Re: [neonixie-l] Re: IN-28's in real life...

I just bought another one of those power supplies Paul! They're awesome and work perfectly for what we love! The ten turn potentiometers and going up to 500 volts works great for even dekatrons! I like the design of them too... they have that old school feel with the knobs, build quality,

Re: [neonixie-l] Re: IN-28's in real life...

It actually looks like the diodes are used for tubes that are shared between segments. > On Oct 9, 2019, at 4:14 PM, Tyler Bourne wrote: > >  > Nice boards. Looks like they are driven quite differently than mine. Diode > steering maybe? > -- > You received this message because you are

[neonixie-l] Re: IN-28's in real life...

Nice boards. Looks like they are driven quite differently than mine. Diode steering maybe? -- 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] Re: IN-28's in real life...

Indeed, I like these nixies. If you make a board, I'll get some more 28's and build it. This is a FANTASTIC find! Congratulations! On Thursday, May 23, 2019 at 12:15:55 PM UTC-4, Tyler Bourne wrote: > > The clock has arrived! It's Huge! > It seems like the clock was in the process of being

[neonixie-l] Re: IN-28's in real life...

Adventures with IN-28s. I have determined that in this clock the IN-28s are operated in the following way: The anode is connected to half wave rectified 240V AC, the cathode is grounded through a 4.7K resistor. The grid is connected to the control board through a 1M resistor with a 3.9M

RE: [neonixie-l] Re: IN-28's in real life...

-l Subject: [neonixie-l] Re: IN-28's in real life... Odd this site shows the К134ЛБ1 as quad NAND gates? http://ivatv.narod.ru/zifrovaja_texnika/1_02.htm -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this grou

[neonixie-l] Re: IN-28's in real life...

Odd this site shows the К134ЛБ1 as quad NAND gates? http://ivatv.narod.ru/zifrovaja_texnika/1_02.htm -- 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] Re: IN-28's in real life...

Thanks Dekatron42 didn't know of that list. Google translate does give me some information but it can still be hard to follow since Google translate is not very good with technical documents. Thanks again Kosbo, the translation makes more sense now. Too bad the old datasheet doesn't list

[neonixie-l] Re: IN-28's in real life...

No, it's not quad NOR gates. Looks like It has 3 different elements in one case: 4inputs NOR gate 4inputs NAND gate 1input inverter -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails

[neonixie-l] Re: IN-28's in real life...

There is a list here of Russian ic's showing which western TTL ic's they correspond to, that has helped me before: https://ganswijk.home.xs4all.nl/chipdir/soviet/ttl.htm Yours are not on that list as they are of a somewhat different type, but by using Google Translate with the text in the

[neonixie-l] Re: IN-28's in real life...

Thank you both! One more i'm not totally sure of: http://ielekt.ru/products_html/134lb2a.html Might be quad NOR gates? -- 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

[neonixie-l] Re: IN-28's in real life...

I do speak Russian and Yes Mike is right, it's quad D-type flip flop with TTL level input/outputs... -- 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] Re: IN-28's in real life...

I don't speak Russian, but it looks like a quad D-type flip flop. Almost like a 74LS175 but that has a common clock while the part in question has separate clocks per pair of flops. I guess you could try a pair of 74LS74 /mike On Tuesday, July 30, 2019 at 8:59:00 PM UTC-4, Tyler Bourne wrote:

[neonixie-l] Re: IN-28's in real life...

I've gotten back to work on fixing this clock but I'm stuck on a chip. It's a 134РМ1. I found a sort of datasheet here: https://eandc.ru/pdf/mikroskhema/k134rm1.pdf Translation doesn't really help much with this one though, something about storage elements. Can any of our Russian speakers

Re: [neonixie-l] Re: IN-28's in real life...

When I was in college at OSU we ran a 12 node ringdown BBS with all USR 16.8 modems. We used node PC's connected by netware 3.1. Each PC ran two USR 16.8 modems online simultaneously and we had 6 node machines on the network. We ran a proprietary underground BBS software called celerity.

Re: [neonixie-l] Re: IN-28's in real life...

When I was in college at OSU we ran a 12 node ringdown BBS with all USR 16.8 modems. We used node PC's connected by netware 3.1. Each PC ran two USR 16.8 modems online simultaneously and we had 6 node machines on the network. We ran a proprietary underground BBS software called celerity. Most

Re: [neonixie-l] Re: IN-28's in real life...

On Friday, May 31, 2019 at 11:02:10 PM UTC-4, charles wrote: > > I was always sad about Gandalf, they kinda Zigged when everyone else > zagged. Way Back when I recall showing one of their engineers one of > the First HAYES modems -and I asked why Gandalf was not in the market. > He answered

Re: [neonixie-l] Re: IN-28's in real life...

