the 20- to 30% improvement in gas mileage you might get with 
speakers pointing to the rear is certainly worthwhile. On the other hand, if 
you drive on snow or ice, the extra traction of speakers pointing upward gives 
you added control.

Don Lancaster

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Re: [neonixie-l] Safe handling of tubes containing Krypton 85

2020-12-02 Thread SWISSNIXIE - Jonathan F.
Mantles contain alpha emitting isotopes, but are a bad example for testing 
tubes for alpha sensitivity. Here you can see a comparison of tubes
https://sites.google.com/site/diygeigercounter/technical/gm-tubes-supported

The last chart shows almost identical counts for the mantle on the SMB-20 
(gamma tube) and the SBT-11A (alpha tube) i think that's the one Paul uses. 



Paul Andrews schrieb am Mittwoch, 2. Dezember 2020 um 18:01:47 UTC+1:

> I have an old gas lamp mantle. Very active, but apparently not alpha - 
> interposing a piece of paper (as has been suggested) has no effect at all.
>
> On Dec 2, 2020, at 11:11 AM, alb.001 alb.001  wrote:
>
>  
>
> I have a few as well in the original packaging.   I find them at flea 
> markets and antique shows. All of the sellers are unaware of their 
> radioactivity.  I paid $2 for each. I have also found some old 
> pharmaceutical products such as corrosive sublimate pills ( contain 
> mercuric salts ) which were used to make disinfectant solutions.  Also 
> dangerous and never packaged in anything resembling child-resistant and 
> very poisonous.   I buy them to protect the public who might buy them as a 
> curiosity and not be aware of the danger they pose.
>
> Pharma Phil
>
> -- Original Message -- 
> From: GastonP  
> Date: December 1, 2020 at 10:00 PM 
>
> An old gas lamp mantle is good enough for the purpose, as its main 
> emission is alpha particles. It must be an old one because those ones use 
> thorium oxide to get its distinctive bright, while new ones don't use 
> thorium. I keep 3 of them, which I got from a local auction site, in a 
> small ziploc bag that saves me from touching the mantles themselves. 
>
>
> On Friday, November 27, 2020 at 8:10:19 AM UTC-3 Sgitheach wrote: 
>
> Would just a chunk of granite (or a granite kitchen worktop if you have 
> one) be good as a cheap starting point?
> On 27/11/2020 10:56, SWISSNIXIE - Jonathan F. wrote: 
>
> I advise against using smoke detectors. To detect heir alpha radiation, 
> you would have to disassemble the source until you get to the radioactive 
> isotope plated strip - or button - element. This is sort of not allowed, 
> and also can be very dangerous if you scratch off radioactive material. 
> From outside the detector you can only detect the Gammas from the Am-241 
> Also Quantities are sort of really high in these devices, depending on make 
> and model (1-100 uCi Am-241). If you really want to have alpha radiation, i 
> would purchase a Po-210 source from here: 
>
> https://www.spectrumtechniques.com/products/sources/disk-sources-and-source-sets/
>  
>
> They are like 60$, safe and legal to handle. Only disadvantage is short 
> half life of 138 days. 
> You also can find high power Po-210 sources here: 
> https://www.imagesco.com/geiger/radioactive-sources.html 
>
> Paul Andrews schrieb am Donnerstag, 26. November 2020 um 17:00:06 UTC+1: 
>
> And by 'alpha', I meant 'beta'. I actually did mean alpha, but I was 
> wrong. Still my old Geiger/Muller tube couldn't detect anything from these 
> nixies, so at least I can now detect beta particles. Now I need to find an 
> alpha source! Smoke detectors apparently. 
>
> On Thursday, November 26, 2020 at 10:27:17 AM UTC-5 Pramanicin wrote: 
>
> Still a bit of juice left! 
>
> Sent from my iPhone 
>
> On Nov 26, 2020, at 07:25, Paul Andrews < pa...@nixies.us> wrote: 
>
> Finally got an alpha detector for my GK-Mini geiger counter. First 
> picture is a regular nixie tube. Second is one doped with Kr85 
>  
>
>
>  
>
>
> On Friday, November 6, 2020 at 9:20:54 AM UTC-5 SWISSNIXIE - Jonathan F. 
> wrote: 
>
> Could also be Ra-226 on the 6140 
>
> gregebert schrieb am Mittwoch, 4. November 2020 um 16:32:02 UTC+1: 
>
> Maybe it's Thorium, used in the filaments. 
>
> On Wednesday, November 4, 2020 at 4:13:16 AM UTC-8 Paolo Cravero wrote: 
>
> Hi. 
> Let me add two pictures and a story. 
>
> Lately I picked up locally a bunch of small CRTs (2BP1, that also fit in 
> the vintage tuner currently on eBay, plus a Marantz) and the guy had a few 
> NIB tubes too. I was looking for gas-filled ones and that resulted in a 
> W.E. 6167 dekatron, some 0B2WA and some W.E. 6140/423A. Of particular 
> interest was the 6140 shown in the picture whose box mentions Kr85, but no 
> symbol on the glass. 
> When I came home I checked with a Geiger counter and SBM-20 probe (hard 
> beta and gamma particles) these tubes and the 6140 from 11/61 shows no 
> action. Same goes for other 6140 except for one, much older from 12/52 
> marked 423A. Neither the box nor the glass carry any warning sign, but this 
> tube hits >600 CPM vs 40 CPM background when put close to the SBM-20 probe 
> (it's not the right way to measure radiation, but it's cool :) ). There is 
> definitely something else than Kr-85 in there! I have blurred pics of it 
> and it has been stored away from home. 
>
> As already mentioned, Nixies did contain Kr-85 and I knew I had one 
> clearly 

