[neonixie-l] Re: The difference between IV4 and IV17 vfd tubes

2012-08-21 Thread fixitsan
On Monday, August 20, 2012 11:05:15 PM UTC+1, Terry Kennedy wrote: On Aug 20, 8:13 am, Jon Jackson jondad...@gmail.com wrote: Does anyone still have this document available or a link to it? I have some IV-4s as well as IV-17s to use in a 4play display. I've put a copy at:

[neonixie-l] Re: The difference between IV4 and IV17 vfd tubes

2012-08-21 Thread figureloop
On Monday, November 21, 2011 12:51:05 AM UTC-8, fixitsan wrote: The 1000 hours lifetime is hopefully a misprint, there shouldn't be that much difference in the build to shorten it by 9000 hours and why continue to build a vastly inferior tube when you have a functionally identical

[neonixie-l] Re: The difference between IV4 and IV17 vfd tubes

2012-08-21 Thread figureloop
On Sunday, November 20, 2011 2:43:40 PM UTC-8, fixitsan wrote: I've just had a look at all of the types of IV4 and IV17 tubes in my collection to try to establish what, if any, are the main differences. Due to the high res images producing a large file size I couldn't upload the document

[neonixie-l] Re: The difference between IV4 and IV17 vfd tubes

2012-08-21 Thread Terry Kennedy
On Aug 21, 2:01 pm, figureloop cr...@sbcglobal.net wrote: Thus, it is entirely possible that causes purely political or otherwise unknown and about which it is difficult to speculate account for the existence and simultaneous production of these nearly identical tubes. That's actually a

Re: [neonixie-l] Re: The difference between IV4 and IV17 vfd tubes

2012-08-21 Thread David Forbes
On 8/21/12 11:01 AM, figureloop wrote: Thus, it is entirely possible that causes purely political or otherwise unknown and about which it is difficult to speculate account for the existence and simultaneous production of these nearly identical tubes. It's not just the Soviet Union where things

Re: [neonixie-l] Re: The difference between IV4 and IV17 vfd tubes

2012-08-21 Thread Jon Jackson
Thanks, Terry, for posting the file. On Tue, Aug 21, 2012 at 1:23 PM, David Forbes dfor...@dakotacom.net wrote: On 8/21/12 11:01 AM, figureloop wrote: Thus, it is entirely possible that causes purely political or otherwise unknown and about which it is difficult to speculate account for the

[neonixie-l] Difference between ITS1A and ITS1B?

2012-08-21 Thread mar...@jave.de
Hello, this post is a little bit off-topic: it's about thyratrons, not nixies. You might have seen this article about the ITS1A: http://www.decadecounter.com/vta/articleview.php?item=1020 A few days ago there where some ITS1B on ebay (e.g. http://www.ebay.com/itm/280940038527). The first time

[neonixie-l] Re: Difference between ITS1A and ITS1B?

2012-08-21 Thread Terry Kennedy
On Aug 21, 3:51 pm, mar...@jave.de mar...@jave.de wrote: Does anyone know what's the difference between them? Is it just a newer production, or is it the color? Due to their weird voltage requirements I did not fire them up yet. From the outside there does not seem to be much of a

Re: [neonixie-l] Re: The difference between IV4 and IV17 vfd tubes

2012-08-21 Thread Charles MacDonald
On 12-08-21 03:23 PM, David Forbes wrote: I dutifully helped him disassemble the guns and tried to mate the orange left side with the green right side. However, they wouldn't fit. It turns out that the company had used two entirely different molds, Explain that, O masters of mass production!