Steel melter for forty bucks? Needs a KW dc supply. Also $1 100nS 30KV! Also ALSO!

amdx <nojunk@knology.net> wrote:
> On 12/1/2015 2:32 PM, Cydrome Leader wrote:
>> amdx <nojunk@knology.net> wrote:
>>> On 11/24/2015 6:25 AM, Jan Panteltje wrote:
>>>
>>>>
>>>> I came across this video:
>>>>    https://www.youtube.com/watch?v=LWO93G-zLZ0
>>>
>>> RE; sonoluminescence
>>>
>>> Back about 15 years ago I worked at a company building High power High
>>> frequency ultrasonic amps and transducers.
>>>
>>> Our basic unit had a 2" piezo ceramic transducer and was driven at
>>> 660kHz with up to 1000 watts.
>>>
>>> We could set it in a 20" aquarium filled with water. Dark adjust our
>>> eyes and when powered up, we could see a 2" sonoluminescent beam from
>>> the transducer hit the glass 20" away the reflect back to the other side
>>> of the aquarium.
>>> We had the transducer at a slight angle so it would reflect off the wall
>>> at an angle.
>>>
>>>    This was multibubble luminescence, This was supposed to be the
>>> advantage of our high frequency system, the thousands and thousands of
>>> bubble collapses were able to enhance the *reaction.
>>>   When we used a focused reflector, you could see a white fuzzy area in
>>> the foci and hear a hiss from the ball of cavitation.
>>>
>>> * I guess we never found the proper reaction to enhance, as the company
>>> is no longer in business. :-) I miss it.
>>>   Our claim to fame was selling a 4000 watt unit to CalTech.
>>> It had a 1 gallon flow through vessel with four--4 inch x 4 inch
>>> transducers.
>>>
>>>                                                Mikek
>>
>> Any good ultrasonic "burn" type accidents or injuries? As I've mentioned a
>> bunch of times before, don't just grab even a dollar store transducer
>> powered by a wall transformer out of water.
>>
> 
>  I don't have any, but have heard stories about customers at tech shows 
> sticking their hand in the aquarium while our transducer was powered.
> They weren't very happy.
>                           Mikek

Ha!

I got burned playing with an oxyhydrogen soldering torch at a trade show. 
The flame was so small and cute it looked harmless. Wrong.

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.

On Monday, November 23, 2015 at 12:04:29 AM UTC-8, Jan Panteltje wrote:
> I do not think there is enough conduction in those marbles (or any other Uranium glass) to get it to melt
> in that thing.
> But it would be different with Uranium ore.

Glass will melt in a microwave oven.   So, probably an induction heater works 
too.   However, it won't start from cold.

I heard about accidental glass-melting in home microwave ovens.  So I tracked 
this down and duplicated the effect.   It requires a "trigger," either a 
small particle of carbon etc. which heats up a tiny spot.   Or, just use
a torch to get it started.  See:
https://www.youtube.com/watch?v=cskB5c0mJ58

Glass is an electrolytic conductor, and must be pre-heated to just below 
visible red glow.  This frees up the ions, so any current-loops induced by 
high voltage will begin to couple some watts into the glass.  At a certain 
temperature, the induction heater might offset the natural radiant cooling, 
so the temperature then rises exponentially until the conductive glass 
pool is absorbing a large portion of the magnetron output.

Also, red "lava rock" from under bushes, it will melt into black lava if 
torch-heated and then microwaved.   Put it atop a tiny inverted ceramic 
flower pot.

In the microwave oven, martini glasses with gold-plated rims will self-start. 
Apparently the metal creates a large enough hot-spot that small patches of
ionic conductivity take off and spread.

-wbeaty

On Monday, November 23, 2015 at 11:26:56 AM UTC-8, Jan Panteltje wrote:


 
> So what would happen if you put one of these in that coil:
>   http://www.ebay.com/itm/301321475127
> ?

Hah!  Might work, but also might need a cooling jacket.  Turn down the DC 
supply voltage.  Also, might need a tesla coil "vacuum tester" to ignite 
the tube.  Better: wind a copper-tube coupling-coil around the induction 
coil, then connect the ends to the CO2 tube's existing terminals.  But, 
will AC high-freq give same effects as DC which the tube expects?

On Wednesday, November 25, 2015 at 5:09:46 AM UTC-8, Jan Panteltje wrote:

> After long thought I think the problem is that my mama raised me drinking from vaseline glass.
> At later age I found a locked box in the attic full of that yellow green glass,
> it gave me a funny feeling when I touched it (little idea what radiation was)
> 
> It explains my early enlightenment and my hunger for ever more radiation.
> And supperior IQ of course.


