 Hello everybody and welcome back to my V-LOG, it's my channel and on the bench today we've got the NAM, or the NAM NAP 140, but this time rather than having the Sankin transistors on there for the output, I've put in a couple of these Toshiba's, ok now these are genuine Toshiba's from Farnell and I've also had to get rid of those two power supplies that I had and the reason why I had to do that was because I noticed that they introduced some noise and let me just show you on the screen quick what I mean by that and here is this little NAM NAP output on the screen here and this is with the Toshiba chips I do believe but it doesn't really matter which one it is I think it's the Toshiba chips but this is the RYGLE output ok and I should have probably showed you the way around first and that's all I did was just move those power leads up to the 10-man or I'm showing you the video in reverse so I did it first in the 10-man and that's the output that we got and I thought oh no this this amplifier is terrible I mean look at it do you and that's no good and just moving those power leads and popping them into the RYGLE there like I say then we get this output I love it the volume first before I just connect it up and that's the output that's just the difference there so because there was that amount of difference I just thought no I did fat around with the power supplies had a little look around see what I could do and then I just thought no you know just definitely why I can still send them back send them back so I've sent them back all right so we get that out of the way now I've decided to just connect up this digital again I'm using a differential input on it and just to see what this is like here because nice thing about this using this audio analyzer suite software is there's we can do THD noise versus the frequency crossing time frequency I can't figure out I can do that yet with ARTA but just to give a bit of a look we can look at this frequency response here and see what this is like now this is 20k I believe that's 30k this is 20k 20 kilohertz and it doesn't look too bad at all if we just compare that with what we get with ARTA the only difference is here is we have a lower noise floor generally within the system it's 32 bit system and we've got a 14 bit oscilloscope doing this but we get to see anyway this does actually match really what you get on the output especially when you're looking at an ARTA look at the now I've done all this already at the same time all right so I just thought this would be the better way and you can see look the noise floor I've put some averages on that so you can see when it's that fundamental going in and there's the 2k harmonics 3 4 5 6 7 and this is pretty much it's quite similar apart from we get to see a lot more of this in ARTA because we get to you know we're a lot lower in actual fact we're down here somewhere around 120 so you already get to see these bits mainly but still it's it's good because it doesn't have to be all about what it shows here on this and we've got the spectrum analyzer now so let's have a look at this now this is always interesting because this is the thd and the noise across the entire frequency from 20 hertz all the way up to 20k so we take a look at here at the peak so you can see up here these numbers here is there is the frequency that we're at and this is the total armament distortion plus the noise so we can look at we look at the peaky parts you see that's 0.07 again 0.07 that was quite a few numbers after this as well which is pretty good for resolution 0.07 this is 0.08 i'm looking at the peaky parts 0.08 0.08 0.07 0.08 and there it goes up a little bit there they top in the frequency but we can also see a little bit of that with the spectrum known up the spectrum analyzer with the frequency response where it goes up a little bit here even though that doesn't quite tie into there but if we drop out onto the thd now look thd 0.03 0.03 0.03 0.03 0.04 0.08 and we've got back up 0.114 that's at 70k so it still looks you know pretty good whether to sheavers but i'm not saying that that's not going to look as well with the sankans because what you got to remember is when i did this i was using then 10 power supplies not the regal i've been using the regal just to test the circuit knowing everything's okay i've built it okay and then i switch over to the 10 uh you know it was like having a pinch in the stomach when i realized what i'd done what what what that was doing i had to actually phone a friend and just have a chat because these things knock me about a little bit when i get to see something like that so i've already done this just to speed things up again or we can see uh this is with the voltage that we got going in 32 volts per side so i can't really expect it to be uh the same as what it would be if it were um at 40 volts which is what they they sort of recommend but i am going to get this fixed meaning that i'm going to be at another power supply very soon at the same as the regal so there we got about 50 watts out of it before we get to 1 percent which is okay that's that eight times we'll do a test in a moment for four ohms we can do that now actually let me just see it's going to be easy enough all i've got to do on this to here to here i'm going to turn the power off very quickly while i do this it's just basically connect up that to there well then you can see that let's just back that off connect up this to here and we have now got a four ohm load right nothing else has to change it's good i'm going to turn the power back on there we still record now i'm turning it forward now and that's good all right and we can just do this again with a four ohm load so we're setting range from one watt to a hundred watts uh we're going to switch out this load here to four ohms not 40 and put the zero there four point zero and actual fights i'll um i'll show you in a different video in a short what happens when you do something wrong in this and i think it was in here i did it wrong and i show you what happens when you do that all right so 50 steps we're going to stop at 1% again because not interested in anything after 1% so let's hit it and i think i'll point you towards the power supply here as well up in the corner well i didn't actually get to see what the power supply did then i was too busy watching the screen to see what it was going to do well this is interesting because this happened a bit in the other one didn't it so i went up a little bit and yeah i can't remember now whether and what part of the video it was that uh because i've done this so many times i lose a bit of track where it was actually going on a higher distortion