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Author: Subject: Suggestions of getting a lab heating source
G-Coupled
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[*] posted on 29-11-2019 at 08:52


Quote: Originally posted by vibbzlab  
I did post it here. :D

I think you are so into bexco mantle. Ye just 2-3 mantles did spark. XD


For USD160 for a 5L stirrer/mantle down to USD60 for a 500ml one, yes - I am (or hopefully will be) so into them.

If they're just OK as is, or can be easily tweaked to work safely and well, then at these prices, IMO they could be nothing short of revolutionary for affordable home chemistry. :cool:
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vibbzlab
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[*] posted on 29-11-2019 at 09:14


If that mantle has a stirrer I would have definitely bought it.




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draculic acid69
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[*] posted on 29-11-2019 at 18:59


Again is that bexco mantle regulated with a Variac in that boxy part where the dial is?why is there a rectangle attached to the mantle when a circuit board will do.
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vibbzlab
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[*] posted on 29-11-2019 at 19:27


That's just hollow . It has nothing in it. Waste of space




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Sulaiman
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[*] posted on 29-11-2019 at 19:32


I do not know, but I suspect that there is a simple bi-metalic switch mechanism in that box,
the size of the box may be arbitray, or to insulate the switch from the heat of the mantle,
at those prices an inbuilt variac is very unlikely.

The good news is that you have plenty of space to replace the (presumed) bi-metalic controller with a cheap eBay triac based 'dimmer' module.
(I really like those modules - fine control of constant power)
The only difficult part for a non experienced electrician may be a little re-wiring.




CAUTION : Hobby Chemist, not Professional or even Amateur
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vibbzlab
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[*] posted on 29-11-2019 at 19:44


Take care not to die of electrocution. That stuff is really dangerous




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RogueRose
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[*] posted on 30-11-2019 at 04:18


Quote: Originally posted by j_sum1  
Noisy but good.



IDK if you have ever tried something like a router speed control or a dimmer but I think those should work well for a heat gun as it's a normal resistive load - nichrome. The controllers are basically triac controllers and I know most can do 1500w or more. I use mine on a vacuum cleaner (universal motor - brushed AC) and it works great at controlling how much suction or "blowing" (lol) I get and it the motor doesn't seem to mind even hours on end.

I know the 2000w triac "motor controllers" on ebay ($4-10) also list uses as heater controller, which is also a plain resistive load. I'm guessing that is what is in my more expensive "Master Appliance" heat gun (750w only) and it has a little triac control for only the element, so it should be good.
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vibbzlab
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[*] posted on 30-11-2019 at 16:07


What do you guys think on butane torch




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G-Coupled
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[*] posted on 30-11-2019 at 16:19


Clean when hot and blue - IDK about how clean they are running cooler with a more yellow flame. Open flame, though.

If open flames don't bother you, then a lot of early experimenters used little Methanol burners that worked well enough. Should be cheap as chips to buy and to run.
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vibbzlab
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[*] posted on 1-12-2019 at 00:00


I do use Alcohol burner now




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