Limitation resistance on IN-4

[Benoit Tourret]

Hello Everybody, what resistor would you add to the IN-4 tubes on a  Classic Rev6 Clock   board from  nixieclock.biz ?

I put one 6.8K per tube on the anodes, but the tubes are a bit weak, 

Any idea ?

Regards,

Benoit.

[Blitzen]

What is your voltage set at? 6.8K would be an appropriate resistance for these tubes at 180vdc in direct-drive mode, which that clock kit is not; it's a 1x6 multiplex. Multiplexing usually yields a less-bright display. There is some debate as to whether or not you should use lower resistance to make them brighter. 
Since that kit gives you the option to raise the voltage, I would try that first.

[Benoit Tourret]

I am at the maximum allowed by the software: 200V

I can mesure between 195 and 198V.

At the max brightness, I am less bright than another IV-4 clock I have. (Sputnik clock, 1 x 4 Mutiplexed + 1 OG-4)

If I enable the LDR, under 250 some digits doesn't light, (usually the 0 witch is more difficult to lit than the 1 with a low voltage).

with a minimum of 300, the 0 are sometimes flickering, 

I even put a complete new set of 6 bulbs, never used.

[Benoit Tourret]

755 / 5 000

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I made some new tests. I mounted 6 IN-12 tubes on the clock board. I noticed that there were 3K resistors on board. So I plugged my tubes directly into the board without adding any resistance. It worked directly at 170V. The problem comes from the tubes or their wiring. I'm reassured, I can still hold a soldering iron. On the other hand, concerning the pinout of the IN-4 tubes, I read everything and its opposite. between the biquinary mode, the even/odd anodes and the anodes marked A1, A2 and A3, I am lost. I have 1, 2, 3, 5, 6, 8, 9, 11, 12 and 14 for the cathodes wired in parallel and 13 for the anode. but the numbers 0 and 2 are very difficult to light. How to connect these tubes ??? should I connect the 4, 7 and 10 to the 13 ??

Regards,

Benoit.

[Michail Wilson]

Just tie the anodes together

Sent from Space

On Jun 26, 2023, at 2:22 PM, Benoit Tourret <benoit....@gmail.com> wrote:



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[Michail Wilson]

Here is a picture of a clock I wanted to do with sockets.  If you look closely, you have see commons tied together from stock Russian wiring.  

Sent from Space

On Jun 26, 2023, at 2:22 PM, Benoit Tourret <benoit....@gmail.com> wrote:



755 / 5 000

[Benoit Tourret]

Hello  Michail,

I tested  4, 7 and 13 connected together as anode, it works fine.

I don't need to rise the voltage, 180V is just perfect. I'll see in a couple of days if the 3k resistors are OK or if I must ajust it.

Thanks a lot !!!

[Michail Wilson]

Welcome.  :)

Sent from Space

On Jun 27, 2023, at 5:06 AM, Benoit Tourret <benoit....@gmail.com> wrote:

Hello  Michail,

To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/d432fdb8-ae24-4cba-8476-232dc281ca0en%40googlegroups.com.

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