Wattage of rough service incandecent bulbs ??

I guess I'm only fueling the fire but ... I do agree that politics should be kept out of these sites. I have a viewpoint too. But I try to stick to the point of the group. Long time consuming comments on politics are unneeded. I truly truely truely bel ieve we will convince no one on-line (and probably off line too.) In my who le life I have never ever had anyone say to me, "gosh your right I was wron g, I'm voting the opposite way this time."

I'm frustrated that I ! have go to block or filter people when the group is electronics. There are 100's and 100's of sites for this kind of discussio n. It seems everyone says we need to turn the rhetoric down but then do lit tle about it. I also note that some of you are very intelligent people elec trically. I would don't want to not receive advice electronically from you. So if i did block you then I would miss your experience and knowledge. Tha t's disappointing.

I'm frustrated that some groups have been taken over by Spam or spam like p osts. To me the NG should blick them. Censorship be damned. But you can't filter everything I guess. Not every discussion should be or has to be abou t politics. We need the breaks of pastimes to calm our nerves.

My intention in saying this is not to rile upset or cause anyone to be abus ed, specially me. Thanks for listening.

Yeah I found out about it in one of Jim William's articles. fun stuff. George H.

g time consuming comments on politics are unneeded. I truly truely truely b elieve we will convince no one on-line (and probably off line too.) In my w hole life I have never ever had anyone say to me, "gosh your right I was wr ong, I'm voting the opposite way this time."

is electronics. There are 100's and 100's of sites for this kind of discuss ion. It seems everyone says we need to turn the rhetoric down but then do l ittle about it. I also note that some of you are very intelligent people el ectrically. I would don't want to not receive advice electronically from yo u. So if i did block you then I would miss your experience and knowledge. T hat's disappointing.

posts. To me the NG should blick them. Censorship be damned. But you can' t filter everything I guess. Not every discussion should be or has to be ab out politics. We need the breaks of pastimes to calm our nerves.

used, specially me.

Yup... I guess it was really my fault. (I gave DT the +1 for reversing the ban on incandescents.) George H.

Coal is still needed to manufacture steel. Both to make Coke, and to add carbon to the iron ore. I grew up in a steel town. Long trains of open top ped cars deliver coal, around the clock. They are dumped from the bottom as they pass over a huge hopper, to be delivered to one of the piles.

They had piles that were hundreds of feet high, since they kept more than a 30 day supply on site, in case of strikes or mining problems. Across the h ighway is an Owygen reduction plant where air was compressed to liquid, and the various gasses are boiled off. The Nitrogen goes to making fertilizer. The oxygen has three markets, but there is a pipleline directly to the fur naces to make steel. The rest was sold for medical or welding. The rarer ga sses were sold to various industries. Everything from Helium, up.

The TS-382 series were military versions in transit cases. They had a vibration reed frequency meter to display 60 Hz and 400Hz. The insides were protected for Jungle use, and the one I have, (TS-382/F)has heat strips to drive moisture out of the cabinet.

I don't know if it is necessary to make steel. I remember a documentary about steel recycling where they were using carbon arc furnaces to melt and make steel from ferrous waste.

They mentioned that they had a relatively small window where they could source cheap off-peak electricity from the grid, but the energy to melt it was electrical. (except for the graphite electrodes)

Of course that may just be some small mill turning out ingots of "boutique" (special purpose) steel.

One other interesting aspect is that they'd take samples of the steel to a lab then send a list of additives to the floor to be added to the molten metal. Some of the chemicals were thrown in by the bag-full, bag and all.

I can agree, to a point. The NGs that cater to the ideologically-driven are clogged up with people who are incapable of rational thought and take their marching orders from a "personality" without analyzing what is said as long as it makes them feel secure or self-righteous. They'd rather buy into a load of bullshit than leave the herd/cult/society/gang/religion etc. they feel comfortable in.

At least in a science or engineering group there are people who still know how to think for themselves.

AND having worked in science, industry, and the military all my life I have to question my choices. As engineers we are geared towards finding ways to achieve what our corporate sponsors want, but don't we also have a responsibility to humanity?

What are principles worth, if you can find them easy to ignore? Who are you? (not "you" personally...)

Don't beat yourself up over it.

You know that "stock footage" where they show the optically guided bomb hitting a concrete block building? I probably had my hands in that, so my perspective is different.

nia

ng.

add carbon to the iron ore. I grew up in a steel town. Long trains of open topped cars deliver coal, around the clock. They are dumped from the bottom as they pass over a huge hopper, to be delivered to one of the piles.

n a 30 day supply on site, in case of strikes or mining problems. Across th e highway is an Owygen reduction plant where air was compressed to liquid, and the various gasses are boiled off. The Nitrogen goes to making fertiliz er. The oxygen has three markets, but there is a pipleline directly to the furnaces to make steel. The rest was sold for medical or welding. The rarer gasses were sold to various industries. Everything from Helium, up.

