 Hey YouTube, hey this is a I saw a little play around this little experiment with what would happen if I created two coils and they can be the same inductance which on these is four it's just over four millihenry four point zero five millihenry and they're near enough both near enough both the same meaning they're sort of like a ten millihenry out of each of us if that so we've got a little oscillating circuit yeah little two two two and two two two two 22k resistor and the LED works so and what I wanted to do was see if this coupling here flux how much difference there would be if I put a ferrite rod inside here inside here not and because I haven't got two threads I've already got one so I can only do it or inside here and what after some playing around is better in this one for the helper which is just set up there 20 volts pedivision and at the minute there's a little time for the oscillation because it's it's a distance so I'm going to do is I'm just gonna push the screwdriver that as you can see over there as I push it closer together so that's about distance and as I push it closer we got 33 volts and that's about distance and then use this and this is set here so it only goes down a certain depth and this is pretty much where it is strongest I could baff about and try and tweak it a bit better but it's you know it's just about there and I'm going to pop that in the top and over there with at that distance we've got 4.3 volts already in this is a frequency of 4.5 megahertz so I just push that together and even at that distance we've already got 10 volts Zara mess as well 23 volts that's some 37 volts 45 volts 50 volts that's back to pretty much how close to the other ones that's probably a bit too close because it's getting a little bit a little bit that's going to keep a nice side away there we go so about 52 volts about 51 volts say 50 volts and that's nice that's 50 volts I said it is going to be different so we're going near it and as you can see if I just pull that away a bit take that out I don't know what's happening in the signal I think I need to redo it I'm turning it down again from the pizza sensitive that's still pretty good so all I was trying to show anyway was that if you put a ferro core in the fire rod if I put it all the way to the end like this it's not as good it's not as good look over there you can see we've got nothing you've got pretty close to go in the thing you guys start pulling that rod out and then we get the yeah but that's pulled out so yeah just before I leave that just look at the boxes look and the current that's being drawn and over there it says we've got 18 volts on this side I'm just gonna turn out this light that's not really good but then you can see there you go you see how close I've got to be to get this to light up with this tube it's really from this side I'm gonna get pretty close to that main coil but look so that's coming off that second one thanks for watching