Could this be used for Fractul wood burning .I use a microwave transformer now. How ever someone gave me a Harmon kardon 7300. It doesn't stay on maybe 1hr or 2 then shut off. But this transformer is huge and the whole unit is a boat ancor.

Yup, transformers are electricity's transmissions.

Seems very similar indeed as a mechanic I can relate

Schools are trash. Efforts for making these types of videos comes from creators heart, not from some school trying make business

@@saitamapreetsingh3057 Right on fella.

Hb

Typically I've seen a rubber or other insulation shield that rest between the hold down and the transformer. As well as the transformer is nearly always tightly wrapped with an industrial type of very durable plastic

kzfaq.info/get/bejne/hZhyZ9ydztyal6M.html

It is listed in the description of this video.

It may no longer be considered 'magic' per se, but thus far, everything that we know or claim to know about electricity and magnetism is 'theory'. A set of beliefs that describe how we can interact with, and what we can expect from, as a reaction or result of our low brow fumblings are still known as electrical 'theory' and even recently here on KZfaq certain foundational beliefs were contested. At our current level of understanding, it would be impossible for us to claim one person was right the other one was wrong, as it's all theoretical anyway and what was in question was concept and not solutions. Much the same as dark matter, we can make predictions that appear accurate, equations that add up mathematically, and other highly accepted 'promises' that feed into our beliefs, yet we remain as childlike in our understanding of magnetism. No tangible evidence, only enigmatic forces that humans have monkeyed around with just long enough to be forewarned or smart enough to know better than to stick our finger into a light socket. I do find it all a bit amusing. Likely, there are fields of techno knowledge regarding this mysterious force that those of us on earth have yet to even conceptualize, let alone harness. I hope I live long enough to see the advances I believe exist, and what seems like magic or impossible to us now will become a common part of our everyday lives. It's inevitable, these advances, of which and I don't even know the extent of what I am imagining. And in hindsight many of you more highly educated will be thinking- "it's been there right under our nose all along, totally obvious, not hiding at all, just waiting to be found, so what took us so long?" I suppose we are just waiting for the next download of data to be dropped off by the aliens. Hard to say who our next Maxwell or Einstein will be.

Is your reference to Mechie an Australian slang for mechanic, like , you specialize in the automotive field? If so, I have a great respect for a person who undertakes such an eclectic array of devices and gadgetry that must work together as one- like that adage, the sum of the parts is greater than the........uh, devices that add up to more than the pile of parts itself. The reason you hold such high esteem is the simple fact that when that machine is operating people's lives depend on it. Yeah plumbers get paid a lot, and I. T. guys they're pretty slick but for the most part none of those guys work is going down the road at 90 miles an hour or I mean 120 kilometers per hour

Yes

No, he said that THIS transformer is used to step down the voltage as the number of windings on the secondary side is lower than the number of windings on the primary side.

Only if you count number of turns on old secondary as you take it off then from input - output ratio you can calculate turns on primary. This will then be number of turns for new secondary so they match, assuming no losses.

@@rodd8170 thanks for your reply bro what if try to wind 10 turns of gauge 18 awg magnet wire and measure the output voltage and calculate total number of turns to obtain 240vac? Is that possible instead if dismantling the secondary windings..?

Yes that will give you a rough idea, trial and error to find correct nunber of turns if you dont want to disturb orig secondary winding

Thickness of the transformer wires. Connect more and more current loads until it burns out. You will know in the future what power he can transfer ;)

@Google user thank you so much. I was thinking it might be a 160VA transformer, used in a 50W/8R amplifier. The 6.3A fuses are just above the average 5.5A max limit for the 160VA trafo's I've seem online. Once again, thank you very much.

