 Hello YouTube, so I just wanted to show you that I've built the other channel for this. And I've set both the quiescent current, they're about 45. I know it says about 90 milliamps on each of those, but that's because it's 45 per channel, about 90 milliamps. And it's great to see that it's holding, but then when I set the currents I did set them with the same heatsinks as what they've got on there, and I have to put a good 15-20 minutes fine tuning the pot, just get it. Smack on and now taking off the brighter led, you can see it on the LED. I've taken off the brighter one, but the problem I've got now is that one there is dead on 2 volts across it, which is what I was looking for, and this one's 1.8. But the bright one was 2.6, and it's nice to see now that each channel has only got about 3 milliamps between them, so when it's just one channel on the power supply, between the positive voltage and the negative voltage, there's only a couple of milliamp difference between them, and that's on both channels. So that's great. The downside to this amplifier, I found the downside, and it's of no fault with this amplifier. This is a cracking little amplifier, I would say to anybody out there that's considering building yourself something a little bit more round, a little bit more, but not terribly complicated, but a little bit more complicated, you know, than that little half watt one that I did a few weeks ago, that was a few videos ago. I mean that's a nice little one, that works okay in there. The LM1875, yeah that's pretty good too, but obviously between the three of them, or I say obviously between that one, the little one and this one, of course this one's better, and in my opinion between the LM1875 and this one, this one is better, and I'll tell you for one of the reasons why I say it's better. Here's one, well the main reason is that there's a notifiable difference now, in between, it's like I want to play some things that I've been playing previously on that little amp and on this, and they sound okay, but now because I've been playing CDs and I can hear what this sounds like when you put CD through it, and I'm listening to the things that I normally listen to, it sounds all a little bit empty. So that's the downside to this amp, it shows up the quality of the audio that you've got, and unfortunately all this MP3 stuff now really seems to be quite bland in comparison to the CD. The difference is I can't actually play you anything from CD because it's all copyright, and of course there won't be very happy with it at all, it was sort of a blank video, but you won't be able to hear anything, so I'll be told to take it down. So I have done some, I thought I could try and trick a little medley on some stuff I was listening to last night because I was listening to this about five hours yesterday, and that's when I realised the LEDs and I did the voltage checks, and like I said, that one there is the second channel that I did, you can see that it's got black sort of brown, it's pretty much the only way to tell them apart unless you, I can see there's an angled resistor at the back there, and I think it's not supposed to be angled, it's supposed to be uniform like the rest of the circuit, oh it's great, it's been such a difficult time trying to put this video together because of the difference with the music, and I've actually pulled myself to do it because I've put myself on the spot by putting my dinner in. Yes, hold again, just trick that for a moment. Okay, so a lot, I've got a track here, I'm just going to, I don't know what volume this is on, certainly just, I've got to do it two hands, and I can't hold this and do that at the same time. Well, as I just looked at it, it's only on number 10, I'm just going to put that to number 20. So you can see how much the current is moving, it's not doing anything, I was running this with CDs in it, yes the volume 30 on this, it goes up to 100, so it's pretty good as an output, I think it's like full line level, maybe even a little bit of over volume, I don't know, but I was using net number 30, and it is cracking, it does sound really nice, and the heat sinks, not really getting worn, there's no point in doing a heat test on them because it's like, it's off cold, it's slightly warm, you can feel there's a bit of warmth through there, but they don't really get any hotter. To get this to sort of move up to around about like 200 milliamps, you've really got to push this, you've got to, you've got to give it some, but my god, it does get loud. My cone on there is knackered, so I can't even put anything with lots of bass, but this, I don't know, I'm going to turn it up a bit more, it's found a way of resting here for a second, so put this back on, see you get to, I'm going to turn it down again to 20. It's quite a bit of trying to do this because I don't have any real operates, I've got a, I've got a phone holder that you'd stick to a window inside a car, stuck onto the top of a lens out of one of these like inspection lamps, like my LED lamp on my bench here, so the wobbles and wobbles all over the place, so this is not a bad track actually just to have a little listen to, I'm going to turn it up again with this because we're still in number 12. The VLC media player, or my computer. I'm just going to find a different track and just sort of play it out with this, because there's, you can really sort of tell you about this, it's amplified apart from all the parts on it, pretty cheap. There are a few of them off eBay. I would reckon that the cost for each channel is probably, let's say a five for each channel, and it does like the heat sinks in that, just like scrap from old power supplies. Yeah, say a five for each channel. I don't think that's a lot for a nice little project, especially as it works, and I think that's the thing when you, like me, I've built quite a lot of circuits now, I've got a channel on the internet and, you know, there's some I get to work, some I don't, but the ones I get to work you see, the ones I don't, you don't really just, I just tend to point wasting your time, or mine by having videos just full of fails. So, but I do realise that, you know, failing is all part of the learning thing, which