I have run into a few tubes like this.

 

I was lucky enough to have been able to dislodge them.

 

I believe you’re right in that it must have been in shipping as the seller of 
one of them actually took a video of the tube working and had lit each segment 
prior to shipping.

 

Similar to Pete’s and Kevin’s solution, I smacked the tubes against my sons 
hard cover math book (instead of wood).  I remember the first tube being very 
easy on the first hit.  The last tube was so hard that I remember giving in and 
thinking…. If I break it I break it. It eventually sprung loose as well. 

 

Michail Wilson

206-920-6312

 

From: [email protected] [mailto:[email protected]] On 
Behalf Of petehand
Sent: Sunday, December 30, 2018 12:02 AM
To: neonixie-l
Subject: [neonixie-l] Re: B7971 "Repair"

 

I have. I had a similar problem and cured it by rapping the tube face down, 
hard, on a wooden board. The crossed segments sprung apart. I figured it must 
have been mechanical shock that crossed them to begin with so another shock 
might separate them. I'm not recommending it, just saying it worked for me. Of 
course there's a chance of breaking the tube, but you can't use it the way it 
is anyway. Strike it square so that a large surface area hits and you don't get 
stress concentrated on a small area.

On Saturday, December 29, 2018 at 11:26:16 PM UTC-8, Jeff Walton wrote:

Has anyone successfully "repaired" a B7971 where there is a mechanical short 
between two segments? 

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