@Google user 190VA would be great!!! 😃

Efficiency can reach 95% or more, whilst a more "conventional" iron laminate transformer will be 90% or less. Toroidal transformers are primarily about efficiency and minimising stray magnetic fields, but they are also somewhat more compact. However, transformer efficiency is a complicated subject, but ultimately what you want to do is minimise hysteresis losses as the magnetic field changes and inducing eddy currents in the core (also, not saturating the core either). Then there is minimising resistive losses too, so there is no simple answer. But if you want transformer efficiency, you don't do it at mains frequencies using iron cores, even if they are laminated.

@@TheEulerID That clears up my questions on the transformer efficiency. That leaves one more that came to mind. When it comes to old welders that are the transformer types most are the e-type which have an aggressive arc. I used an old triodial type which really had a smoother arc with the same penetration. Why is that so ??? Thanks Steve and good day too. vf

@@victoryfirst2878 This is what came to my mind watching the video. I've had a few old style welders with the laminated cores and wonder how well a toroidal transformer would work in a welder. Would a solid, non-laminated toroidal core be just as efficient as the laminated regular ones? Seems like multiple taps in the secondary coil would make selecting your output amperage easy.

@@siggyincr7447 Would cutting out the laminated core from an old three phase auto-transformer placing the three laminations side by side and cutting out the donut keep the efficiency of say a one piece unit ??? Also, would using multiple wires instead of one large output wire improve the overall performance and duty cycle ??? Thanks vf

@@victoryfirst2878 I'm not an expert on any of this. But as far as I understand it, making a laminated toroidal core should help reduce eddy currents and the associated losses in efficiency and heating of the core. You could use multiple wires for the secondary winding which would make it a bit cheaper by only using the heavy wire on the section that would be used for lowest voltage/highest amperage output. Then keep progressing down the wire sizes and connecting them at the tap points.

EE here. - Depends on the application, In transformers there are subtractive and additive arrangements, depending on the polarity of the windings it is possible to create combinations to obtain specific voltages, (This since we know that a force can be added, subtracted or neutralized according to its magnitude and direction) now we must remember that transformers are machines that work if and only with alternating current, direct current being a "constant" does not have changes, so it does not produce any effect on the winding (except heat and eventually destroy it by short circuit, since we must remember that for electricity this is just a resistance). -the only pulse we would have would be during the connection and disconnection of the DC, that is when there is a change of value from X to 0, But there is no negative step, unless we invert the polarities and repeat [as close to these alternating pulses would create a square wave, however this wave would no longer be DC but would become AC]. -On the other hand, the behavior of the windings is not the same under a sinusoidal wave as under a pulse of square waves, triangular waves, etc. and although there is an induction, we must remember that electricity must have a path through which to flow. [in this case in the secondary]. So in ideal and simple conditions, if there is no load through which the voltage flows connected to the other conductor (potential difference is theoretically 0). -[It's like filling a bottle of water without leaving any air inside and shaking it, the water simply won't move, because it has nowhere to flow]. or imagine a pipe completely full of water with a faucet, we know that there is more water [like from a tank] trying to flow, but when the faucet is closed, there is no way to flow and the water does not move, or there is no more water in the first stretch of the pipe than at the end, [Potential Difference 0]. -If we put ourselves more into practice, let's imagine a simple battery, we know that the energy is inside but if there is nothing connected to the terminals it cannot flow and a change of state is not generated [of course this being perfect and omitting more technical things like self-discharge, electron leaks in the insulation etc]

@Mihály Tóth Yea in a laptop charger it is smaller, but in a pa amplifier they can be about the same size.

@R Zarc You are right but I am sure that the transformer in a switch mode psu has actually got a ferrite core, not an iron core because of the high switching frequency.

Not really, there are automated machines that can do that in just a few minutes.

I see we're here for the same reason.

Ding ding. Ding. Ding… most people do not have a remote clue. As above, so below…

The high efficiency of a toroid transformer along with its high output current is due to the windings wound in such a way that they literally follow the magnetic inductance that surrounds the iron core.

Almost, a variac it technically a Autotransformer (or Autoformer).

use a thermistor