Source for quantum tunneling composite?

archer6817j

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Hi, no results when I search Maplins. Do you have a link? I contacted a manufacturer but I'm not sure they will be into my request for prototype quantities. I was hoping to find a retailer.

Also, a google search yields a lot of research papers and one manufacturer (the one I contacted) but no retail links. Let me know if you have a secret :)
 

archer6817j

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Great thanks! Since you bought some, would you say the size it suited to flashlight use? It seems pretty thin so I was just wondering what your experience has been like thus far.
 

MWClint

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they are pretty small, but each one can handle up to 10amps. also being so small, they dont take up much space in the body.
 

archer6817j

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You might be able to use it for that if it was a "plunger" as opposed to twisty. I'm just guessing it would be hard to hit the threshold accurately with a twisty.

I'm planning to use it as a dimmer in an unregulated light. Supposed to carry 10 amps...which sounds doubtful but potentially exciting!
 

nbp

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Would someone want to to order a bunch and split 'em up? I don't want 70, maybe 4 or 5 only. Heck if you sold them off for $0.50 each you'd make some money off it, and I'd take a couple. Anyone?
 

archer6817j

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Just an FYI: I contacted Peratech (they make QTC) and their answers to my inquiries were no, no, and no. Also, QTC is patented by them and "not available anywhere" for retail sale. So, I don't know what is being sold on the net or how long it will be available. However, Peratech will be happy to sell you a technology license for 120k :) don't forget to tack on engineering and manufacturing.

I do know that other conductive foams exist, so maybe the little squares we can buy are not actually QTC?
 

Anglepoise

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Apparently this material does not like being subject to side loads when used with a twisty. I think we machinists will have to come up with a very thin device that does not turn or twist when pressure is being applied. Not difficult but the thinner the better.
 

smarkum

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Hello all, I received some QTC yesterday. It was surprising to me as I thought it wasn't in stock and wasn't coming! So, I'm thinking that I will send a couple of pieces to archer and to beamhead and then they can test it and give the details as they see fit. I don't want to be sending out crappy stuff to people. And, other than to stick it in a few of my lights, I don't know how to test it. So, after we hear from them re: the quality of this stuff, I will be open to sending it out to more! I think there are 100 pieces. . .

I hope it is good stuff. I'm going to play with it later today myself!
 
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