Re: [neonixie-l] Safe handling of tubes containing Krypton 85

2020-12-02 Thread Paul Andrews
I have an old gas lamp mantle. Very active, but apparently not alpha - 
interposing a piece of paper (as has been suggested) has no effect at all.

> On Dec 2, 2020, at 11:11 AM, alb.001 alb.001  wrote:
> 
> 
> I have a few as well in the original packaging.   I find them at flea markets 
> and antique shows. All of the sellers are unaware of their radioactivity.  I 
> paid $2 for each. I have also found some old pharmaceutical products such as 
> corrosive sublimate pills ( contain mercuric salts ) which were used to make 
> disinfectant solutions.  Also dangerous and never packaged in anything 
> resembling child-resistant and very poisonous.   I buy them to protect the 
> public who might buy them as a curiosity and not be aware of the danger they 
> pose.
> 
> Pharma Phil
> 
>> -- Original Message -- 
>> From: GastonP  
>> Date: December 1, 2020 at 10:00 PM 
>> 
>> An old gas lamp mantle is good enough for the purpose, as its main emission 
>> is alpha particles. It must be an old one because those ones use thorium 
>> oxide to get its distinctive bright, while new ones don't use thorium. I 
>> keep 3 of them, which I got from a local auction site, in a small ziploc bag 
>> that saves me from touching the mantles themselves.
>> 
>> 
>> On Friday, November 27, 2020 at 8:10:19 AM UTC-3 Sgitheach wrote: 
>> Would just a chunk of granite (or a granite kitchen worktop if you have one) 
>> be good as a cheap starting point?
>> 
>>> On 27/11/2020 10:56, SWISSNIXIE - Jonathan F. wrote: 
>>> I advise against using smoke detectors. To detect heir alpha radiation, you 
>>> would have to disassemble the source until you get to the radioactive 
>>> isotope plated strip - or button - element. This is sort of not allowed, 
>>> and also can be very dangerous if you scratch off radioactive material. 
>>> From outside the detector you can only detect the Gammas from the Am-241 
>>> Also Quantities are sort of really high in these devices, depending on make 
>>> and model (1-100 uCi Am-241). If you really want to have alpha radiation, i 
>>> would purchase a Po-210 source from here: 
>>> https://www.spectrumtechniques.com/products/sources/disk-sources-and-source-sets/
>>>  
>>> 
>>> They are like 60$, safe and legal to handle. Only disadvantage is short 
>>> half life of 138 days.
>>> You also can find high power Po-210 sources here: 
>>> https://www.imagesco.com/geiger/radioactive-sources.html 
>>> 
>>> Paul Andrews schrieb am Donnerstag, 26. November 2020 um 17:00:06 UTC+1: 
>>> And by 'alpha', I meant 'beta'. I actually did mean alpha, but I was wrong. 
>>> Still my old Geiger/Muller tube couldn't detect anything from these nixies, 
>>> so at least I can now detect beta particles. Now I need to find an alpha 
>>> source! Smoke detectors apparently. 
>>> 
>>> On Thursday, November 26, 2020 at 10:27:17 AM UTC-5 Pramanicin wrote: 
>>> Still a bit of juice left! 
>>> 
>>> Sent from my iPhone
>>> 
 On Nov 26, 2020, at 07:25, Paul Andrews < pa...@nixies.us> wrote: 
 