I noticed that during airplane trips, always my creativity would peak about 
20min into the flight, then slowly decrease.  I always carry a blank book to 
record the resulting spew of ideas.   (Do others know about this?  It was 
the origin of mechanical maglev demo, the high speed copper pipes machine.)

Years later I heard an archeology lecture: Apache tribal shamen would mark 
certain caves with a special glyph symbol, and those "secret holy caves" 
turned out to be always radioactive.   A pre-Columbian radiation symbol. 
Radon sources.  Supposedly they convert meditation into visionary experience.

So, do cosmic rays cause altered mental states?  Nikola Tesla said yes, after 
sticking his head in the beam many hundreds of times.  (That explains so 
much!)

As the aircraft rises, the local cosmic ray flux goes to a peak.  5mi altitude 
has very significant ionizing radiation (your geiger counter will roar, fifty 
counts per second for a small GM tube.)

I have some orange radioactive dinner plates.   But I haven't tried attaching 
them to my head like headphones.   Maybe we need muons and far gammas, not 
just yellow uranium compounds.   I will stay with cross-country plane trips 
for my periodic whole-head gamma dose.

On Tuesday, December 1, 2015 at 12:32:52 PM UTC-8, Cydrome Leader wrote:
> Any good ultrasonic "burn" type accidents or injuries? As I've mentioned a 
> bunch of times before, don't just grab even a dollar store transducer 
> powered by a wall transformer out of water.
> 
> Not only was it painful, it was sone of those weird types of pain that is 
> just weird enough to feel even worse. Small RF burns can be like that- it 
> can feel hot but there's nothing hot there etc.

The ultrasound beam passes right through tissues, and probably creates a 
serious hotspot on bone surfaces.   Yeesh.   Also, burns in 3D cannot be 
rapidly cooled like skin surface burns.  The "cooking" may last for many 
seconds, unstoppable.

"I pray nightly that I never suffer an internal burn." - Nikola Tesla

On Monday, November 23, 2015 at 1:31:20 AM UTC-8, Jasen Betts wrote:

> http://www.aliexpress.com/item/2KW-electromagnetic-heating-control-panel-2000W-electromagnetic-heater-induction-heating-control-panel/32232152208.html?spm=2114.01020208.3.10.xq2ljd&ws_ab_test=searchweb201556_1_79_78_77_80,searchweb201644_5,searchweb201560_1

Also on eBay, search 2000W induction.   But 220VAC.   Maybe works fine at 120V, and 500 watts output>

On Tuesday, November 24, 2015 at 11:53:37 AM UTC-8, amdx wrote:
>   Somethings are coming back to me.
> If you drive a 40kHz transducer hard enough, you will get cavitation at 
> the surface of the transducer, this will attenuate how much sound will 
> get out into solution. It is blocked by the cavitation.

Perhaps use a layer of RTV silicone caulk as a match?  Or perhaps epoxy?
Something with sound velocity between ceramic PZT and water.

> Here on page 28 is a graph of frequency and pressure required to cause 
> cavitation. At 620kHz we could get much more energy into solution before
> cavitating the face of the transducer.
> 
>   http://tinyurl.com/npc9v4h

Excellent!

Also, focus your beam down to diffraction-limited spot, metal mirrors or 
lens made from ?melted PE? or epoxy, in a glass sphere-flask with some 
mold-release spray?  Never tried it.

Also, produce controlled  low-power cavitation using a microbubble generator 
to provide initial "seed cavities," so no need to over-drive the water to 
produce spontaneous cavitation like a hydrogen bubble chamber.

Those ultrasonic humidifiers and "Mist Makers" run at a little above 1MHz.  
Just stick a scope probe in the water, and it produces enough mV to see the 
drive period.    I aim these upwards in the aquarium, with a block of steel a 
few inches above, and when the separation is right, a nodal pattern of thin 
bubble-regions appears.   Either it's cavitation, or it's just node-trapping 
the existing micro-bubbles in the water, and then growing them via degassing 
effect.   Also, aim the beam to cross a meter-wide aquarium and strike a 
piece of thermal-colors liquid crystal sheet.   You can write on the sheet 
by moving the distant transducer.


> > http://www.ctgclean.com/blog/wp-content/uploads/dw-fig06.jpg


>   I worked with a Physicist that studied acoustics, he designed all of 
> the transducers, amplifiers, driving networks, I just built them.
> Wish now I had got one for myself just to play with.

