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.

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.  

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.

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

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

 

On a sunny day (Sun, 13 Dec 2015 23:23:43 -0800 (PST)) it happened Bill Beaty
<billb@eskimo.com> wrote in
<1103e17a-74ec-46b1-987d-57e94f6cf5ee@googlegroups.com>:

>On Sunday, December 13, 2015 at 11:06:21 AM UTC-8, Jan Panteltje wrote:
>> While looking for things to melt I came across my Thorium welding rod collection.
>> These are a bit [radio] active on the Geiger counter.
>
>Probably tungsten TIG rods, with ?1% thorium.   Not very hot when 
>compared to the powder from burned lantern mantels.
>
>Once I had someone try to cut a TIG thorium rod with an oxy torch, 
>thinking to avoid radioactive grindings.  Uh, no.  SUDDEN BIG YELLOW 
>CLOUD of tungsten oxide smoke.   Mmmm, smells like alpha particles.
>
>Actually we dropped everything, rolled up all the big overhead doors 
>while fleeing outside.
>
>Practiced habit: breathing outward continuously while fleeing.  Only 
>take a breath far upwind, to check whether you're out of the plume.
>Learned during the bygone age of big opaque clouds of bus engine 
>exhaust, also fireworks, also cooking experiments involving dry chili 
>peppers in overheated wok oil (an invisible tear-gas.)

Yes I use that technique when soldering, the fumes seem to come after me sometimes... [1]
Anyways, thanks for the warning, will leave those rods alone for a while.
The big copper coil is by now somewhat colored copper getting darker.
MOSFETs stay very cool, body temperature or less.
Quite satisfied with this thing.

[1] especially when burning insulation of transformer wire, I have read these fumes are poisonous.
Those people who use thin transformer wire for prototyping use that, I do not want that.

On Sunday, December 13, 2015 at 11:06:21 AM UTC-8, Jan Panteltje wrote:
> While looking for things to melt I came across my Thorium welding rod collection.
> These are a bit [radio] active on the Geiger counter.

Probably tungsten TIG rods, with ?1% thorium.   Not very hot when 
compared to the powder from burned lantern mantels.

Once I had someone try to cut a TIG thorium rod with an oxy torch, 
thinking to avoid radioactive grindings.  Uh, no.  SUDDEN BIG YELLOW 
CLOUD of tungsten oxide smoke.   Mmmm, smells like alpha particles.

Actually we dropped everything, rolled up all the big overhead doors 
while fleeing outside.

Practiced habit: breathing outward continuously while fleeing.  Only 
take a breath far upwind, to check whether you're out of the plume.
Learned during the bygone age of big opaque clouds of bus engine 
exhaust, also fireworks, also cooking experiments involving dry chili 
peppers in overheated wok oil (an invisible tear-gas.)

While looking for things to melt I came across my Thorium welding rod collection.
These are a bit [radio] active on the Geiger counter.

One question that came up is: Will decay rate change in a RF (heating) field?

So to see if I could measure this easily (without high power RF messing up my Geiger counter)
I uses a Zns scintillation screen
 
  to try to see if there were any flashes from those rods.
Unfortunately after spending half an hour in the near dark bathroom I did not see any flashes...

Should be alpha, say Helium ions...

Thorium welding rods, Thorium lamp mantles, you know,

But: Tests: Thorium welding rods do not heat up in the coil...
And heating them up still does not show any light flashes on the screen.

Should try that Geiger counter again.

And that, was only part of all alien Xperiments today.


I have also recorded some movies that I did not have time to watch, RED [2] one of them, it stands for ...
Maybe I should watch it,.
Maybe 


mm
Suggestions?
OK, no forget it.
;-)

Can guess

On 14/12/15 06:06, Jan Panteltje wrote:
> While looking for things to melt I came across my Thorium welding rod collection.
> These are a bit [radio] active on the Geiger counter.
>
> One question that came up is: Will decay rate change in a RF (heating) field?

Heating should not affect the nucleus until you pass millions of degrees.

I doubt that your RF has a wavelength short enough to interact with the 
nucleus either!

Clifford Heath.

> So to see if I could measure this easily (without high power RF messing up my Geiger counter)
> I uses a Zns scintillation screen
>
>    to try to see if there were any flashes from those rods.
> Unfortunately after spending half an hour in the near dark bathroom I did not see any flashes...
>
> Should be alpha, say Helium ions...
>
> Thorium welding rods, Thorium lamp mantles, you know,
>
> But: Tests: Thorium welding rods do not heat up in the coil...
> And heating them up still does not show any light flashes on the screen.
>
> Should try that Geiger counter again.
>
> And that, was only part of all alien Xperiments today.
>
>
> I have also recorded some movies that I did not have time to watch, RED [2] one of them, it stands for ...
> Maybe I should watch it,.
> Maybe
>
>
> mm
> Suggestions?
> OK, no forget it.
> ;-)
>
> Can guess
>

On a sunny day (Fri, 11 Dec 2015 14:18:45 -0800 (PST)) it happened
sroberts6328@gmail.com wrote in
<c8adceb0-04ae-468c-b727-0832caaf17d8@googlegroups.com>:

>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.
>
>I do lathe down graphite welding/cutting  rods to make small crucibles, but I would seriously rather buy them. 
>
>SWMBO will scold you and give you two supervised weeks of being Dr. Bunsen HoneyDo, if she ever saw what happens when you dry
>machine graphite without it being wet or near a serious collection system. 
>
>Steve 

Yea, for 2$39 inclusive shipping of course:
 http://www.ebay.com/itm/321849233116

And then you can melt even hotter things, like maybe GOLD?