Re: [TCML] Burn Through The Stem Of The Globe?

[Sfxneon@xxxxxxx]

I can confirm this too. I have an old Strattman Design 12" globe that I  
refilled with pure xenon. I ran it continually from the smaller flyback power  
supply from Amazing1 (Information Unlimited) and after a few weeks, the flyback  
burned up. (The smaller Information Unlimited power supply operates from 12  
volts DC.)
I thought it was the flyback's fault, until I saw a crack in the  top of the 
stem. It looks like the discharge must have concentrated in one spot  on the 
ball end of the stem, and the intense localized heat caused it to crack,  and 
not actually burn through. I'm sure now that the globe went first, causing  the 
flyback to fail later. 
 
Tony Greer
 

In a message dated 1/18/2009 9:05:34 A.M. Central Standard Time,  
sdbogard@xxxxxxxxx writes:
Another thing to remember Miles, is that the  globes Mark used were
old, and they just don't make stuff like they used too;  it is highly
probable that the glass is substantially thicker on Marks  globes.  I
have heard of many MOSFET driven globes dying, especially  when driven
by the power supplies for sale at Amazing1, but then again from  what I
know of those drivers they run off of Rectified 120V, but I don't  know
that for sure from looking at pictures (I suspect this because I  saw
no step down transformer in the works, and the thing had an AC  wall
plug.)  If my globe draws 2 amps at 12 V, that could mean 20 A  at
120V, or 2400W at full power (which is an absurd value, so I'm  sure
there are means to prevent this.)  Just my two cents, I'm no  expert.

Scott Bogard.
 
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