Thank you Terry, I know understand why this odd tube behaviour. Excellent articles btw!
From: <[email protected]> on behalf of Terry Kennedy <[email protected]> Reply-To: "[email protected]" <[email protected]> Date: Friday, 30 June 2017 at 04:11 To: neonixie-l <[email protected]> Subject: Re: [neonixie-l] ILVM1-1/7 Type I VFD tubes On Thursday, June 29, 2017 at 2:43:03 PM UTC-4, kosbo.com wrote: Is far as I remember, combined segments are used to simplify circuit to make seven segment style digits on the clock matrix look like display. I know that IV-26 ( just bigger than IV-25) has 3 modification types: type 1( all dots are separated) type2 and type3. Type 2 and type3 have combined segments depends on their vertical or horizontal layout position in the clock. They have been used in “Электроника 7” clocks, which were very popular in offices and factories in Soviet time. I think IVLM1-1/7 Type1 were designed in similar manner to make dot matrix clock like in “Электроника 7”, but smaller. I have blogged about the Elektronika 7 a few times. Those entries go into a fair amount of detail about the clocks and the dot matrix tubes in them: https://www.glaver.org/blog/?s=elektronika+clock I don't know about the IV-25, but the IV-26 tubes start dimming pretty rapidly after being on for some time. When first installed, the phosphor dots are brighter under the filament. Within a day or two this changes to an even illumination. After some thousands of hours, the dots start to be dimmer under the filament, until they are almost not lit at all. New tubes in left 2 digits, older tubes on right: [https://lh3.googleusercontent.com/-LG9MCWy0HRY/WVWzNXiSEKI/AAAAAAAAACU/LV1fIiLsTY4lOYmcVi19O8XJCBBVSI92ACLcBGAs/s320/6F5S8704-s.jpg]<https://lh3.googleusercontent.com/-LG9MCWy0HRY/WVWzNXiSEKI/AAAAAAAAACU/LV1fIiLsTY4lOYmcVi19O8XJCBBVSI92ACLcBGAs/s1600/6F5S8704-s.jpg> -- You received this message because you are subscribed to a topic in the Google Groups "neonixie-l" group. To unsubscribe from this topic, visit https://groups.google.com/d/topic/neonixie-l/O3Aa-2ahv88/unsubscribe. To unsubscribe from this group and all its topics, send an email to [email protected]<mailto:[email protected]>. To post to this group, send email to [email protected]<mailto:[email protected]>. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/477f502e-83e4-44d9-9491-21cddd1fd7a3%40googlegroups.com<https://groups.google.com/d/msgid/neonixie-l/477f502e-83e4-44d9-9491-21cddd1fd7a3%40googlegroups.com?utm_medium=email&utm_source=footer>. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/HE1PR1001MB10832B8B77C0C4607CF6105CF6D30%40HE1PR1001MB1083.EURPRD10.PROD.OUTLOOK.COM. For more options, visit https://groups.google.com/d/optout.
