 Hello everybody and welcome back to my channel. It's the early hours of the morning as my black and white cat Felix Just wouldn't leave me alone. He's gone out now and so I'm up One and a half cup to coffee in and I've set out our components for this build for this 6200 watt Hi-fi power amplifier I'm pretty much going to go along with that these rule in the right place, but I've got my My meter set up here ready just to check it out Now the reason why this has taken a bit of time because I was waiting for these boards to come in these are thicker boards And the ones that I was using I used the first time around I mean that reason they're good boards for prototyping, but This is a much much better Much more rigid Think about it. So that's what I've been waiting for That's all right, let's get to it then so Remind us all what this is. This is a lovely little amplifier circuit. We're going to build In the same flow as it's laid out So first thing I'm going to do is come in with is our 4.7 micro farad Capacitor and showing that we get the clarity the right way around. We're going to be connecting to the positive side of this We're going to start off right in the middle here literally just folding that Down that way because from there we're going to go into a 1k Resist that Gonna get that in pretty close. It means here And that's actually acting as part of a voltage divider With this Another 1k resistor The nice thing about doing this is you don't have to rush it. You just take your time 22k resistor And now we're going into Gonna get that without knocking the rest out all over the place Near a pair of tweezers. There's always a pair of tweezers up here, are they? Wrong. Swallow tweezers, I'll do mm-hmm Yeah, because now we're going into a bit of a need to reduce the current using the 22k to our little All I'm doing is I'm just pressing them through at the moment. I'm not even trying to You know do anything with the underneath we'll look at that in a moment I'm just gonna put your components on there first. I want 100 puff And that's going to bridge across the 22k The basic stick that in the same place Whether a lot of this will get to the cut or not, I don't know and now we want to another 22k Because this is going to be What limits the current into our LED move forward like I say I mean you can basically do this Exactly the same way as what it is on the schematic I'm just gonna move in this forward Same sort of way. You might be able to see that that is pretty much the same as this bit here We've done this bit here so far So now we're gonna get ready to go for the diode And then going to our current sink and our differential pair Okay, so we'll get the diode on because the diode is going to get underground Now we want to make sure we get this drawing around So if you look inside it, you can see where the big chunk of metal is That's what we always know The big chunk of metal And just to Confirm that it works I think I can do that at this meter Rather than put it in soldering and find out it's got a problem We just confirm that it works to start off with you should see a little bit of Glow coming out of this There we go I don't know if you just saw that Yeah The glow coming out and of course doing that. We also get to see that Which way the other than cathode is fish for certain Bring them a bit closer and sit like that all this leg out Putting on this leg just to bring it across because this is what we're gonna be running now negative path down there Mine is 35 round. All right. Well, I have to say now we've got those in like that. I can turn this over Just gonna turn this over and look at what we've got. It all seems a bit high What we don't want to do of course is snip anything that shouldn't be snipped See this has got to be connected to this So we can come in here just these are going to be snipped into each other This is the input Capacitor now that in actual fact wants to be bent back up and come through here possibly This can be snipped here This is the input capacitor. This is the first one. Okay, I Can be snipped to there. This is our This is our hundred puff because you got to remember what we're doing here Who's using these leads? As our tracks, it's gonna be snipped to these two hundred keys to be our voltage divider 22k there wants to be one case. This just wants to be Snipped here. I'm gonna just be snipped Just enough that it leaves Enough there to be soldered on to And all these are connected to each other how they're supposed to be and we don't need so much on that That's the hundred puff. Now that there that there is ready for soldering Should we go in a bit closer? Sorry about the wobble. It's just the way this is set up Yeah, so this here now is ready for the first Bit of soldering looks pleasant enough. It's tidy enough So let's get that done. Shall we have a bit of coffee? I need it again Maybe you just check out the PMP and PN of the transistors because I Forgot what they are already So don't want to go into my feet or the cat's paws Really, I should put the extractor on Doing this this close here, but I think just for this little bit Besides it's so quiet be a pity to just doing a