level and then as i pushed it even more power to the minus 3db the distortion level went down i don't know if this is anything to do with that but that's a bit strange because it was the same as before and that's at 51 watts like that's where it when it goes up 51 watts and it comes down again a bit um we get to get uh what 72 watts out of that yeah that's not bad i suppose it's not as though it was pulling too much current i didn't notice but very much down to it would have been but you remember you'll run this at minus uh plus minus 40 volts um we just got 32 all right so we looked at the frequency response oh quick look at the scope i'm not going to go through all the different bits on the scope i'm just going to go from a low middle to high already done it here 20 hertz that looks pretty respectable you're going to expect a little bit of drop off this is an old old circuit um that's that's that's pretty good when you uh you consider uh the circuit let's go to a thousand oh i don't know what i've put in there some sort of special character and we'll just hit that on a single yeah it's all right with the wrong a bit a bit of noise on there but that's probably just this setup uh now we're going to go to 10 k this is the uh travel and uh well it's the speed of it as well but it's still not too bad really uh we'll get it 20 not bothering anything after 20 not brilliant but not terribly bad and i think it shows a little bit in the frequency response to that as well uh the red that's you know about uh what 15 k there yeah well it starts dropping off and to be honest if you can can you hear anything above 15 k particularly uh that's when i put it too high there's a 20 so that's uh minus 0.2 db against the reference signal going in so it's pretty good all right let's um let's set up for art and check that out so art is set up here now uh the only difference is that i've disconnected this thing i decided that this is probably introduced noise as well you know there's a lot of space between things and those components i use are all cheap ones from china these components on here they're all v-shade the two resistors are v-shade and the two zena diodes are v-shade and it's a lot smaller so you know hopefully that's uh well i actually know it does make a difference so that's the way that is now but apart from that everything else is the same uh let's have a little peek so just turn the volume down i don't want it just kicking in full blast don't wait to set this one too many and we're going to go up the range there so we're down here 160 there you can see look down the noise floor on the other ones here the power's on on the power supply that was at 50 hertz and we got some calm made in here another thing too spectacular though so while that's on let's start turning it up this is what you could see in the frequency response look this is uh our noise coming in here now the interesting thing is when you see this of course you got less of a signal to noise so we get this point 0.05 0.06 as you start going up and turn the signal up and the signal becomes you know a lot higher compared to the noise about 14 dbf uh minus 14 0.15 which is you know pretty good uh we get to 10 and there is something noticeable in a minute you'll see that uh but this is all quite nice you know this is our second uh even harmonic odd even odd even odd even and you could see that a little bit but you couldn't see these um so much in the other spectrum analyzer you can see the top bits more but look what happens here look we're at 0.0128 bfs and watch this here that's 6 at 9.017 we just get a little bit close we've gone in 0.025 and as soon as I get down there to that we're at 0.1 0.2 0.1 and this look the noise the noise floor's gone up let me just take the pressure off the system the noise floor's gone up and we've got all these little um spares coming around each side of uh harmonics there and you know this is all push but this is you're pushing it to full volume you're pushing it to full volume I mean look at the input level here 60 so you're pushing it to full volume you just knock it off just a little time of it and uh that noise floor drops down and we're back into 0.025 and you know we've already missed out on a little bit that is quite a bit of power really but we're using um 0.934 plump so yeah I'd say that's uh that's okay that's okay and let's all look at the um frequency response I know that we've just looked at it on that but it's always nice to look at on this as it's you know it's high a bit uh system so I would just uh kick that in oh there it is it's right on the top concern let me move it no clicky clicky click now that still looks a little bit but look how zoomed in we are so I'm gonna just knock this down very very slightly oh I don't know if I tell them that I put it up I think it's about 59 it works on best I hope 57 is it really dodgy trying to get this down okay I'll put that there all right and then hopefully it's gonna let me bring this down we'll bring this range up we want it to be 3.5 1.5 2.5 3 bring that back up again to 3 so there we have it just like we would have seen it on the other one with plus minus 3 db scale and it doesn't look too bad at all does it this is uh 20 hertz and if we just put this across here I'll put that across there we get to see well I'm gonna go down to that one as it drops onto the one that's 10 hertz and that's like 0.5 yeah 0.5 but at 20 we're talking 0.1 db and across here this way it drops up on the analysed side here we're at 20k pretty much 0.2 1 db so not even a half db and around that 15 0.06 we look at what we are on the 1k just get a bit of reference plus 0.05 db so yeah that's that's pretty good that's pretty good much better looking than what it was but partial of that is down to like I should do for because that was the this setup but using the 10ma power supply and then swapping out into the rigle and you know the difference the contrast there was automatic with me it was like oh my life look at this get rid of the other one get rid of those power supplies uh they're one millivoc apparently um rms ripple and noise on the output but the rigle here is 350 microvolts right at about 0.3 of a millivolt oh it's rms right so that's that with the tissue chips and I will actually redo this I'm not going to do it this week I've got something else I want to show you but um that's what it's like with the tissue ones oh and let me just tell you I've already done this I know what this looks like now and um yeah I can't say it now that you know this is a complete flop because it's not thanks for watching have you got this far and I'll catch you in the next one bye for now guys