 Hello everybody and welcome back to my V-LOG, my channel. Today we've got a kit to build, it's another amplifier kit. This one is based on the TDA 7294. There's a board here, that's quite nice, that's where the left and right channel of the TDA ICs will go. That's quite nice, nice and simple, that's definite. I'll elevate a little to it as you've split it down the middle for a left-hand side and a right-hand side when the channel is there. The back side is nice, not the yoddy up. We've got some Nichicon, yep, a 63V for 70mph. Nichicon, they're all these little things. Oh, they're Rubicon. Nice, I don't know if you can see that, but it does say Rubicon on it. There's an Elmer, that's nice again. It looks like they're doing some straightening up on those, nice and carefully. I don't know whether these will be genuine or not. I just don't want to say anything. Again, a bit of tidying up is going to need to be done on these. Look, it was nice and weighty. We've got some coils here that have been at least in nice condition anyway. That's nice. We've got a couple of those. Then we've got these other capacitors here, which are Bevinby, Bevinby, I don't know for sure about those, but they look nice, don't they? Axial, as fast as these leads are nice and tall. They look quite nice. Some 1% resistors, and I expect these will all be Rubicon. If the others were, that's the other Elmer. Yeah, Rubicon, I expect them all to be the same, these metallized film resistors and some film capacitor, film capacitor. These are all going to be the same value then. So we haven't got a lot of values to go through. All right, we're going to stick it all together. What I'm going to do is I'm going to do it off camera, because it doesn't seem to have a lot of point doing it on camera. That's what you get in the box, and these connector blocks here. What is that? Oh, I see, as I can go in together. One, two, three, four, five. Okay, so you can fit together, but then you can do that. I'll have to faff around. Lovely, lovely, lovely. That is nice actually when they do that. So those blue ones, when you get little edges on them, and then you're going to snip it all off and cut it all off. That's quite nice. Good, good connector areas there. All right, let's put it together, and then we can give it a bit of a test. I've just noticed, well, I'll just put it in the resistors here, and there's 4148, they're diodes, and we don't have any diodes in the kit. I'm looking through the kit here, and I can't see any diodes. I've got a few more resistors to go, and this is all that there was in the kit. The bag is empty. I don't know. No, so there's just no diodes in there, but you need a couple of 4148s there. Okay, I have some anyway, so that's not going to be such a big problem for me. But if you are buying these kits, maybe it's a good say to the seller or something, can you check that there's some diodes in there? If you don't have any, because it might stymie, you're completing it. Okay, so I've got this connected up, built up and connected up. You know, reasonably easy enough to do, to find those diodes, but they're in there. Give me a slight point, there's a bit of diodes in here, and there's one across here. We've got our input, input, and we've got our output. This in the middle here, one side, and the one side here is for the voltage in and the ground, and then we've also got our output, left channel, ground, output, right channel, and ground. Connected up our 200 watt dummy loads, and I'm going to be putting in a, says you can go, I think it's 12 volt, 15 volt, 18 volts, 24 volt, 28 volt. So I've gone for the middle one plus minus 18 volts, that's what we're going to be having over here, and we're going to power it up. I'm just going to pop it into power. Now it does stay on the, on the data sheet. There's not a 50, 65 milliamp quiescent current. And if we just go over here and take a peak there, and we can see that, that isn't quite the same as what it says on the data sheet. And now we're going to take a peak at the signal. We're going to use the waveforms software. So here we are with the waveforms software on the screen, and we are now going to put our voltage down there. We've got a maximum of five volts. We're going to be set at one kilo hertz. And we've got both channels on the go. So we can see left and right, one millisecond per division on the base for the cross here. And we're going to start our input. So we're just going to pop that in and start climbing and see what we got. Okay, well that's not very good. We're clipping from the bottom straight away. We're only at one volt per division. One volt per division here. So we've got one, two, three, four. And that shows here on the peak to peak, 1.49. Well that's not very good. And over here it doesn't look particularly very nice anyway. Just check these settings. And then one times on my scopes, aren't I? On my probes, yep. Absolutely. Over there, about five watts of power. That's a little bit okay. And now we've just got one side, the same power, one side sort of dropped out. Just a bit. He's having a bit of a hard time there. Yep, oh no, it's caught up again. Now we just back it off altogether. Start going up again. Okay. Let's say about there. So we've got 1.4. That's not right. There is something definitely not correct about that. And you can just see from the FFT down the bottom. But this is not a very happy device at all. So I'm just going to leave that, well I want to try and get rid of that mess from inside the FFT if I can. Yeah, so look, there's obviously an issue here. It's not on the board because everything is self-explanatory and if you get one wrong, you're going to have something else not in the correct place and everything's gone in correctly. So I'm not sure what's going on there. Things seem to be working. This seems to be clean enough. We're just not getting the output. So I've got a funny food and maybe those ICs are not correct. It's just not correct at all. But hey, it was an experiment. It was just to see what it'd be like and what I'll do is the 15 pins, not the easiest to be pulling them out but doable. I'll get a couple of other ICs and just put them in and see what happens from there. But as far as it goes for this one, this is it. That's the output. I'm not even going to bother getting into using the other audio analyzer because we can see from there that it's just not doing what it's supposed to do. All right, well not really the output I wanted. But hey, that's how things go sometimes. That's how things go. So that's it for this video. Sorry it's not better than that guys and I'll try and get back as soon as I can with some different ICs in there and see if that makes any difference. Okay, catching the next one. Bye for now.