Do you have any idea how much more is needed every year? Remelt couldn't begin to supply enough.

Would you trust a bridge bout of cheap remelt? Do you remember the crap Japanese steel in the '60s? It was all remelt. How about Rebar? It is so lo w grade that they don't specify what they remelt. It is old wire, scrap iro n and old machine tools. Things that they won't use, anywhere else. I've se en imported steel that had large, used ball bearings embedded in the sheet. Try working with that!

I'm not talking a small operation. It runs full tilt, 24/7. I'll bet the motors on the hot strip, and at the cranes use more electricity than one o f those remelt companies. In fact, there is a peak shaving power plant that can power the entire mill, during major outages. It uses three large GE Je t engines. It can feed the grid for peak shaving, or feed only the mill whi le an entire town is dark.

What's so interesting? A friend of mine retired from that company as an Analytic Chemist who ran test on samples from every run This company develo ped Aluminized Stainless for Catalytic Converters. They made the special st eel used by Aeronca Aerospace for the honeycomb steel heat shields for the early Space Program. They manufacture steel for cars and appliances, along with their prefab steel buildings. All different grades, thicknesses and pr ocesses.

You have no choice, if you aren't doing engineering specification and inspecting the alloys. There's strength specs, and structural steel includes the lowest grades (which is OK when you use a lot of it). Soft steel bends rather than breaking, that's a virtue.

But yes, remelt cannot supply enough steel, there's still mountains of ore in Australia, furnaces in Korea, Germany, Poland etc. and plumes of exhausted CO2. The coal for smelting ore to iron is high-grade (low sulphur) stuff, converted first to coke for purity. To my knowledge, the only substitute for coal is traditional Swedish steel made with charcoal (still carbon, of course).

coal is not needed there are other processes such as direct reduction that can be fueled with hydrogen or natural gas.

Are you sure? What kind of container holds a few tons of ore and enough hydrogen or 'natural gas' to reduce it? Doesn't hydrogen attack the oxides in firebrick?

replace imported coke and coal coming from oversees and instead use hydrogen produced from fossil-free electricity. Hydrogen will then be used as the main reductant to reduce iron ore and produce metallic iron. And this process will only emit water vapor instead of carbon

More:

h hydrogen

irebrick?

il

-2018-19-green.pdf

yeah, but... the temperatures are VERY high, how do you keep the H2 pressure up and ensure container integrity?

The process flow, too, seems to require very finely divided ore input, beca use the particle surface is the only reaction site, and the ore heating is not mentioned, nor slag s eparation. It seems the first pilot plant will have some kinks to work out, when it's starts in a few months. The engineering for full-scale uses isn't projected this decade, nor next.

Those are just engineering concerns.

In grammar school I'd generate hydrogen with lye, aluminum foil and a little water. You get a vigorous exothermic reaction and hydrogen (along with some water vapor and sodium) I'd bubble the gas from the generator through some water to cool it, or it would burst the balloons I was filling.

We'd send balloons aloft with home-made flares and fuses into the night. Great fun. The balloons would drift out over the Hudson river and be miles away before they burned with a big sodium flare and a "whump" sound seconds later.

What was unique, or seemed so, was the temperature of a hydrogen flame in air. With a glass tube drawn to a point, a flame the size of a pin head would melt the edges of the tubing. That, and how easy it was to light off compared to other fuels/vapors seemed amazing.

I told some idiot at work about my childhood experiments and shortly after heard on the news where someone was putting aluminum foil lye and water in screw top bottles and letting them blow up. It was "under investigation."

Without the sodium in the home-made hydrogen, the flame is nearly impossible to see in anything but a dark room. With gas chromatographs, we had at the place I worked, they'd check the ignition of flame ionization detectors. with a thick watch glass and look for condensate to tell if the flame was lit. (the detector block was electrically heated, so heat couldn't be an indication for ignition)

I remember those from navy ET-A school. They had two resonant reeds, for 40 HZ and 400 HZ.

In the field we had almost all commercial equipment and not the Army-Navy near-indestructible versions of test gear. We did get one O'scope, big, heavy thing, that had among it's design requirements that it be able to fall from a height of 5 feet onto concrete and remain in calibration and operating condition. There was some talk of testing that, but I don't think anyone did; and I think the concrete would suffer if it had been.

should have been 60 and 400 HZ

bration reed frequency meter to display 60 Hz and 400Hz. The insides were p rotected for Jungle use, and the one I have, (TS-382/F)has heat strips to d rive moisture out of the cabinet.

I've never seen one for 40 Hz. Only 60Hz or 60Hz and 400Hz.