 Finally got an alpha detector for my GK-Mini geiger counter. First 
 picture is a regular nixie tube. Second is one doped with Kr85
 
>>> 
 
 
 
 
 On Friday, November 6, 2020 at 9:20:54 AM UTC-5 SWISSNIXIE - Jonathan F. 
 wrote: 
 Could also be Ra-226 on the 6140 
 
 gregebert schrieb am Mittwoch, 4. November 2020 um 16:32:02 UTC+1: 
 Maybe it's Thorium, used in the filaments. 
 
 On Wednesday, November 4, 2020 at 4:13:16 AM UTC-8 Paolo Cravero wrote: 
 Hi.
 Let me add two pictures and a story.
 
 Lately I picked up locally a bunch of small CRTs (2BP1, that also fit in 
 the vintage tuner currently on eBay, plus a Marantz) and the guy had a few 
 NIB tubes too. I was looking for gas-filled ones and that resulted in a 
 W.E. 6167 dekatron, some 0B2WA and some W.E. 6140/423A. Of particular 
 interest was the 6140 shown in the picture whose box mentions Kr85, but no 
 symbol on the glass.
 When I came home I checked with a Geiger counter and SBM-20 probe (hard 
 beta and gamma particles) these tubes and the 6140 from 11/61 shows no 
 action. Same goes for other 6140 except for one, much older from 12/52 
 marked 423A. Neither the box nor the glass carry any warning sign, but 
 this tube hits >600 CPM vs 40 CPM background when put close to the SBM-20 
 probe (it's not the right way to measure radiation, but it's cool :) ). 
 There is definitely something else than Kr-85 in there! I have blurred 
 pics of it and it has been stored away from home. 
 
 As already mentioned, Nixies did contain Kr-85 and I knew I had one 
 clearly marked. It's a Burroughs Self-Scan display that probably needed 
 some "doping" to handle the almost 1 MHz scan rate. BTW, it contains gas 
 and I might never use it, so if someone wants to experiment with self-scan 
 contact me off the list.
 
 One question 

Re: [neonixie-l] Safe handling of tubes containing Krypton 85

2020-12-02 Thread alb.001 alb.001

 
  I have a few as well in the original packaging.   I find them at flea markets and antique shows. All of the sellers are unaware of their radioactivity.  I paid $2 for each. I have also found some old pharmaceutical products such as corrosive sublimate pills ( contain mercuric salts ) which were used to make disinfectant solutions.  Also dangerous and never packaged in anything resembling child-resistant and very poisonous.   I buy them to protect the public who might buy them as a curiosity and not be aware of the danger they pose.
  Pharma Phil
  
   -- Original Message --
   From: GastonP 
   Date: December 1, 2020 at 10:00 PM
   
   
   
An old gas lamp mantle is good enough for the purpose, as its main emission is alpha particles. It must be an old one because those ones use thorium oxide to get its distinctive bright, while new ones don't use thorium. I keep 3 of them, which I got from a local auction site, in a small ziploc bag that saves me from touching the mantles themselves.
   
   

   
   
   

 On Friday, November 27, 2020 at 8:10:19 AM UTC-3 Sgitheach wrote:
 


 
  Would just a chunk of granite (or a granite kitchen worktop if you have one) be good as a cheap starting point?
 