is pretty good. I made a mistake when I was building this one. And this time it wasn't the resistor. It was this, down here you've got two capacitors here, in series with each other. And the connection for the 10R resistor, which is through the back there, should be able to see, can I zoom in like that? Yeah, so a little 10R resistor back there. The connection from that should be in the middle. So the two legs connect on these two film resistors, capacitors down there. It shouldn't be connected there, and it was connected there, and it should be connected to the furthest, furthest left leg of the film capacitor that I left. So I was getting, I was getting over heating problems, I was getting, you know, it was heating up quite badly. Not good at all, not good at all. So when I sort of figured out that it was that, it was simple enough. And it was great because, you know, I had to go over all my connections, and just keep going over all the connections, and keep going over the connections, and surprising how much you actually got to keep in your mind while you're doing that. So it's good for your memory. Good exercise for the memory. I wish I'd noticed what time I put my dinner in the oven, and I didn't. That's not really good. They're in pain. So as you can see, look back to settle, and they're both on 90 milliamps again, or they're about, so it's, what are you gonna, a little bit of change, but that's okay. We're not quite on 200 volts going in there, I know you can see down there, because I'm trying to keep it like 25 volts on each, on each channel. Just for now, it'll be okay for the 35 volts, but I'm not gonna need to set up for that. I can see the needle all the way across there. Yeah, so I'm quite chuffed with this. I'm gonna find a song there, just to play out with. That was filming a riff. Not this one so much. This is quite good actually. I'm gonna tell you now, I'm only gonna let it go to number 30. I probably won't actually. I'll probably go on 26, because I think 30 is a bit loud. That's 20. It's a pity actually that you can, actually, this one sounds quite nice. 24. I'm gonna put on 24. It's a pity that that right speaker is right on as much as it is, but... It's terrible, isn't it? You can hear that rattling away like mad. It's almost covering up the rest of that tune, so I'm gonna... 22. So I've turned it down to 20 just to try and get rid of it. Right, put some more. There's a split. That's gonna be it. It's gone though. So I'm just gonna glue that. I know the top looks a bit hideous, but to be honest with you, it does the job. It's a bit natural. I was playing this last night, maybe. I was playing that, maybe that's another terrible thing about having MP3s, because they're all at different volume levels. So you can listen to something that you gotta turn up, because it's relative, not too quiet, but it's... And then something else comes on, which is a lot louder. Does my head in a bit, but I suppose it's all freebie, so shouldn't complain. But there we go. There we go. Channels, two channels, stereo. It is very, very nice. It's got more sort of meat and veg to it than what that has, and certainly more than what that one has. I would say to anybody, if you're looking at the circuit, thinking if I build it, would it work? Yeah, it will. Straight up the box. Just use the components that it tells you to. And all of them are dead easy to get. And even like I said, these pairs of these, now, the second one I did, they weren't the basses. These ones were pretty close. I remember there were more being pretty damn close, and that was good, because I had the choice that I had. Slim down the choice to what I got left. These ones, the basses, they were the closest of what was left. I think my neighbor downstairs must be listening to some bassy music, because I can feel it going through my foot. It was just cool. I've been doing the same thing. Yeah, yeah, what was I saying? Now, these ones, yeah, they've got a bit more of a gap in the beta values. I can't remember exactly what it was. It doesn't really matter. It's just a bigger gap. But it doesn't really make any difference. It doesn't seem to make a blind bit of difference than numbers being terribly, terribly close. Maybe it will at higher volumes. I don't know. I don't know. I made a modification to my power supply as well. So I'm coming in directly off this now. Of course that's going through this variable transformer, so I can turn the AC up and down. Going into those 6 amp diodes, underneath there is a X2 suppression capacitor, suppressing the noise off the AC. And then I got me 10 millifarads here. There were another couple of 10 millifarads there, but I was getting into a lore of diminishing. I don't think I hate it when your mind goes blank. Diminishing returns. But I'm okay with 15 millifarad. That's plenty for this. I'm not quite well aware of that. I can't let these touch if I do game over. So that's the little power supply for this. And I didn't want to be building it into a unit with this because I want to keep this separate. I want to keep it separate. But as a power supply for these, because I am going to box these up, I've just been trying to think how I can do it. Now if anyone can answer me this, you know you see all the metal can screens going around amplifiers and stuff being grounded. Can I do the same thing with mesh? Fine knit mesh. So you can still see through it. A bit still have it screened because that mesh can be grounded. Just curious. I think you could probably do it, but I'm wondering if there's anybody that could tell me oh no that's a no no. Because that means I can do it in such a way that I could actually see. You know, I think I like the way I set it out. It's like a bit of an art, isn't it, with electronics. Setting it out nice now and now. It's not as good as what other people do. They could probably do it a lot smaller onto a smaller space. But for me, I think this is pretty good. So there we go. That's it. I'm going to see if I can find a chain that I can do. Sorry about that. Oh, that sounded lovely to be all right. I was going to be a full one up in there. Like this. And of course this one's loud, doing your do's as well. So I'm letting it adjust the volume.