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We run an RT in one of our shows, and while I don't deal with it on a
daily basis, we haven't seen this effect.

Are the jets or holes in the tube very fine.. perhaps as the tube is
heating up ??
try running some ice over it between sessions to see if it comes back to
life.

Stuart Kohlhagen
Manager Research and Development
Questacon
The National Science and Technology Centre Canberra Australia 

-----Original Message-----
From: Informal Science Education Network
[mailto:[log in to unmask]] On Behalf Of William Katzman
Sent: Friday, 6 November 2009 12:55 PM
To: [log in to unmask]
Subject: Re: Ruben's Tube Dies Down-Ideas?

ISEN-ASTC-L is a service of the Association of Science-Technology
Centers Incorporated, a worldwide network of science museums and related
institutions.
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*****

How is the gas fed into the Ruben' tube?  Is it a local tank or a
distantly fed gas tank?
If it's distantly fed, then I would think your delivery system is
under-sized.

-William

On Nov 5, 2009, at 5:13 PM, Holly Csiga wrote:

> ISEN-ASTC-L is a service of the Association of Science-Technology 
> Centers Incorporated, a worldwide network of science museums and 
> related institutions.
> **********************************************************************
> *******
>
> Hello ISEN folks!
>
>
>
> My colleague Matt has been working on improving the function of our 
> Ruben's Tube.  If you operate an RT, or know what may cause the result

> that is his description below, we'd love any suggestions or ideas as 
> we finish it up for our sound demonstration.  Many Thanks! -Holly
>
>
>
> Holly S. Csiga
>
> Presentation Specialist
>
> Pacific Science Center
>
> (206) 443-3658
>
>
>
> After I play a song on the keyboard through the Ruben's Tube (3-4
> minutes) I will play a pre-recorded song through the tube also.  Any 
> song. When I get about a minute into the song, I start to notice the 
> fire dying down and parts of the tube will go out completely. This 
> will continue until I get small nibs of flame coming out. My guess is 
> that the tube has become unpressurized and has a problem pumping out 
> flame.
> Has this happened to any of you?
>
>
>
> If this is the case, if it easily becomes unpressurized, I worry about

> pumping too much sound through the RT. Maybe it just can't handle 
> having the keyboard played through it followed by a pre-recorded song.
> I can play a song in my show, but it has to be just one or the other.

> It doesn't seem to handle both back-to back.
>
>
>
> What have been your successes with playing just songs? Have you been 
> able to get through a whole one or a couple of them?
>
>
>
> Please tell me what you can.  I would love it if different people send

> their thoughts about this so that we could get a variety of possible 
> ideas.
>
>
>
> Thanks!
>
>
>
> Matthew Steiner
>
> Science-Interpretation/Presentations Operations Lead
>
> Pacific Science Center
>
>
>
>
>
> Pacific Science Center is an independent, not-for-profit educational 
> institution that inspires lifelong interest in science, math and 
> technology.
>
> Discover Pacific Science Center
>
>
>
>
>
>
>
>
> **********************************************************************
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William Katzman
Program Leader
LIGO Science Education Center
[log in to unmask]
(225) 686-3134

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