 
  
   On 27/11/2020 10:56, SWISSNIXIE - Jonathan F. wrote:
   
  
 
 
  
   I advise against using smoke detectors. To detect heir alpha radiation, you would have to disassemble the source until you get to the radioactive isotope plated strip - or button - element. This is sort of not allowed, and also can be very dangerous if you scratch off radioactive material. From outside the detector you can only detect the Gammas from the Am-241 Also Quantities are sort of really high in these devices, depending on make and model (1-100 uCi Am-241). If you really want to have alpha radiation, i would purchase a Po-210 source from here:

   https://www.spectrumtechniques.com/products/sources/disk-sources-and-source-sets/

   
   
They are like 60$, safe and legal to handle. Only disadvantage is short half life of 138 days. 

   
   
You also can find high power Po-210 sources here: 
https://www.imagesco.com/geiger/radioactive-sources.html

   
   
   

 Paul Andrews schrieb am Donnerstag, 26. November 2020 um 17:00:06 UTC+1:
 


 And by 'alpha', I meant 'beta'. I actually did mean alpha, but I was wrong. Still my old Geiger/Muller tube couldn't detect anything from these nixies, so at least I can now detect beta particles. Now I need to find an alpha source! Smoke detectors apparently.
  
 
 
  
   On Thursday, November 26, 2020 at 10:27:17 AM UTC-5 Pramanicin wrote:
   
  
  
   
Still a bit of juice left!
 


 Sent from my iPhone


 
 
  On Nov 26, 2020, at 07:25, Paul Andrews <
  pa...@nixies.us> wrote:
   
  
 


 
  Finally got an alpha detector for my GK-Mini geiger counter. First picture is a regular nixie tube. Second is one doped with Kr85
  
   

   
  
 

   
   

 
  
   
  
  
   

   

   
  
  
   
On Friday, November 6, 2020 at 9:20:54 AM UTC-5 SWISSNIXIE - Jonathan F. wrote:

   
   
Could also be Ra-226 on the 6140
 


 
  gregebert schrieb am Mittwoch, 4. November 2020 um 16:32:02 UTC+1:
  
 
 
  Maybe it's Thorium, used in the filaments.
   
  
  
   
On Wednesday, November 4, 2020 at 4:13:16 AM UTC-8 Paolo Cravero wrote:

   
   

 
  Hi.
 
 
  Let me add two pictures and a story.
 
 
  
 
 
  Lately I picked up locally a bunch of small CRTs (2BP1, that also fit in the vintage tuner currently on eBay, plus a Marantz) and the guy had a few NIB tubes too. I was looking for gas-filled ones and that resulted in a W.E. 6167 dekatron, some 0B2WA 

Re: [neonixie-l] Safe handling of tubes containing Krypton 85

2020-12-02 Thread Nick Andrews
The source in a US market ionization smoke detector is very small, under 1
uCi and Am-241.  The material is plated on a small ~1/4" button and
typically sealed.  They are pretty safe and you could most likely eat it
without any issues.  However, it is technically illegal to remove the
source and use it for other purposes.  You could open it up for cleaning
and calibration purposes...  The ones with higher amounts which are less
safe are the old Pyrotronics F5 smoke detectors often sold on ebay for
$100+.  Those contain multiple sources which in some vintages are known to
shed material and contaminate things.

Po-210 is also used in industrial and photographic dust removal products.
Check out the Staticmaster brushes for removing dust from film negatives.

For legal, exempt quantity sources, direct purchase from Spectrum
Techniques is the best, as they are pretty much the only manufacturer
around and all the others buy from them. In fact, your source will be
shipped directly from them to you no matter who you buy it from.

On Fri, Nov 27, 2020 at 4:56 AM SWISSNIXIE - Jonathan F. <
jfrech...@gmail.com> wrote:

