If anyone is interested, then I have 50 pcs. MTX-90. вс, 18 апр. 2021 г. в 05:23, Yohan Park <w...@kitsunegari.net>:
> Yes, the ones I have also use an M22K (220K) resistor. > The tubes in mine aren't labeled at all but they're the more common MTH-90 > tube without a nipple on top and the unit has clear lenses. > They come without any screws to attach the top cover to the lower part of > the case so it seems they're meant to be screwed on to something else. > > On Sunday, April 18, 2021 at 2:11:34 AM UTC+2 Terry Bowman wrote: > >> I did a quick search and these these things are for sale on Etsy and >> various other merchant sites I've never heard of. Similar pricing but eBay >> does give you something resembling a safety net. >> >> White plastic with red lenses seems to be the norm. >> >> >> On Apr 17, 2021, at 5:49 AM, Dekatron42 <martin....@gmail.com> wrote: >> >> I had one of these many years ago and if I remember correctly now it is a >> resistor of some 100k, or perhaps it was closer to 1Meg, as it just limits >> the current flowing in the trigger circuit. You can google these and find >> circuits like the ones below: >> >> >> I finally dug a meter out and checked the component marked "M22". Sure >> enough it's a .22MΩ (220kΩ) resistor. It's connected directly to the >> touch-sensitive "key" on the front. >> >> >> On Apr 17, 2021, at 3:21 PM, Yohan Park <w...@kitsunegari.net> wrote: >> >> Ah yes I've found them. They're less suitable to use as an indicator. >> >> >> The tubes in the ones I purchased are identical. There's no part number >> and the only marking is "OTK 25". Apparently that means that quality >> control inspector number 25 has approved the lamp as military spec. Feel >> free to correct me if I'm wrong. >> >> I still can't figure out what they were used for. Functionally they're >> just a box with five momentary sort-of isolated touch switches controlling >> a 220V RMS mains load. Cheaper than using mechanical switches? >> >> >> Terry Bowman, KA4HJH >> "The Mac Doctor" >> >> https://www.astarcloseup.com/ >> >> “...the book said something astonishing, a very big thought. The stars, >> it said, were suns but very far away. The Sun was a star but close >> up.”—Carl Sagan, "The Backbone Of Night", *Cosmos*, 1980 >> >> >> -- > 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/ae09cd57-25c2-408e-9a0c-15f3c9cc5394n%40googlegroups.com > <https://groups.google.com/d/msgid/neonixie-l/ae09cd57-25c2-408e-9a0c-15f3c9cc5394n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CAFbEjqhqL7RU2CrESfRrkwk6AJhk5xo8VMvFEu30Wabzi3jL4Q%40mail.gmail.com.