double check to make sure everything It's supposed to be Yes, it is I'm not gonna solder this part here. So I need some Moveability on there. That's it. You don't have to do like big long trucks or anything on this It's just and of course there's on here. Anyway, the pads there are ready to be soldered. So It's soldering it to the pad at the same time. I'm just moving this for neatness. I don't need to move it really. I'm just Been a bit fuddy-duddy Okay, let's hold it up there. Just yeah, just because we've got the base of our transistors to go on here first So I might put the base in there and soldered a lot together. What I would do is just Cut that down and the same with this one. This is the 1k Not again is going on to the base of a transistor to the B546 So just leave that like that. I'm gonna stick the transistors in now They're both the B546's So these little things Quick check on base emitter collector by a sculpture emitter. I expected to go something like PC Yeah, I don't know. I always have to do this in the right order. It really doesn't matter. It's just the easier when you Count them one two three So they are so this is an MPN and We have the middle one is the base We have three is the emitter Makes number one has to be the collector So we want this to be facing me We're gonna pull this base out sliding like this And we're gonna want the junction of the 22k and the LED I'm gonna put that in and to the work you can just play those legs out of half and now we also want We just want the same going on with This 1k this one I think just keep I just make sure there's enough space Keep things looking the same We can put that in like that and again just splay these underneath a little tiny bit What we may need to make sure is that the collector of this one connects to the emitter of this one so this will be our collector our emitter emitter and on this side here is going to be our collector So these two need to be across each other need to Clip those because that's going to make a nice Nice connection themselves These bases All I want to do is just make sure that they still look pretty stood up nice And they look pretty wants to be down there that wants to be down there very conscious about bits of metal Flipped across the place because like I say the cats and then it pours Beautiful Very quick bit of soda here Going on to this diode, okay So there we have these two in place look and see we've got a Coming off this collector we've got a 560 Resistor and that's going to take us all the way to the positive 35 volts Now it doesn't matter whether these tracks run closer at this time Because before I went out all the way out to the edge, but it doesn't really matter because I'll just run positive and negative rails down here I just want to make sure everything fits nicely Because it's going to get quite complicated as we get further down But a funny thing everything should be okay. I might just get one further down here It's not going to hurt. Now we can just open the solder That's in place and on the other side here We want the 560 Coming from the emitter of this going to the negative side power The other side over there plus those two over. This is only one perforation between them Okay So let's just tag that This way really does help when you've got a soldering iron that doesn't get too hot You know, it holds its temperature well All right now Now the ideal way of putting this on the transistor in Is so that Is that these two are actually connected together tied together So they keep the same temperature But that's not as easy to do Or is it This is my emitter So now I want to turn this the other way around Because So what this has got to do is what this has got to connect on to the collector side of this The emitter of this has got to go to the collector side of this So I'm going to do this as close as I can See if it's possible to Leave that in such a way that it can't be strapped together So this is the one we're looking for So that this will connect to the emitter side here Which is underneath What we'll do to make sure that works As well just like this I'm gonna tack that down like that and for that other side For this side, we're gonna be going straight to ground and our base is going to come out to a 22k and these here can be tied together This I'm going to take up at an angle and then just bend it So it actually goes down to ground this way. Okay I'm just going to nip off the end of that Don't need that and then tap that there for now because for me it's About neatness as well It's got to look nice underneath even if it just looks like dots of solder connected. That doesn't matter as long as it looks nice Okay, so now this one's This one's a path to ground and this is where sometimes saving Some of these things comes in handy Because I can Just solder that down to there And I've got myself without just having to solder, solder, solder. I've got myself a nice A nice path. Get rid of that. I can't stay in I can't even bang a clarin around It wakes me up every morning. This bird is getting worse like this morning He just keeps sticking his face in the morning It's very, I can't much just shove