That's all I can say. I hope you were interested, and the photos turned out to be quite informative, I used all my possibilities of photographing with a mobile phone. Write if you are interested in learning about the technological differences between other Soviet lamps and the devices in which they were used. I have something to say :) I was also interested to know if there are people who want to purchase this pre-production sample of IN12.
воскресенье, 20 февраля 2022 г. в 15:45:15 UTC+3, Alexander Kriegesart: > This picture shows the typical early 1970s white ceramic coating on the > wires inside the bulb. In the 80s, such a coating was discontinued.[image: > IMG_20220220_124606.jpg] > > воскресенье, 20 февраля 2022 г. в 15:44:40 UTC+3, Alexander Kriegesart: > >> And it is especially interesting to note the arrangement of the anode >> grid. The mesh is as fine as that of the IN1, IN2, IN8 tubes I have met >> earlier (I mean the tubes of the 70s of release) >> It can also be seen that the mesh is fixed by resistance welding on the >> frame. The surface of the frame is uneven and, in my experience with >> metal, is most similar to traces of electrochemical metal etching (which is >> also more typical for single items than for a serial product)[image: >> IMG_20220220_124412.jpg][image: IMG_20220220_124530.jpg] >> >> воскресенье, 20 февраля 2022 г. в 15:43:27 UTC+3, Alexander Kriegesart: >> >>> When compared, the dimensions of the flasks differ in the prototype and >>> serial tube.[image: IMG_20220214_223850.jpg][image: >>> IMG_20220215_000457.jpg][image: IMG_20220214_223959.jpg] >>> >>> воскресенье, 20 февраля 2022 г. в 15:42:17 UTC+3, Alexander Kriegesart: >>> >>>> I will show in the photo a comparison of the prototype with the oldest >>>> IN12 serial tube I have. >>>> >>>> As you can see, the Soviet idea of reducing the number of dies for >>>> the production of the number 5 was implemented in the IN12 series from the >>>> very beginning. (I mean the use of the inverted two as the number five) >>>> [image: IMG_20220220_142432.jpg] >>>> воскресенье, 20 февраля 2022 г. в 15:40:43 UTC+3, Alexander Kriegesart: >>>> >>>>> Hello World. I have been making watches for several years. And while >>>>> looking tubes for my projects, I came across one unique thing. >>>>> This is a pre-production prototype of the Soviet tube IN12. >>>>> I have always been interested in the history of technology >>>>> development. And the discovery of this pipe was a pleasant surprise. Too >>>>> bad I can't afford to collect tubes. But I am pleased to share this find >>>>> with the world.[image: IMG_20220214_142454.jpg] >>>>> [image: IMG_20220214_142501.jpg] >>>>> >>>>> >>>>> >>>>> -- 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 neonixie-l+unsubscr...@googlegroups.com. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/696b6a91-619b-4ef4-bef5-c692bb2b9158n%40googlegroups.com.
