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Old 12-05-2008, 03:36 PM #353
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

Only 4 amps? That sounds real nice, Mike! Then I might be able to play around with my first 9,7A PowerSupply (should be here soon) before I get the second one that I intend to parallell. Let's just hope there is enough current to actually ionize the gas.

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Old 12-06-2008, 02:45 AM #354
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

Hey Mike never did hear from Chris on the pwms that tottish made dont need it anyway... I didnt receive my power Transistor today so it wont be here till Monday like the sales person told me hope things are going well Lynn
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Old 12-06-2008, 03:15 AM #355
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

Lynn --
I'm machining the parts to mount my tube in a 2" PVC pipe -- Getting near done. *Good luck on the transistor.

Also, it sometimes has to be pushed to 6 or 7 amps to start. *After that, mine starts and runs at ~ 4 amps minimum. *Remember my comments above about low power *and my fix for that.

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Old 12-06-2008, 03:51 AM #356
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

yes larger capisitor and lot of ferrit and dont go to low on power somthin like that... good luck with the pvc sounds cool got to see pics
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Old 12-06-2008, 04:24 AM #357
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

It's in the pipe and works but all there is to see now is a pipe with coax coming out. I used a 20" piece and machined mounts to fit the inside curve. Now to mount the PS underneath --- then the cells......

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Old 12-06-2008, 05:14 AM #358
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

Sounds Good Mike, I was just ordering some peltiers, I broke the one I had trying to get that aluminum plate off, gona get a real thin piece of copper and paint it black
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Old 12-06-2008, 05:21 AM #359
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

The scientech sensors have one side of the TEC "glued" to the mass heat sink. The other ceramic side is ceramic coated with a "special" high temp flat black coating. No copper stuff. I can wipe the burned coating off with solvent and spray more stuff on it.

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Old 12-06-2008, 05:27 AM #360
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

Ok I understand completly I think you tried to tell me that before. the ceramic is strong enough gothcha thanks
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Old 12-06-2008, 08:10 PM #361
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

UPDATE! i got the PWM's from tottish, the cost of these units are $22.50 delivered to anyone who needs them.
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Old 12-07-2008, 01:53 AM #362
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

Hey Mike, any pics yet?
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Old 12-07-2008, 04:05 AM #363
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

NS -- What's there to show but a pipe ??? I'm designing the driver housing which will be attached under the pipe.

Not much to see .

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Old 12-07-2008, 04:19 AM #364
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

but its a nice looking pipe
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Old 12-07-2008, 04:36 AM #365
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

I will have to machine the fins on the heatsink to comnform with the pipe so the power supply isn't too deep. I also have to build the battery holders for 8x 18650 cells to mount on both sides.

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Old 12-08-2008, 03:15 AM #366
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

Chris ---

What's the problem with the 2 Watt tubes? Low on gas? Can they be re-gassed?? Might be fun to try.

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Old 12-08-2008, 03:56 AM #367
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

where would you send them for re gassing
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Old 12-08-2008, 04:17 AM #368
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Default Re: OUTRIGHT BUY! 15W RF EXCITED CO2 BURNING LASER

I just happen to have a tank of "Crazy Mike's CO2 gas mix" *I made it years ago with He, N2 and CO2. * *It might still work !!

Mike

I think that a few of us have gone beyond the GB here. I'm opening a thread in the "other color" forum here for discussion of operation and fixes.
Chris still has stuff to sell and we just clutter it for him.
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