On 2019-05-31 10:36 p.m., Terry Kennedy wrote: Gandalf Quad PACX IV which was a 1024-terminal to 512-host-port concentrator. Each port had 4 red LEDs, so a total of 6144 LEDs. It also had a "lamp test" button. I bet you can see where this is going... Those LEDs gave off enough IR that you

Re: [neonixie-l] Re: IN-28's in real life...

On Thursday, May 30, 2019 at 5:59:48 PM UTC-4, gregebert wrote: > > My big clock simulates clock-hands with 306 NE-2H bulbs; during self-test, > all of them light-up and you can actually *feel* the light on your face. > It's a weird sensation because the bulbs dont actually heat-up and >

Re: [neonixie-l] Re: IN-28's in real life...

I haven't gone over the power supply yet. It looks like the main transformer is missing. If I can figure out what voltages it needs I can find/make a replacement. The wires from the socket to the transformer look incredibly thin. With all digits lit it must draw around 150-200 watts if each

Re: [neonixie-l] Re: IN-28's in real life...

Sounds like you could light up a stadium with it! On Thursday, May 30, 2019 at 2:59:48 PM UTC-7, gregebert wrote: > > My big clock simulates clock-hands with 306 NE-2H bulbs; during self-test, > all of them light-up and you can actually *feel* the light on your face. > It's a weird sensation

Re: [neonixie-l] Re: IN-28's in real life...

My big clock simulates clock-hands with 306 NE-2H bulbs; during self-test, all of them light-up and you can actually *feel* the light on your face. It's a weird sensation because the bulbs dont actually heat-up and re-radiate in that short of time. -- You received this message because you are

Re: [neonixie-l] Re: IN-28's in real life...

These things won't light reliably at 175V. In my experience you will need more like 240V. On Thursday, May 30, 2019 at 4:16:46 PM UTC-4, ZY wrote: > > What is your plan for powering this display? I ask because I also have 4 > modules that I'm trying to get to work. > > As far as I can see, at

Re: [neonixie-l] Re: IN-28's in real life...

What is your plan for powering this display? I ask because I also have 4 modules that I'm trying to get to work. As far as I can see, at 13mA per tube, lighting all 23 digits requires 0.3A, which at 175V is like 52 watts? And that's just one of the digits. -- You received this message because

Re: [neonixie-l] Re: IN-28's in real life...

A matrix would be more useful. Could make them tileable too. I have to make a replacement for this clock though so I will have extra 7segment boards of this shape. -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group

Re: [neonixie-l] Re: IN-28's in real life...

Nice. I think a board that can drive a matrix of these would be more versatile? Sent from my iPhone > On May 23, 2019, at 13:14, Tyler Bourne wrote: > > Minutes board, This one will be the one I replicate since it can display all > digits and should be the same as the missing Hours Board. >

Re: [neonixie-l] Re: IN-28's in real life...

Tyler, The board markings are incongruous. The resistors in one photo are marked R1 through R6. but the character "R" is not in the Cyrillic alphabet. There is also a "V1" designation, which is not a Cyrillic character, either.  Voltage would have been designated with a "B" character. The

[neonixie-l] Re: IN-28's in real life...

To see the images at full size remove the =S400 from the end of the URL. -- 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.

[neonixie-l] Re: IN-28's in real life...

[neonixie-l] Re: IN-28's in real life...

> > > > >

[neonixie-l] Re: IN-28's in real life...

The clock has arrived! It's Huge! It seems like the clock was in the process of being stripped for parts when it was saved. The tens of hours board was covered in nasty flux, probably the plumbing kind. I've cleaned it up and put it back in. I've created a schematic for the display board

[neonixie-l] Re: IN-28's in real life...

I did! I will reverse engineer it and make a replacement board. I will order 10 of them unless anyone else wants to buy(or trade for) some. In the pictures it looks like there is a board that holds the tubes and a driver board on the back. I will try and make the tube boards as universal as

[neonixie-l] Re: IN-28's in real life...

Did you get it? -- 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 post to this group, send an email to

[neonixie-l] Re: IN-28's in real life...

If I get the clock I will have to design a replacement board. Since they come in packs of 5 or 10 I would have a bunch of extra... On Monday, May 13, 2019 at 3:29:24 PM UTC-4, Pramanicin wrote: > > >

[neonixie-l] Re: IN-28's in real life...

That is cool! I've submitted an offer. On Monday, May 13, 2019 at 3:29:24 PM UTC-4, Pramanicin wrote: > > > https://www.ebay.com/itm/Vintage-HUGE-Industrial-NIXIE-secondary-clock-110x40-cm-IN-28-based-magic-eye-/173902111454?&_trksid=p2056016.l4276 > > Never seen one like this...cool. I have a