[neonixie-l] Amperex 8453 Counter tube

2020-10-28 Thread peter bunge
I searched on this tube and found nothing. Before I spend time designing a circuit to drive it, has any one already done so? I don't mean the circuit in the data sheet, I mean a solid state driver for the ten starter pins. Ehat does I.C. mean on pin 6? Or is it N/C as in Not Connected? -- You

Re: [neonixie-l] Re: Amperex 8453 Counter tube

2020-10-29 Thread peter bunge
> > On Thursday, 29 October 2020 01:23:14 UTC+1, peter bunge wrote: >> >> I searched on this tube and found nothing. >> Before I spend time designing a circuit to drive it, has any one already >> done so? >> I don't mean the circuit in the data sheet, I mea

[neonixie-l] Russian LP4 Trochotron

2020-11-06 Thread peter bunge
Has anyone actually used one of these? Does anyone have a picture of this tube with the magnet installed? Anyone have working schematics? -- 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

Re: [neonixie-l] Re: Russian LP4 Trochotron

2020-11-06 Thread peter bunge
e across any original drawings or photos where they > were shown in use. > > /Martin > > On Friday, 6 November 2020 20:52:49 UTC+1, peter bunge wrote: >> >> Has anyone actually used one of these? >> Does anyone have a picture of this tube with the magnet installed?

Re: [neonixie-l] IV-6 VFD came in different colors?

2020-11-26 Thread peter bunge
I don't see how they can be connected, especially the green one with twisted wires. Photoshop? On Thu, Nov 26, 2020 at 8:54 AM Yohan Park wrote: > I found this picture on spark-tube.com > The tubes are clearly lit with a UV light from the right side. > Has anyone ever come across these orange an

Re: [neonixie-l] CRT clock kit instructions

2020-12-11 Thread peter bunge
I bought the older kit from al-truism https://www.ebay.ca/itm/Oscilloscope-Clock-Kit-OSC4-4-original-vector-design-crt-Cathode-ray-tube-Scope/303740553122?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649 It worked without problems using a Russian 6LO1i CRT. You do require some skill to bu

[neonixie-l] First LED displays

2020-12-18 Thread peter bunge
Can anyone remember what the first LED displays looked like? My first experience was with a 3 digit multiplexed display with bubble magnifiers. Did these come out before the single 7 segment displays with bigger digits? Did Numitron incandescent come out before the LED displays? -- You received

[neonixie-l] Paralleling Nixies

2021-01-02 Thread peter bunge
Question 1. Has anyone tried paralleling two or three Nixies from a single 74141? I am making a working demonstration with a variety of vintage displays (Nixie, Dekatron, Numitron, Amperex 8453,etc) that will all count together from a common clock. Question 2. The data sheet for the IN16 says

Re: [neonixie-l] Paralleling Nixies

2021-01-02 Thread peter bunge
p on the power supply, to > give the same protection that the Zeners in the 74141 give. > > > > > > On Sat, Jan 2, 2021, 6:58 AM peter bunge wrote: > >> Question 1. Has anyone tried paralleling two or three Nixies from a >> single 74141? >> I am making a working

Re: [neonixie-l] Karlsson KA2000

2021-01-06 Thread peter bunge
https://www.ebay.ca/itm/RSQ-KA-2000-Mixing-Amplifier-karaoke/224285782514?hash=item34387971f2:g:~p4AAOSwKwNf3mNg On Wed, Jan 6, 2021 at 4:23 AM Richard Scales wrote: > On behalf of a colleague I am seeking a Karlsson KA2000 in working (or > near working) condition to purchase as a gift. > > If a

[neonixie-l] Driving an IV12 Vacuum Fluorescent

2021-01-29 Thread peter bunge
I need to drive a single IV12 vacuum fluorescent display from a BCD to 7 segment chip. I could use level shifters like the CD40109B or CD4504B but they don't have 7 devices in one chip (4 and 6) and only drive 18 volts which might work. I could use a ULN2803 transistor array with 7 pullup resisto

Re: [neonixie-l] Driving an IV12 Vacuum Fluorescent

2021-01-30 Thread peter bunge
UDN2981 and there's also a Toshiba version >>> (TDSsomething). They aren't BCD though - just one pin per segment, so that >>> might not be any good for your application depending on how many IO pins >>> you have spare .. >>> >>> David >

[neonixie-l] 8453/Z550M erratic

2021-02-10 Thread peter bunge
Using the schematic from the data sheet [image: 8453 Circuit.jpg] This works with the count moving around but other numbers flash erratically, especially close to the number that is supposed to be lit. *When I moved the bottom of C1 to the other side of R1 it works perfectly. It is rock steady

Re: [neonixie-l] 8453/Z550M erratic

2021-02-10 Thread peter bunge
That is the only sure > fire way I know of to attain noise-free performance from CMOS logic > > driving cold cathode tubes. That schematic there is a noisy deal. > > > > > > Original Message > From: "peter bunge" > Sent: 2/10/2021 8:15:21 P

