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Post by Deleted on Oct 31, 2013 16:25:27 GMT -5
that is sick you can go buy used stuff like that easily. That would be $500-800 here. $1600 new maybe even $1200 used.
I am moving to atlanta to start an ebay business selling from those shelves! lol
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jamesp
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Post by jamesp on Oct 31, 2013 17:09:50 GMT -5
A lot of stuff is sold by the pound. I bought a small oven for doing 50 pounds for $25. it is for 350F. I will take the thermostat and element out of it and put it in the 300 pound oven.
Tune it to stay about 200F for drying. The dryer you get the rock the hotter you can wack it w/heat and thusly get richer colors.
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Post by rockpickerforever on Oct 31, 2013 17:10:15 GMT -5
Purdy is highly overrated. What matters is how much it set you back, and how well it works. And, of course, it helps to know what you are doing. Agree with Scott, that kind of stuff, even used, is expensive out here. James, I hope you appreciate your local junk yard, you get some killer stuff from them. Scott, if you're going to move there, first you have to learn how to say it - "Adlana."
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Post by Deleted on Oct 31, 2013 17:17:27 GMT -5
+1 to the sixth power to rockpickerforever for the above input. "Adlana" Jim, how come the airport in "Adlana" doesn't hire white/hispanic/asian/arabic folks to work there?
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jamesp
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Post by jamesp on Oct 31, 2013 17:34:54 GMT -5
You two would be high on my list for a visit. I would thumbs up Earl for you guys. Lots of people i bring out there try to talk him down from already ridiculously low and they will never come back w/me. Earl knows if i turn my back to him while they are doing that he should take liberty. Been going there for 25 years. Have others junkyards around adlana too. There are wood boxes full of thousands of pounds of reamers and end mills and machine shop bits up to 4 inches across. Local machine shops come there to save dollas(dollars). Every 6 months it goes to the scrap metal place for pennies a pound. That oven messed w/me. It said 250 watt @ 120 VAC and 1000 watt @ 240 VAC. And rated at 550F. No way 250 W was going to 550F. Called the place and they said to connect it to 240 to get 550F. And the single element is only $78. Gotta build a shelf to put the sand pans on. I think power is the square of the voltage all divided by the resistance. P = Voltage X Voltage/Resistance. I did the calculation and that is so. Coral beware.
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jamesp
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Post by jamesp on Oct 31, 2013 17:42:06 GMT -5
Seems to me i was the token white boy when doing work for them in the past. The last job i did was a long time ago and the crooks had high dollar cars stashed in the landscaping barn and i met ex-mayor Maynard Jackson. Those folks don't like swamps at all. I made lots of money off that fear over the years here in adlana. Even Evander was a candy ass about swamp critters. I should a slapped the taste out of his mouth
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Post by Deleted on Oct 31, 2013 18:03:28 GMT -5
If you half the length of a resistor you get 4x wattage output. Inverse square relationship there. That is the trick they are exploiting.
I'll stay away from your math above.
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jamesp
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Post by jamesp on Oct 31, 2013 18:40:06 GMT -5
you said the same thing as the math said. and that is all well lest heat have a discussion w/your resistor.
The strip resistor in the new oven is a good type used in demanding industrial situations. I could hear vssst vssst vssst in the old oven. Arcing and soon to be an open resistor. And it glowed a colder orange in the dark than it's twin and had a real cold spot along it's length. This new oven is old but it is very hand crafted in areas and very personally built. I like the vintage flavor it exudes.
I liked what dave1 said about putting oily slabs out of the saw into sand in a pot on a hot plate to evap the oils away. simple and sweet
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Mark K
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Post by Mark K on Oct 31, 2013 21:06:56 GMT -5
what do you use the 2 liter soda bottle trays for? You must have 60-80 of them in two stacks. Do you know the diofference between envy and jealousy? I envy you. Unless I am mistaken, those are flowerpot trays.
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Post by Deleted on Oct 31, 2013 21:15:27 GMT -5
actually I am pretty sure this math is incorrect. It said 250 watt @ 120 VAC and 1000 watt @ 240 VAC. And rated at 550F. No way 250 W was going to 550F. Called the place and they said to connect it to 240 to get 550F. I think power is the square of the voltage all divided by the resistance. P = Voltage X Voltage/Resistance. I did the calculation and that is so. Watts/Volts = Amps 250 watt/120vac = ~2 amps 1000 watt/240vac = ~4amps Nothing in your post discusses resistance. Only watts and volts. Here is a pretty good calculator to see my math.Here is my guess. The 240VAC element must have a second element connect at higher wattage to the second 120VAC lead. It's 240 volts, but really 2ea 120VAC heaters, of different resistance. That mi amigo is a given!
