 Hey, hi there YouTube Right, I've been playing around this this tube Circuit again This has I've derived this from a headphone circuit Now when I plug in my zen eyes is here This circuit kicks ass Okay, it does it's is what is it in actual fact the way it's set up now. It's way too loud And I'm glad there's all these like current game controls here so I can actually I can turn it down But I've got it turned up For now because I want to give the demonstration through my speakers Because before when I set this up It didn't work very well through my speakers at all You turn up to give any sort of like volume and it was just rubbish now on my I've got it driving up my laptop here because I'm using my camera Because it's got a baddest It's just it's just got a better sound pickup than what the little Microsoft camera has and it it gives a better Quality resolution as you can see you sort of focus in on things and It may not be that good, but it's better in the other one anyway So I've made a few differences long and the main differences are is I'm using IRF 630s instead of the IRF 510s 610s that it shows on the circuit and As you can see there on the right is the IRF 630 the left one is the LM 317 and it's in configuration as a as a adjustable current control And that's also the same on the left hand channel here, of course as you can see I All of the capacitors in Nishikon I put 470s in on the gain which is these wires are color-coded so the orange is the The the cathode the green is the grid the black is the anode the two browns at the back here are The heaters and this white one here is a center tap for the heating. It's running off 12 volts 11.9 and The 680s here on the output which is coming directly off the Well basically it's coming off the input of the LM 317 Okay, and so they've all been changed pretty much from the spec. I'm using AX 12 AX7 rather than the 12 AU7 Yeah, I suppose so, you know pretty much evidence is normal, you know as per the spec on the On the thing with you now Let me just pull that back up on the screen because I've seen this circuit a few places now And if you see my other video where it's not working very well at all out the screen because you'll see that the circuit Actually came from somewhere else in here It's from this Tiger X X-FI So I don't really know and I've seen it somewhere else as well, but I can't I haven't actually got that image to show you But it's one of those there's so many now I've seen this one particular author of websites who says he's a Professional blogger. He's just blogging this stuff all over the place and putting his name on it as well It's starting to come a little bit, you know, but let's not get into that So yeah, I suppose you want to have a little a little listen to it Yeah, so I'm gonna pull back here a little tiny bit so you get a bit of benefit the speakers And I'll just hit the Play on the track now these are just like MP3 tracks are low quality Unfortunately, I don't have anything high quality on that chip. It's all just It's downloaded music from I think Jemendo. Is it the you can get creative common license and that's what this is It's the low quality stuff creative commons just for you know, I'm not trying to make any money up any of this So, you know, it's all good I don't play sorry I'd like to pay to play more of that I can't because I don't want anyone to get upset and get a couple of my nurses Oh So I don't want to get into any trouble and hopefully I'll put all the names of the artists and such in there in the description Usual so I'm quite tough with that. I was really looking for a A stereo preamp circuit I couldn't find one that I could actually I Spent between 15 and 16 hours yesterday I'm trying to build Emulate other people's circuits and I couldn't go into work So I resorted back to this one and I thought it could be the tube I'd naked it because I'd tried all sorts of components in different ways of setting it up positive bias negative bias And come the end of the day I was losing I was I was almost losing my coordination So I had to call it an evening and Today I thought well, so I'm gonna do I'm gonna use this tube just to make sure it's working I'm gonna set it back up on the board. I start thinking maybe the board had problems I don't you can see the red bits on the board and there's red bits down by that MOSFET as well There the areas that don't actually work where you can't plug anything in or you don't get conductivity off the board So I did a lot of checks on that earlier before I started building just mark up. So I didn't plug into them is and it was false So I thought I will build the headphone circuit with modifications Because of course when I tried the headphones said before yeah for the headphones. It was great I did have to hear some stuff, but I've made a mistake And but it was no good trying to get it to current speakers With these slight minor mods and the search I managed to get it so it's plenty loud enough out of speakers and It's and it does sound good and there's no hiss. No, no, no, no, nothing. It's it's nice It is nice so even though I couldn't get to those other circuits working I hope the two chaps I spoke to On YouTube about their circuits. I hope they do get back to me Because I wouldn't mind being able to make those circuits work because I'm sure that they're gonna work really really fine and I will And I certainly give it a go because I just want as much experience building these things as possible, of course Because that's how we learn isn't it? So anyway, if you got this far I Hope you've been impressed with you know the changes I've made especially if you watch the other video of me making this and How it didn't sound very good at all Going through the speakers and that's you know, that's what I've been trying to get I don't need to blast out music. I want to blast now. I'll put the name 70 and 75s on because they do rock But for this it does have a different sound. There is a warmer thing to it And that probably is when I get my rival it'll be here tomorrow Yeah And then I want to have to use this thing over here and of course the right I've got the FFT which are like easy to use you can put on the back of the screen and have your waveforms on the front I will do some some power testing on it and we'll see what we got Yeah, so I Hope you enjoyed this my little demonstration of my I'm not gonna say it's my circuit. I have made some changes, but I've not made enough change to say it's mine at all because I've just built it off you know the The one that's on the internet there But I would like to be able to build my own idea you have I think you can see that little on there When there we go, there's a very basic circuit I might even put the not put the values in because I've not made the circuit yet to my own values there I'm sure it won't be too long. I'm hoping it won't be too long before I'm doing that sort of thing So if you like this Give us a thumbs up if you don't like it. Don't just drag a thumbs down in there Give me some feedback. Give me some feedback. Maybe you've got some hints of tips and pointers that you Pretty sure I could make it better or You know and yeah, and I'll speak to you soon Bye While you're waiting your hands