Equal RL value for nixie tube ?

[bianchi77]

Everyone,

I want to make a dumy load equal to Nixie tube, what's RL value equal to it ?
100 K 1/4 will do the job or I need bigger ?

Cheers

[PeteS in CA]

Re: Equal RL value for nixie tube ?

Maybe some one with experience with restoring old equipment can give a better answer - nixie tubes were almost out of use in the mid-70s when I started working in electronics. I'd suggest finding datasheet type info on nixie tubes, learning what current they drew and using Ohm's Law to calculate a dummy-load resistor.

[stj]

Re: Equal RL value for nixie tube ?

http://www.tube-tester.com/sites/nixie/dat_arch.htm

[bianchi77]

Re: Equal RL value for nixie tube ?

https://cdn.badcaps-static.com/pdfs/...1768d11c33.pdf

Cheers stj

[bianchi77]

Re: Equal RL value for nixie tube ?

https://cdn.badcaps-static.com/pdfs/...f330196059.pdf

Does the parameter on page 33 that I need to consider ?
Voltage distribution A and voltage distribution B ?

[Khron]

Re: Equal RL value for nixie tube ?

The best(?) way to go might be to first know / find out what Nixie tubes you're planning on using, THEN finding the datasheet for them, and THEN crunching the numbers.

What's the use in using the data from another tube, which could be wildly different?

PS: That "voltage distribution" thing is for the photomultiplier tubes, which are a very different beast (and for totally other uses) than Nixie tubes.

In the PDF you linked, you need to look at the BOTTOM of pages 32-33.
See the "Type no." colums at the left edge on the bottom of page 32, and the right edge on the bottom of page 33? Quite the coincidence, wouldn't you say?

From what i can tell, for example in the case of the Z303C and Z502s, they draw a current of 300uA / 0.3mA per digit (and you'll only have one lit at any one time, per tube), so there you go.

But all that's irrelevant, if you end up using another model of Nixie tube...

[PeteS in CA]

Re: Equal RL value for nixie tube ?

One other point, once you calculate your resistance and necessary power rating (I'd recommend that the actual power be 75% or less of the resistor's rated power), be sure the rated maximum voltage is higher than the voltage you are using (this rating has to do with the materials and construction of the resistor, not Ohm's Law).

[bianchi77]

Re: Equal RL value for nixie tube ?

The best(?) way to go might be to first know / find out what Nixie tubes you're planning on using, THEN finding the datasheet for them, and THEN crunching the numbers.

What's the use in using the data from another tube, which could be wildly different?

PS: That "voltage distribution" thing is for the photomultiplier tubes, which are a very different beast (and for totally other uses) than Nixie tubes.

In the PDF you linked, you need to look at the BOTTOM of pages 32-33.
See the "Type no." colums at the left edge on the bottom of page 32, and the right edge on the bottom of page 33? Quite the coincidence, wouldn't you say?

From what i can tell, for example in the case of the Z303C and Z502s, they draw a current of 300uA / 0.3mA per digit (and you'll only have one lit at any one time, per tube), so there you go.

But all that's irrelevant, if you end up using another model of Nixie tube...

Ok, thanks for the info....that's small ammount of current but already some power on 220V ...0.066VA
So dummy load is equal to 733K ohm R = V / I , I put V =220 V and I = 0.3 mA

[bianchi77]

Re: Equal RL value for nixie tube ?

that's the one you're talking about ?
I'm not sure I have 733K on my box...probably 680K plus 47K will do the job..

[bianchi77]

Re: Equal RL value for nixie tube ?

I got 196V on 727K RL load and 12V input from 7812 regulator...
will it be enough to turn on nixie ?