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jamesp
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Post by jamesp on Oct 31, 2013 22:21:07 GMT -5
i think i did mention resistance. " I think power is the square of the voltage all divided by the resistance." Read more: forum.rocktumblinghobby.com/thread/61701/industrial-rock-cooking-oven?page=4&scrollTo=704555#ixzz2jMPNUUitwatts=amps x volts watts= volts x volts / ohms volts=amps x ohms I know the watts in 2 instances and the volts in those instances so i solved for the resistance. Let's substitute for 120 VAC and 250 watts and use the second equation to get the resistance. 250=120x120/R or 250R=120 x 120 or 250R=14400 or R=57.6 ohms Good. Then i should get the same resistance for 240 VAC and 1000 watts 240 VAC 1000 watts 1000=240x240/R or 1000R=240 x240 or 1000R=57600 or R=57.6 ohms So they told the truth on their name plate.............. And what you said is true too V=I X R or I=V/R or I= 120VAC/57.6ohms=2.08 Amps----------240VAC/57.6ohms=4.17 Amps
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Post by Deleted on Nov 1, 2013 12:44:59 GMT -5
aha! I missed that!
I am properly spanked!
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jamesp
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Post by jamesp on Nov 1, 2013 15:45:50 GMT -5
your glasses are a bit on the dark side...
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Post by rockpickerforever on Nov 1, 2013 16:55:03 GMT -5
James, Scott just uses that for an excuse.
Don't know much 'bout electricity, 'cept it ain't cheap around here. An iff'n you don't pay your bill, they'll turn you off, lol!
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Post by 1dave on Nov 1, 2013 18:17:07 GMT -5
you said the same thing as the math said. and that is all well lest heat have a discussion w/your resistor. The strip resistor in the new oven is a good type used in demanding industrial situations. I could hear vssst vssst vssst in the old oven. Arcing and soon to be an open resistor. And it glowed a colder orange in the dark than it's twin and had a real cold spot along it's length. This new oven is old but it is very hand crafted in areas and very personally built. I like the vintage flavor it exudes. I liked what dave1 said about putting oily slabs out of the saw into sand in a pot on a hot plate to evap the oils away. simple and sweet Well, wipe it with a rag, swish it in Dawn dish soapy water and wipe again first. I've been thinking about this. Alkali water dissolves quartz and precipitates calcite. Acid does the opposite. What if I were to BOIL my fractured slabs in alkali water, then titrate it to light acid. Would that heal the fractures? It happens somehow in nature.
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Post by rockpickerforever on Nov 1, 2013 18:56:59 GMT -5
Maybe in, oh, about 100,000 years? I would assume time has to figure into the equation somehow.
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jamesp
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Post by jamesp on Nov 1, 2013 19:02:35 GMT -5
I think so many of those dissolved silica reactions do take for ever.
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Post by Deleted on Nov 1, 2013 19:19:11 GMT -5
Maybe in, oh, about 100,000 years? I would assume time has to figure into the equation somehow. It is my opinion that is doesn't take 100,000 years to make agates. I't is my rather unqualified yet humble opinion that that layered agates are one rainy season per layer. Thinner layers in places where there was less rain when they formed. If, because rain dissolved it all away, additional alkali is needed to complete the stone, then we must wait for an event to supply that alkali. THAT, then could make us wait 100,000 years or more for the process to complete. Forest fires have come to mind since we discussed this in relation to Jim's coral. The chemistry described by dave is exactly the chemistry I am using for synth-agates. Also, there is evidence that some agates are as much half carbonates. The plumes being calcite/aragonite.
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grayfingers
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Post by grayfingers on Nov 2, 2013 9:11:50 GMT -5
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jamesp
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Post by jamesp on Nov 2, 2013 9:56:07 GMT -5
I will say Scott; after looking all over for the answer to agate formation i wonder if any one knows.
If it was easy or a test tube material it would have been made a long time ago.
I have never heard of a room temperature silica formation.
I have read theory of how Lake Superior agates were formed. A lot of it was just reading cause it was over my head!
If you told me you had a relatively cheap formula to make brazilian agate nodules i would probably freak out.
While typing this a bomb hit me. About resilicified botyroidal cavities. Let me see if i can find photos.
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