Great timing :D Just ordered 10 of these for $47 including shipping and all (seller agreed to put a low value on the package) after a bit of haggling. Yours look cleaner but mine don't have the orange filters in front of the tubes which I prefer because you see the real neon orange. I was wondering how to hook it up and what it was initially being used for too. Funny how things can suddenly pop up after all these years. I guess they were seen as useless until someone discovered there was neon inside... [image: case.jpg]
On Thursday, April 1, 2021 at 11:15:47 PM UTC+2 Terry Bowman wrote: > Recently these interesting little gadgets turned up on eBay (the following > are all seller photos): > > > I bought two of the above. After some haggling, shipping, and tax it added > up to just under $33. > > It pays to look at all of the listings. The colors and numbers on the > panel vary, and some don't have the cool red lenses. And some prices have > already gone up. If you add them to your watchlist you may get an offer. > > > Starting with the seller I purchased mine from: > > > https://www.ebay.com/itm/MTX-90-MTX90-MTH-90-touch-keypad-Soviet-military-thyratron-neon-bulb-indicator/322631444720 > > > https://www.ebay.com/itm/Sensor-module-ion-relay-5x-MTH-90-MTX-90-Military-Thyratron-Neon-Nixie-tubes-NOS/113874476705 > > > https://www.ebay.com/itm/Vtg-Touch-Keypad-Soviet-Military-5x-MTX-90-MTH-90-Thyratron-Neon-Nixie-Tubes-NOS/303275411917 > > > https://www.ebay.com/itm/MTH-90-MTX-90-Thyratron-Touch-Keypad-URSS-Military-Neon-Bulb-Indicator/173881988719 > > > On to the fun part. It contains five MTH-90s. The metal "keys" don't move. > They're touch-sensitive. They appear to be connected to the gates on the > thyratrons through capacitors (see further down). Here are some interior > shots: > > > > > > The capacitors (or whatever) are about the size of the old 5% 1/4W carbon > film resistors I bought at Radio Shack in the '80s, perhaps a little longer > and thinner. There are two "dot and cosine wave" markings, one rotated 180°: > > > > Unpolarized capacitors?? They're also marked "М22" and "ИВ9" (IV9). I > couldn't find decent picture so you'll have to take my word for it. > > In the photos from another listing the only thing visible (thanks to > Photoshop) on three of them is this: > > > It appears to be "8", "K" inside a "C" or semi-circle, and "O" or zero. > > > OK gang, what were these things used for and how do I hook them up? I know > there's 220V AC involved somewhere. I already have the data-sheet for the > MTH-90s. I'm hoping that someone else has already figured out the rest for > me. 8D > > > 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 > > -- 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/443ab771-db95-4775-94d7-99caa5ed2182n%40googlegroups.com.