him off me. It's not fair, you know I just haven't got the heart to do it But yeah, you can be a right pain in the back so I'd lie down And eventually because I've woken up then I just think I'm gonna get up So I'm just gonna Put this on here now and just get one on to there I will go across the rest of that but I'll do that later on in the day when I can put the fan on I'm just just tacking. I don't want too much solder fumes going into my brain Probably, you know, messed it up enough already Okay, right, so this is our 520 going here. This is our 520 going here 560, sorry, resistors and this is our That's still for the That is still for the LED. Now that can connect That can go or this can come down here now And go on to the end of our LED. How's that going to look neatest? That goes on to the end of the LED And we just just tap that there Still got to run because I'll run copper wire Down the actual power rails I'll run copper wire. I'll use the same copper wire Here's what I'm gonna be using for The ground you start ground Just means that we're gonna pull all the grounds together Change them to just like that Which is all right for now Just get some Get some that's that way. So this is our base now. We're gonna come down into a 1k. Oh That's We can use a little tiny cable tie around these just to Keep them together Okay It's looking okay so far Hope you can see that so I don't know if you can can't see the computer can you? So yes, we're gonna go into a 22k, so we got a We got a 1k coming off this base here and Then we're gonna go on to a hundred micro farad capacitor, which is gonna go to ground It's not going to the negative. It's going to the zero part of the ground. So we'll have to But our hole in there. So when it comes time to put the cables in for the ground is probably about four or five of them We can just fit it in straight into that. But first of all, let's do our 1k Now I think this time around I am gonna check this is one of the capacitors we need I'm gonna check this is a 1k Just because my eyes are as good as what they should be or could be your 1001 ohms about it 1k 543 In the morning, that's what time it is So I'll do this for another hour now. I'll take a break So this 1k is coming off the base of our transistor We can put that Through there and you know, do we again, you know, I'm just trying to go for neatness because I don't know because I like sitting looking at these things And then we're gonna go into the negative side the striped side of Capacitor, I'll just give that a little more space. I just fold that across there and just put that there for now Which are 1k coming to that this off here But I think I'll keep all of this nice chunky bit of Lead also doing with that That's the 1k and that 1k is gonna go on to our 22k 22k is the reason to identify because they're little tiny things and that is gonna run down All the way down to our output. So That's gonna run all the way down here Running all the way down to the output now for the zero not for the negative but for the zero So I can now clip that off there that off there. I'll leave this side of the 1k just check Okay now because it stops at about 22 That can come off together and just be tapped up. This is going off to our negative 35 It's going up to our positive 35 and this is zero We're getting there. We're getting there starting to take shape Starting to take shape I think I've got a bit of relief on that Just have that like. Okay, okay, right. No, we're gonna be going into this making a hole I'm putting the cable to this because this is going to zero this is going to ground which is going to be from the center part of the subject positive 35 volts Artificial ground zero and then negative 35 volts and we're going to get going to the zero with this Not to the out But to the zero this 22k into the out output now. We are now gonna set up another voltage divider and pot 2k pot this is where it can get a little bit complicated, but it's not really that complicated But it is a little bit so we'll do the voltage divider part. So we've got two 3.3k I'm just gonna check it just to make sure it's a bit not about a bit 3.3 like a 3k expect to see 3300 there. It's supposed to be 3k 3 We just put that one side for a moment. They do say 0.5 watts on these as well All right, that's for one percenters That is more like 3k It's supposed to be 3.3k and they did come out of 3.3 Well, maybe it's because I'm using that let's use this one. It's a bit more accurate 3.2 8 about it. We're good Hello trouble 22k 1 3.3k in there And we want to put another 3.3k Pretty sure that's the one I showed up there. Just check it. We have the meter 3.284 And then this is going to go down to a negative 35 We do need a couple of connections in the meantime, so really I Want a connection here this way it gets a bit complicated as much and then take that Really, I need to be able to make a connection on the other side as well so if I put this here Because I need to be able to make a connection here as well with the base of one of the driving transistors And I need to be able to make a connection in the middle. So I'm going to put this one Here and then this