> I advise against using smoke detectors. To detect heir alpha radiation,
> you would have to disassemble the source until you get to the radioactive
> isotope plated strip - or button - element. This is sort of not allowed,
> and also can be very dangerous if you scratch off radioactive material.
> From outside the detector you can only detect the Gammas from the Am-241
> Also Quantities are sort of really high in these devices, depending on make
> and model (1-100 uCi Am-241). If you really want to have alpha radiation, i
> would purchase a Po-210 source from here:
>
> https://www.spectrumtechniques.com/products/sources/disk-sources-and-source-sets/
>
> They are like 60$, safe and legal to handle. Only disadvantage is short
> half life of 138 days.
> You also can find high power Po-210 sources here:
> https://www.imagesco.com/geiger/radioactive-sources.html
>
> Paul Andrews schrieb am Donnerstag, 26. November 2020 um 17:00:06 UTC+1:
>
>> And by 'alpha', I meant 'beta'. I actually did mean alpha, but I was
>> wrong. Still my old Geiger/Muller tube couldn't detect anything from these
>> nixies, so at least I can now detect beta particles. Now I need to find an
>> alpha source! Smoke detectors apparently.
>>
>> On Thursday, November 26, 2020 at 10:27:17 AM UTC-5 Pramanicin wrote:
>>
>>> Still a bit of juice left!
>>>
>>> Sent from my iPhone
>>>
>>> On Nov 26, 2020, at 07:25, Paul Andrews  wrote:
>>>
>>> Finally got an alpha detector for my GK-Mini geiger counter. First
>>> picture is a regular nixie tube. Second is one doped with Kr85
>>> 
>>>
>>>
>>> 
>>>
>>>
>>> On Friday, November 6, 2020 at 9:20:54 AM UTC-5 SWISSNIXIE - Jonathan F.
>>> wrote:
>>>
 Could also be Ra-226 on the 6140

 gregebert schrieb am Mittwoch, 4. November 2020 um 16:32:02 UTC+1:

> Maybe it's Thorium, used in the filaments.
>
> On Wednesday, November 4, 2020 at 4:13:16 AM UTC-8 Paolo Cravero wrote:
>
>> Hi.
>> Let me add two pictures and a story.
>>
>> Lately I picked up locally a bunch of small CRTs (2BP1, that also fit
>> in the vintage tuner currently on eBay, plus a Marantz) and the guy had a
>> few NIB tubes too. I was looking for gas-filled ones and that resulted 
>> in a
>> W.E. 6167 dekatron, some 0B2WA and some W.E. 6140/423A. Of particular
>> interest was the 6140 shown in the picture whose box mentions Kr85, but 
>> no
>> symbol on the glass.
>> When I came home I checked with a Geiger counter and SBM-20 probe
>> (hard beta and gamma particles) these tubes and the 6140 from 11/61 shows
>> no action. Same goes for other 6140 except for one, much older from 12/52
>> marked 423A. Neither the box nor the glass carry any warning sign, but 
>> this
>> tube hits >600 CPM vs 40 CPM background when put close to the SBM-20 
>> probe
>> (it's not the right way to measure radiation, but it's cool :) ). There 
>> is
>> definitely something else than Kr-85 in there! I have blurred pics of it
>> and it has been stored away from home.
>>
>> As already mentioned, Nixies did contain Kr-85 and I knew I had one
>> clearly marked. It's a Burroughs Self-Scan display that probably needed
>> some "doping" to handle the almost 1 MHz scan rate. BTW, it contains gas
>> and I might never use it, so if someone wants to experiment with 
>> self-scan
>> contact me off the list.
>>
>> One question for the knowledgeable people in here. I have some
>> Mullard Nixies marked "Kr-0A": has it got something to do with Kr-85? I
>> can't check with the Geiger since my probe does not detect Kr-85 
>> leftovers.
>>
>> So, if you are on the hunt for active tubes, better look for unmarked
>> pre-1960 editions and carry a Geiger counter with you ;)
>>
>> Paolo
>>
> --

Re: [neonixie-l] Lectrascan Unit

2020-12-02 Thread alb.001 alb.001

 
  probably no use to anyone.  It's been on eBay a long time now without any takers.  It's just a shell and belongs in the garbage.
  
  Pharma Phil
  
   
   
   
-- Original Message --
   From: Michail Wilson 
   Date: December 2, 2020 at 2:58 AM
   
   
   
Anyone have a clue of the value (if any) of a Lectrascan Unit?
No tubes and likely no driver boards.
I don’t think there is any power supply or controller.
 
Just the frame and plastic face.    (Maybe some driver boards)
 

 Michail Wilson

   
  
   
  
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