Re: [neonixie-l] 8453/Z550M erratic

2021-02-10 Thread peter bunge
>>> resistor, which in turn drives the transistor base. Only then would I >>> dare to use the 4028to operate the buffer, which in turn operates the >>> >>> transistor base via appropriate high resistance. That is the only sure >>> fire way I know of to att

Re: [neonixie-l] 8453/Z550M erratic

2021-02-11 Thread peter bunge
ich in turn drives the transistor base. Only then would I >>>>> dare to use the 4028to operate the buffer, which in turn operates the >>>>> >>>>> transistor base via appropriate high resistance. That is the only >>>>> sure fir

Re: [neonixie-l] 8453/Z550M erratic

2021-02-11 Thread peter bunge
t;> >>>>>> That schematic is so wrong in so many ways. You need high voltage >>>>>> transistors operating the tube cathodes. >>>>>> >>>>>> You need high resistance drving the transistor bases. You need a >>>>>> bu

Re: [neonixie-l] 8453/Z550M erratic

2021-02-11 Thread peter bunge
e hand drawn notes of the designer. I think maybe I needed >>>>>>> to >>>>>>> have C1 directly on the socket pins and will try that tomorrow. >>>>>>> Thanks for your interest though but you are thinking Nixie Tubes, >>>>>>> this is a special tube

Re: [neonixie-l] 8453/Z550M erratic

2021-02-11 Thread peter bunge
ng the hand drawn notes of the designer. I think maybe I needed >>>>>>> to >>>>>>> have C1 directly on the socket pins and will try that tomorrow. >>>>>>> Thanks for your interest though but you are thinking Nixie Tubes, >>>>>>> this is a special tube with steer

Re: [neonixie-l] 8453/Z550M erratic

2021-02-12 Thread peter bunge
21 at 7:22:25 PM UTC-8 >>>>>>>> bung...@gmail.com wrote: >>>>>>>> >>>>>>>>> I think you are wrong. The literature explains this tube is >>>>>>>>> designed to be driven by 5v logic and it does work. The steering

Re: [neonixie-l] 8453/Z550M erratic

2021-02-12 Thread peter bunge
gt;>>>>>> circuit. >>>>>>>>> [image: 8453 Cct.JPG] >>>>>>>>> >>>>>>>>> On Wed, Feb 10, 2021 at 11:12 PM gregebert >>>>>>>>> wrote: >>>>>>

Re: [neonixie-l] 8453/Z550M erratic

2021-02-12 Thread peter bunge
gt;>>>>>>> cathode line to verify the ripple is not excessive ? Rk and Ck >>>>>>>>>> create an RC >>>>>>>>>> filter around 77Hz, and the line is 50-60Hz, so there could be some >>>>>>>>>> ripple. >

Re: [neonixie-l] 8453/Z550M erratic

2021-02-13 Thread peter bunge
t;>> >>>>>>>>>>>>> On Thu, Feb 11, 2021 at 2:10 AM Dekatron42 < >>>>>>>>>>>>> martin@gmail.com> wrote: >>>>>>>>>>>>> >>>>>>>>>>>>>

Re: [neonixie-l] 8453/Z550M erratic

2021-02-13 Thread peter bunge
rs by the glass where I get >>>>>>>>>>>>>> lots of >>>>>>>>>>>>>> random flashing. >>>>>>>>>>>>>> Remember that the really bad one works perfectly with >>>>>>>>&

[neonixie-l] Dekatron for Demo Display

2021-02-14 Thread peter bunge
Having finished the Amperex 8453 display I started on my Dekatron. Thanks to all for the suggestions. I read up on Ronald Dekker's clock project https://www.dos4ever.com/decatron/decatronweb.html and decided against a direct drive from a 74141 because, even if it was practical, it would not loo

Re: [neonixie-l] Re: Dekatron for Demo Display

2021-02-14 Thread peter bunge
You are absolutely right. 5v was not high enough despite Ronald's and my confirmation that it would work. I am changing to +25v and -25v and will have an optocoupler with the diode driven from the 5v PIC and the transistor at the bottom of the resistor between the two power supplies. It keeps it si

Re: [neonixie-l] Re: Dekatron for Demo Display

2021-02-15 Thread peter bunge
Those values were left over from the 5v circuit. I was more concerned with the level shifting from the PIC at 0 to +5v. Peter On Mon, Feb 15, 2021 at 6:48 PM Jon wrote: > I'd had a similar thought about increasing the bias resistors - it's not > necessary to run so much current (5mA) through tha