one's going to get to the negative round these two across each other Like that, but keeping in mind that there's going to be something Going in between these two which is not based to the driver transistor Sorry, not the driver transistor. We're going to have a hundred micro farads We're going to have a hundred micro farads and that is going to be going to our output line from this 22k from here to here We're just going to make sure that the positive side goes on to our those 100 micro farads here So we want the positive sides on our 22k and the negative side It's going to go here So just make sure it's got a bit of space so you can be sat on there Nicely, it's going to make this the same shape Just because that Neatness thing what you do not there pussy get space for everything right? I'm going to do it a bit closer because I'm worried about space those leads a bit now that is Going to be connecting across Divide it there And this one of course, it's just going to be part of the track Yes, we turn them over Tight it together before we Tack it down Beautiful push that in when I'm attacking it 3k Here needs to be able to come across the top of this see these need to be joined together But this doesn't want to be touching this We're going to root it around Because we don't want that touching What needs to connect it so yes, we want these two connected But we don't want that it looks a bit weird doing it like this That's how we're going to do it. We're going to attack that there attack that there Let's just Leave it like that, but this needs to be rooted around We can't really just go over in case it gets pushed down, but we can tack it tack it tack it and Tack it there That'd be okay Okay, let me just make sure I'm doing that right Make doubly sure At this stage now we need our pot. It's the kind of same line as this Believe I can put that in about there I've got a 1k to go in Let's just get this pot sorted out. No need to go into the first Part of this pot not the wipe and not the middle bit With this just make sure that I'm there and it's not going to be in any way Gonna be touching that so Let's just push that down there Just get that tapped. He is walking through the box of my airplane I'm like Found out really that there's hardly any insulation between the floor here and the one downstairs so Whenever he's running around and jumping around Makes a right racket downstairs That's not really found a lady downstairs, but this is what he does to me all through the night Everybody know what can you do? I Can't pin him down pin him down right so now we want another BC Well This is a weird bit for me Because I need to put a 1k on the other side of that from the image Screen just Data sheets so as you can see here look This is this is where we are We're here. We've done this bit. I'm just doing this bit here and then we'll bring this bit in here with the driver but So from on one side of this pot We're going to connect for the emitter on the other side We're connecting to the base and this Divider here the 1k in the 2k. It's just weird. Isn't it the way it makes it look like? You got the three connections there to going to the the base when really It's not But it is Anyway, give me two confused last time. I don't know what's gonna be more confused now Yeah, that'd be better if I put that there. We're just gonna see that Bella Because I've got the one over here. You can't really see that talking. Yeah, it's not really worth it trying to do that I Just use your point out bits, I suppose Right, yeah So coming off and it's going to be going to the base of the other ones I'm going to actually bend that the other way Let's see about that Another transistor the last of the small signal. So if I remember correctly It's always best to tell you what you know check double check triple check if you need to rather than Make a mistake and then try and rectify it once it's been soldered And you're better off just spending a few seconds extra doing it like this Client two three Connect to base emitter Let's throw it around So I want that going on to the 3.3k That going to the 1k And the wiper This is where the 3.3 We're not going to touch that 22 It's going to go across the top of there to here It's our 3.3 And so I believe That's the 3.3 going across there. I can just put this in here in the base. We'll go to the wiper pretty tight Now I'm hoping because I can't get it really centralized Because of the whole situation Let's just see how that comes out because I've got to get that middle one To here and I've got to get this one to here Can that be done a bit better? That can actually I can try and get it in the one next to it, which I believe will be Onto there That when it does to there And the collector part wants to go Right now I'm tap these on and I'm going to take a break Let's down here try and build a bridge Across there with the solder not proving to be It's easy so what I might do oh there we go I've done it There we go Yeah, that's good. That is good. So with that I'm going to take a break now And just tend the end of my soldering on I'm going to stand outside for a few minutes get some fresh air and clean my mind