Rumor:  oxygenated water full of alcohol or methane will, during cavitation,
produce acoustic pulses during high pressure part of the cycle.  A tiny 
diesel engine!  Is that familiar and known?


> He considered this one of his better books.
> > http://www.amazon.com/Sonics-T-F-Bolt-Hueter/dp/0471419761

Heh, that's where I should look up the micro-diesel engine.  Try making a 
micro-combustion-powered acoustic "laser," where the "stimulated emission" 
is collapsing cavitation bubbles full of flammable gas mixture?

On a sunny day (Thu, 3 Dec 2015 00:24:02 -0800 (PST)) it happened Bill Beaty
<billb@eskimo.com> wrote in
<4437fa41-e670-490a-a37e-df2abf0e487d@googlegroups.com>:

>On Monday, November 23, 2015 at 11:26:56 AM UTC-8, Jan Panteltje wrote:
>
>
> 
>> So what would happen if you put one of these in that coil:
>>   http://www.ebay.com/itm/301321475127
>> ?
>
>Hah!  Might work, but also might need a cooling jacket.  Turn down the DC 
>supply voltage.  Also, might need a tesla coil "vacuum tester" to ignite 
>the tube.  Better: wind a copper-tube coupling-coil around the induction 
>coil, then connect the ends to the CO2 tube's existing terminals.  But, 
>will AC high-freq give same effects as DC which the tube expects?

Maybe it will be the first 2 x 2.4 GHz (4.8 GHz on on positive -, and negative cycle) modulated laser beam?

Been doing some ebay searches on lasers.
There is also a lot of high power laser diode stuff.

There is a video of a guy on the net that I unfortunately cannot find anymore
where he has one of those tubes together with an inverter for HV and some lipos build into a hand held gun,
50 W? IR gun, shoots, even without lenses, things on fire on his balcony.
The other development seems to be cheap high power (several Watt) blue
solid state lasers running from 2 1.5 V liion cells, like a flashlight.
Pretty dangerous stuff, I have goggles for red laser but not for that.

I think this one
 http://www.foxnews.com/tech/2015/09/02/laser-cannon-that-kills-drones.html
perhaps uses an array of 10 x 10 solid state 20 W laser diodes coupled with fiber?
Not sure.

On a sunny day (Thu, 3 Dec 2015 00:40:59 -0800 (PST)) it happened Bill Beaty
<billb@eskimo.com> wrote in
<44a3615d-a3b1-4291-bafb-7dda2e7bfceb@googlegroups.com>:

>On Wednesday, November 25, 2015 at 5:09:46 AM UTC-8, Jan Panteltje wrote:
>
>> After long thought I think the problem is that my mama raised me drinking from vaseline glass.
>> At later age I found a locked box in the attic full of that yellow green glass,
>> it gave me a funny feeling when I touched it (little idea what radiation was)
>> 
>> It explains my early enlightenment and my hunger for ever more radiation.
>> And supperior IQ of course.
>
>
>I noticed that during airplane trips, always my creativity would peak about 
>20min into the flight, then slowly decrease.  I always carry a blank book to 
>record the resulting spew of ideas.   (Do others know about this?  It was 
>the origin of mechanical maglev demo, the high speed copper pipes machine.)
>
>Years later I heard an archeology lecture: Apache tribal shamen would mark 
>certain caves with a special glyph symbol, and those "secret holy caves" 
>turned out to be always radioactive.   A pre-Columbian radiation symbol. 
>Radon sources.  Supposedly they convert meditation into visionary experience.
>
>So, do cosmic rays cause altered mental states?  Nikola Tesla said yes, after 
>sticking his head in the beam many hundreds of times.  (That explains so 
>much!)
>
>As the aircraft rises, the local cosmic ray flux goes to a peak.  5mi altitude 
>has very significant ionizing radiation (your geiger counter will roar, fifty 
>counts per second for a small GM tube.)

Now that is a new idea for an altitude based bomb trigger...
Only had coffee just now at zero altitude... :-)


>I have some orange radioactive dinner plates.   But I haven't tried attaching 
>them to my head like headphones.   Maybe we need muons and far gammas, not 
>just yellow uranium compounds.   I will stay with cross-country plane trips 
>for my periodic whole-head gamma dose.

I will stay with my Sennheiser HD201, cheap and decent headphones.
Professor Sennheiser died a few years ago, so get one while you can.

In fact I keep that radiation stuff well packed away and only take it out for experiments.
Things like radioactive watch hands etc can easily crack and the dust inhaled.
The reason I made it to this age is probably that I always have been a bit careful.

I know airline pilots get a lot of rad dose.. They still seem to get old though.