 hey there right this is uh i need a gate drive transformer yeah uh because i want to build in another solid state tesla circuit but this one's going to be using more power and so i'm going to require a gate trans gate drive transformer now i'm right on three here and there's three different sizes we're going bigger smaller smaller and this one is like a yellowy with a blue on the outside a light green i should say not yellow i don't know why i said yellow i just just did this one's green and this little one's green now i don't know you know what the permeability is what the what how good they are at doing their jobs these particular cores i know how good these are because i've already tested them i'm just using my uh frequency generated air and of course got the scope so i can see what the output is so first of all i thought this one was going to do well and the reason why i thought it was going to do well is because i was pretty convinced it was the same type as what i've used in a in a you know like this dual-fifth type circuit because this does pretty well now i have not wound this dual-fifth type circuit on to any of the coil uh ring i've only gotten to this and this seems to be the same like the green with a blue top as this one i'm going to tell you now this one's done the worst this is rubbish and these two are done pretty good and they've all got 14 15 turns on them and they're all you know dribbler wow and i made it easier because i've got three different colors i've got blue with a white stripe and this is the same on all three blue and a orange and white stripe so the orange and white stripe is i'm using as my primary now i've got two secondaries yeah so i'm going to show you the smallest one first okay so hopefully you can see the scope as well as uh as well as the frequency as well as the function generator so i'm going to put the small one first so like you see it's very easy it's got the primary i'm only going to connect up one channel i'll connect up the other channel because this is supposed to be inverting one time to the other isn't it so uh because you never want the two MOSFETs on at the same time otherwise well it kind of happened so i'm just going to take one now so i'm just going to put them to the solid blue just a little bit easier and the solid blue here and that's at that's at 50 50 hertz 50 kilo so it's pretty low so if i just start whipping that up i don't want to point out i'm right in the way but i'll just start whipping this up and again there you go as we get on like a hundred that's that that's a hundred uh kilo hertz and as we go up it's 300 i know as you can see look that's that's not looking too bad at all not looking too bad at all that's 750 let's go over and make so that's that that's at 13 14 okay and that's uh that's all right that's pretty damn good okay so let's just take a look back down again i should probably just move that across there take it down really quickly and then let's put on um then let's put on this one this is the one that i thought was going to do the best so quickly i'm going to do those i'll just one channel on the way so again same color color coding again just makes my life easier i'll connect to the primary this one connected to here okay i'll start taking this up okay look so this is at 500 kilo hertz and and it's absolutely terrible if i go low so that's a hundred kilo hertz that's like 30 oh 30 absolutely useless and as we go up it just doesn't get any better so the actual core that's at 510 kilo hertz so the actual core and the actual um it's rubbish absolutely rubbish that is i don't know where that's come from but that's a piece of junk for this and then we got this one it's still on 500 let me just turn it down to there we go 40 just give it the uh give the signal don't mind which way you connect this up because it's automated there we go then let's just connect up to the solid blue you've got the fingers turn them out and look at that look that's at 40 40 kilo hertz so if you go up to 100 90 100 and that's nice that is pretty spanking really isn't it and let's just move that across a little bit 100 kilo hertz at time 200 300 400 five and as you can see look we're at 1.2 now 1.8 that's that's 2 mega hertz so we're quite safely saying that these uh green ones at least these particular two green ones uh make decent g-drive transformers in comparison to to this one this one's absolutely terrible okay we're going to go down to connect to another probe and uh check it so it's being inverted but that means i'm going to flick the phase across on this and i've just got to figure out how you do that okay um because we know that this one's rubbish so just wound onto this yellow one as well just to see what this is like uh because i'm just going through what i've got basically because i think this is probably going to help out quite a few people to the yellow one again that's absolutely rubbish that's like 80 kilo hertz even if i turn it up it's it's not going any better it's not showing to be a square over at all it's just a bag of poop so um this is like white sort of creamy underneath and yellow on the outside no good no good i'm not trying one of these i'm going to give it a go low why not it's only 14 15 turns and i've already made the wire i'm going to assume that this is i mean this is just calm my choke anyway but then so is this but look this is on green again so i'm going to unwind this reluctantly i'm going to unwind it and i'm just going to see if that's uh where the funny thing it's going to be exactly the same as this this one here so i'm pretty sure they're about the same and it's the same sort of this is slightly different color green but we'll see so we can do isn't it just try and see look that but that's not what you want it's not good to anybody no good to anybody and it's not inverting i just noticed okay the others do by the way when i connect with the others the same as what i've done here they invert which is what you want because you don't want like i said earlier you don't want two more spits on at the same time so here i've used one of these black power supplies i'm going to assume that this possibly it's got some markings on that possibly it could be the same i'm going to give it a go anyway it just actually takes five minutes doesn't it but that's on uh that's on 30 kilohertz as we go up the frequency so you go up to 170 now and although it is looking at that that's now 340 370 450 we keep going up i'll probably see that this works happiest with this frequency so that's one megahertz okay this is two megahertz in there a bit that doesn't look too bad at all does it that's two megahertz that's two and a half three megahertz that's right i'm gonna switch it to hundred four five six hey there far out of where we want to be so that's no good at all if you did it's no good okay so again with the green one again look uh 40 40 kilohertz and that's not too bad at all that's not too bad at all but if i start going up now i'm gonna go up i'm gonna go up to a hundred kilohertz first there you go there's a hundred kilohertz and i'm gonna start going up a hundred kilohertz at a time so let's just make that a little bit bigger 200 kilohertz three four five six seven eight nine one megahertz so as you can see that's uh that's actually pretty damn good 1.1 two three four five six seven eight nine ten that's two two megahertz not bad at all but they do need to be inverted against each other just check my child so i could cheat inverted like that so that's a good one that's another good one let's say that's that's a that's a two two megahertz so keep going up three megahertz let's just go in again look at that look of course it can't you can't do it forever unless it's seven megahertz but we don't really need that up there okay okay that's one megahertz so yeah so it's the green one so all three of these green ones of uh success all three and the other the other ones are negative at all negative at all tried that we didn't try that one we tried that one this one this one and the green ones so it seems like no matter what no matter if it's little or small on the green ones they all work as well as each other yeah there we go so i know what i'm gonna be using for my gate drive transformers and it certainly won't be these if that's pretty much the same as that that was rubbish i just wondered what that would be like that's good for a cheque i'm sure these would be good for cheques as well but that does work all right okay that's that then bye