On Mon, 14 Dec 2015 12:03:58 GMT, the renowned Jan Panteltje <pNaOnStPeAlMtje@yahoo.com> wrote:>Wanted to test some more things, and looking forward to baking some eggs, and maybe fish, >made a spiral coil, >as many of you suspect it was ever since I was abducted and the aliens .. but that is an other story, >anyways their math goes like this: > I took length of the copper tubing in existing coil, (1 meter ) and as litz wire was way > too expensive, even on ebay, I used 2 heavy gauche wires in parallel of the same length. > ><insert formula here for eartlings ehh earth-links, whatever>. >Anyways, smoke! hey >but the coil did not get hot, where does this smoke come from? >I tested it on the PCB for thermal insulation, as before. >Well picked up the peeseebee, and it was freaking hot, >turned it over: > http://panteltje.com/pub/why_the_unexpected_happened_IMG_5201.JPG > >OK, that explains it, seems copper works too on a spiral coil! >Who would have thought that? >In case you think of soldering that way, not sure the components like it. >it is not very even either. >So, mm BAD burn, all the way through to my glass table, glass still OK: > http://panteltje.com/pub/burn_trough_to_glass_table_IMG_5206.JPG >After setting the exhaust fan to maximum, and it still smells, and mind you this happens in just a second! these kind of things, > >testing without the PCB, and with a steel spoon if it would burn water: >The alien calculations worked: > https://www.youtube.com/watch?v=lKIaj77ZWws&feature=youtu.be > > http://panteltje.com/pub/boiling_water_test_setup_IMG_5203.JPG > >I bet you could charge your iPhone in seconds with that.. --sp -- Best regards, Spehro Pefhany Amazon link for AoE 3rd Edition: http://tinyurl.com/ntrpwu8 Microchip link for 2015 Masters in Phoenix: http://tinyurl.com/l7g2k48
Steel melter for forty bucks? Needs a KW dc supply. Also $1 100nS 30KV! Also ALSO!
Started by ●November 21, 2015
Reply by ●December 15, 20152015-12-15
Reply by ●December 15, 20152015-12-15
On Fri, 11 Dec 2015 14:18:45 -0800 (PST), sroberts6328@gmail.com wrote:>Generally the first time you mill or cut a graphite block at home is the last. > >Nasty fine black dust everywhere, and it dulls saw blades.A little off the topic, but if it dulls saw blades, wont it also wear out the tumblers in locks? Yet graphite is sold for lubricating locks.
Reply by ●December 15, 20152015-12-15
On Tue, 15 Dec 2015 03:06:36 -0600, boomer#6877250@none.com wrote:>On Fri, 11 Dec 2015 14:18:45 -0800 (PST), sroberts6328@gmail.com wrote: > >>Generally the first time you mill or cut a graphite block at home is the last. >> >>Nasty fine black dust everywhere, and it dulls saw blades. > >A little off the topic, but if it dulls saw blades, wont it also wear >out the tumblers in locks? Yet graphite is sold for lubricating locks.I would guess that the space between the lock parts is much larger than the graphite particles and that the graphite rolls on top. It might polish the moving parts, which would be a good thing.
Reply by ●January 19, 20162016-01-19
George Herold <gherold@teachspin.com> wrote:> On Wednesday, December 2, 2015 at 2:18:26 PM UTC-5, Cydrome Leader wrote: >> Cydrome Leader <presence@mungepanix.com> wrote: >> > Cydrome Leader <presence@mungepanix.com> wrote: >> >> sroberts6328@gmail.com wrote: >> >>> Might want to check, the original designer of that was retailing them west of 80$. >> >>> I was holding off at 80, but was watching it. Never know these days when a product is a clone of a clone. >> >> >> >> Just ordered one for $38.something. While the board does look real simple, >> >> I think the exploding your own parts to get it right would exceed the >> >> price of the ebay one. >> > >> > Wow, it arrived already- 8 days after order. China to Chicago is faster >> > than free shipping from Amazon. Obviously the thing went airmail. >> >> Well, it works. >> >> The heatsinks were busted off the board as the solder down stakes broke >> free, at the PCB, can be reflowed with no problem or damage past that. >> >> The think resonates at 100kHz with 12 volts in and no load. I was able to >> heat up drill bits, coins and other junk with no problems. Frequency >> drifted upto 160kHz with some materials. >> >> With no load, the copper tube does heat up quite a bit, the caps stay cool >> and part number checks show they are in fact PP induction cooktop caps. >> >> Will play some more with a scope and larger power supply and maybe water >> or air cooling for the coil. With so few turns winding up some litz wire >> would be pretty easy too. >> >> The board is dead simple. If I saw it at hamfest, I'd have haggled to $20 >> or $25 tops, but whatever. It's fun so far. > > Hey Cydrome, what did you use as a power supply, (and how much current?) > My son has been trying to heat treat metal (knifes) with a blow torch and I > think he needs hotter.I was using a 12 volt 6 or 7 amp linear power supply. It's way too small for the job and was going into current foldback mode. Got sidetracked with other junk as usual. Will try a 24 volt 12 amp power supply next to get a feel for how fast that copper tube overheats. It does heat up way more with no load than with a load.