Re: [neonixie-l] Re: Dekatron for Demo Display

2021-02-17 Thread peter bunge
I tried my new circuit with the optocouplers using 270k for R5 & R6 and 1k for R3 & R4. It works within the limits of +0v and about -22v. It is interesting that the other circuit did not work for low + bias. It must be the slower positive edge as someone mentioned. I will use about +30 and -30v, wh

Re: [neonixie-l] Re: Dekatron for Demo Display

2021-02-18 Thread peter bunge
I tried another Dekatron but I'm not sure what it is, and it doesn't work. The glow just flickers back and forth on adjacent elements. This tube looks a bit like the GS10C/S but has no markings, has a metal base, and the end is domed instead of flat. It fits the same socket and appears to have guid

Re: [neonixie-l] Re: Dekatron for Demo Display

2021-02-18 Thread peter bunge
transistor version as well. Peter On Thursday, February 18, 2021 at 10:27:29 AM UTC-5 peter bunge wrote: > I tried another Dekatron but I'm not sure what it is, and it doesn't work. > The glow just flickers back and forth on adjacent elements. > This tube looks a bit like the

Re: [neonixie-l] Re: Welcome & please introduce yourself!

2021-03-02 Thread peter bunge
I would be very careful letting your kids play with Nixies. I'm not saying don't let them but find low energy power supplies to run them. You will need 200 volts or more from a switching power supply. Do not use a transformer or line voltages. It would be safer to let them try 7 segment LED displa

Re: [neonixie-l] LM-324 op amp

2021-04-01 Thread peter bunge
Why are you using a 324 Op Amp? Older OpAmps are asking for problems with instability and common mode input range as well as output swing limits. I suggest you look at something like the TLV2371 series that is available as single, dual, and quad. Inputs and outputs are rail to rail. Yes, connect as

Re: [neonixie-l] Way off topic...tachometer circuit..

2021-08-12 Thread peter bunge
It's a charge pump. VR1 fixes the pulse amplitude so the tach is not sensitive to battery voltage. C2 determines the charge per pulse and the meter averages the current because it cannot follow the pulses fast enough. R6 calibrates it. I suggest putting a 'scope on it and follow the pulses from the

Re: [neonixie-l] Corvair instrument panel is lit up

2021-08-14 Thread peter bunge
I built a digital tach for a Corvair many years ago and wrote it up for Radio Electronics. You can see the article here in Radio Electronics Apr 1973 https://worldradiohistory.com/Archive-Radio-Electronics/70s/1973/Radio-Electronics-1973-04.pdf On Sat, Aug 14, 2021 at 7:33 PM David Forbes wrote:

Re: [neonixie-l] Re: Looking for some info about RCA DTF numitrons

2021-10-29 Thread peter bunge
On Oct 28, 2021, at 1:26 PM, peter bunge wrote: > >  > Would anyone care to sell me an end view Numitron (DTF104B) to add to my > vintage digital working display? > I would also like a DIP 7 segment incandescent display, or anything > interesting not in the picture. Nothing to

Re: [neonixie-l] OT request - the grim reaper approaches

2022-03-03 Thread peter bunge
John; hang onto those treasures. Maybe reward a good friend by setting something aside that your son can deliver. Your family may like to keep a few items to remember you. After all this is part of you. I have a friend in long term care who knows his collection of vacuum tubes are safe with his bro

Re: [neonixie-l] Changes to eBay Purchase History

2023-04-21 Thread peter bunge
There is a saying "if it aint broke don't fix it" but unfortunately Ebay has improved things until they are useless - to me anyway, I hardly use it anymore. Windows 11 is also approaching useless and is making paperweights out of computers. I keep going back to Win7 if I want to get work done. On

Re: [neonixie-l] Interesting! (not my listing)

2023-05-12 Thread peter bunge
Except they are not nixie tubes. They are Incandescent 7 segment displays. It says so on the watch "Numitron" On Thu, May 11, 2023 at 10:08 PM martin martin wrote: > > https://www.ebay.com/itm/195748248206?mkcid=16&mkevt=1&mkrid=711-127632-2357-0&ssspo=eo3lWCoqQIe&sssrc=2047675&ssuid=PHyjOWfuSxi

Re: [neonixie-l] Fwd: [tubecollectorsassociation] Tube anachronism in "Oppenheimer"?

2023-07-25 Thread peter bunge
I was very disappointed in the film. It was not historically accurate. The two bombs were of different designs and the reactors were different and built in parallel to hedge their bets. The book "The Life and Times of a Technological Fixer" was more interesting to read than watching the film. My fr

Re: [neonixie-l] Test

2023-09-19 Thread peter bunge
I can see these posts, if that helps. On Tue, Sep 19, 2023 at 1:29 PM chuckrr wrote: > I wonder if this works? My posts have not been showing up for a long > while now. > > -Chuck > > > Original Message > From: "'neonixie-l' via neonixie-l" > Sent: 9/19/2023 11:59:27 AM > To: "neoni