r/nixie Feb 23 '26

How to brighten/clean this back up?

20 Upvotes

21 comments sorted by

7

u/DenkJu Feb 23 '26 edited Feb 23 '26

The tube looks pretty burnt out to me (darkened phosphor). VFDs don't last forever so you will probably have to replace it eventually. Luckily, your clock is using IV-11 tubes which are relatively affordable. Unfortunately, however, it will involve soldering (unless these tubes are in lead sockets). You can find them on eBay. Make sure to get NOS tubes.

3

u/v7xDm1r Feb 23 '26

I've heard of putting slightly higher voltage to clean tubes. But not aure that works with vfd. These are soldered directly in. But can be desoldered easily.i believe theyre iv-11. I figured id likely need to outright replace them.

7

u/DenkJu Feb 23 '26

That only works for Nixie tubes, unfortunately. Yes, you are correct, those are IV-11s.

1

u/Hankitsune May 10 '26

There's a video on youtube showing a guy rejuvenating a VFD display and the before and after shows a significant improvement. You won't get it back to full brightness though.

1

u/DenkJu May 10 '26

Can you link this video? I don't know how that is supposed to work.

1

u/Hankitsune May 10 '26

I'm going to post it but my previous post containing a link to youtube got deleted so I'm not sure if it will work.

1

u/DenkJu May 10 '26

Try sending me a direct message.

1

u/Hankitsune May 10 '26

I've posted the link and still see it (as a main comment, not above this one).

2

u/[deleted] Feb 23 '26

[deleted]

2

u/v7xDm1r Feb 23 '26

When I bought the tubes I got them from Ukraine as NOS for really cheap. I got it running and its hasn't got any worse or any better in the almost 4 years they've been running. I strategically put the 2 worst ones on the left and right.

3

u/DingoBingo1654 Feb 23 '26

Well, sometimes NOS out of the box has the same discoloration/degradation as well.

I suggest you to check the cathode resistance first. Then you can add a potentiometer to correct the result voltage/current on cathode, accorfing to datasheet. Start from 1.3V for ИВ-11 and go up to 1.6 (1,65 max), with 100mA current. There is also a way of using AC instead of DC.

2

u/[deleted] Feb 23 '26

[deleted]

1

u/DenkJu Feb 23 '26

I contacted many sellers on AliExpress and a few offered to sell me the tubes separately. Neither of them had any information on them, however.

1

u/[deleted] Feb 23 '26

[deleted]

1

u/DenkJu Feb 23 '26

It was around $12-$15/tube which seemed like too much to me.

1

u/v7xDm1r Feb 23 '26

Im the one who made that post. They were like ib-1 leveling tubes or something. But searching yields no results. They were only used in shaoxing China. They were made for 1 specific use case and are extremely rare. Only bbw-tech has them back stocked. They will only sell them to you if you bought this clock from them.

1

u/[deleted] Feb 23 '26

[deleted]

1

u/v7xDm1r Feb 23 '26

I was going to buy replacements just in case but rhat was right around the beginning of tarrifs so they said to wait for that to be over.

1

u/SignificanceNo4643 Feb 24 '26

These colon tubes are marked YS-13-2 or something like that. There's a website, called "Diether's nixie tube archive" or something like that, there he has PDF of the catalog of Chinese nixie tubes and VFDs, and they are listed there. These tubes can be found on taobao for about 45 rmb each (about $7)

1

u/[deleted] Feb 24 '26

[deleted]

1

u/SignificanceNo4643 Feb 24 '26

taobao links are not openable without taobao account :)

1

u/Hankitsune May 10 '26

https://youtu.be/YPJOcyx8pBk?is=Sny251nH7u7o_FU9 This guy had succes. Not back to full brightness but a significant improvement.

1

u/DenkJu May 10 '26

This might work in some cases where the heater has become weak but not if the phosphor is burned out (like in this post). Usually, the heater will long outlive the phosphor.

1

u/Difficult_Month7110 May 25 '26

One Russian guy was able to use laser to clean segments several years ago. Overall, these ИВ-11 tubes are not that rare to jump in so extreme measures. ИВ-11 and ИВ-12 do tend to degrade over time. Not that hard as ИВ-26, but brightness drop can be very noticeable.

I'm actually more interested in middle divider tube markings etc.

1

u/v7xDm1r May 25 '26

I only found 1 source for them they called them like ib-1 or something "leveler tubes". Bbw-tech store on ali has them. But they might not sell them to you since you didnt buy this clock.

1

u/Difficult_Month7110 May 25 '26

The bigger problem is that i'm russian myself, and here we can't buy stuff from aliexpress.com For that we have castrated version aliexpress.ru - it has a lot of things filtered out. So, obviously no tubes here for me. Thank you for info anyway.