Great channel , thanks for taking the time , some videos on LED's would be all good with me ,especially ideas etc on led's triggered by music . thx man
Subscribed right now and I wonder why I didn't find your great channel before and I enjoy audio technologies like other addicted people to it. First I would like to thank you for what you're doing and I suggest you put new light source for making videos bcuz shadows are very strong and with just more and right your video quality will be much much better. Thanks again and let's enjoy your channel
"LEDs - showing audio functions for decades" Also replacing hard to find incandescent bulbs more and more. Plus they have been used in the studio and other other creation gear for years. Let's face it, Audio and lighting have been linked for over 100 years, and since LEDs have been around (prolifically) since the 70's, that's about half that time. But who am I to say? :) Thanks for the vid, John. My best to you.
So I salvaged my components, but not my IC. I built a new circuit, making sure to be careful. THAT SUCKER GOT HOT FAST. I think I might have got some bad chips (counterfeit) OR I have some bad GOODWILL power supplies? Can wallwarts have some kind of thermal runaway where they just start pumping out extra power? John? What do you think? Edit: My heatsink is not very good.
Yeah those banana plugs... I got caught too. A drop of solder to properly connect those "clamps" and to stop them spinning around sorts them out though.
The high frequency roll-off is not caused by the output capacitor but mainly by your input low pass filter. For which frequencies do you design your input low pass filters? You have used 2.2 kOhm and 0.1 µF? Is this correct?
John, the data sheet on the TPA1517 shows a 10K resistor between Vcc and the mute/standby pin when that function is not being used. I'm a little confused. Would it be better for me to make sure that pin is high by just tying pins 7 and 8 together, esp. if I'm unsure of the strength of my power supply. I'm using a 12v wallwart and am not sure how many amps it is able to deliver. It says two amps? Bottom line is my circuit is not working.
The 10K resistor is a pull up resistor for when using other circuity to control the mute/standby function. If you're not using that, just tie that pin directly to Vcc. Also be sure the power ground and signal ground pins are tied together, or the chip may be damaged when you power it up. 12v 2amp is adequate for this amp.
Off the top of your head, have you ever had an amplifier that showed no to little 3rd or any harmonics? The way that it's looking to me is that the harmonics are the amplifier adding it's own flavour to the music! I don't a problem with this but it would be an interesting experiment comparing the sound of an amplifier with little to no extra harmonics to something with strong 3rd and something with strong 2nd harmonics to hear what sounded better! I have always believed that an amplifier always adds something to the music, so much for audiophiles chasing the most pure sound LoL but I have never considered all the extra harmonics that amplifiers put into the music which is probably why some amplifiers just sound better than others! It's not like most people think, oh! Elna capacitors sound better than Panasonic capacitors... Yeah I don't know, this was just a thought...
I'd have to do an A/B test sometime. Unless the amplifier has lots of a 2nd or 3rd harmonic (several percent). I struggle to hear anything in normal listening.
@@JohnAudioTech harmonics are an interesting phenomenon, with just two frequencies, a third or more show up out of nowhere... Isn't that how we were created LoL, frequency mum and frequency dad playing together and we mysteriously show up LoL. We are their third harmonic!
You have obviously not experienced true high fidelity. I designed built a few very high fidelity sound systems. Seven channel, four band split spectrum. I am no amateur.
I wouldn't mind some JohnLedTech
Hi John, feel free to talk other topics such as LED, never mind to the people, it's your channel.
I'm a class AB guy too! Looks like a good chip for 1.5 W
I hope you are doing well, John. Thanks for the new video.
Cool little amp, thanks for presenting it.
You are class AB(Actually Best) Guy ❤️❤️❤️
I've populated a Creative Vibra128 PCI sound card with such an IC. They had the pcb without the amplifier. It worked great back then (2002 or 2003).
I'm just getting into audio and electronics, so this was both informative and enjoyable. Thank-you!
Well, then READ the manufacturer DATA SHEET. IF you get confused, then read it another ten times. You will figure it out.
Nice work John !
Great vid as usual. nothing wrong with an LED vid 👍
Great channel , thanks for taking the time , some videos on LED's would be all good with me ,especially ideas etc on led's triggered by music . thx man
Subscribed right now and I wonder why I didn't find your great channel before and I enjoy audio technologies like other addicted people to it.
First I would like to thank you for what you're doing and I suggest you put new light source for making videos bcuz shadows are very strong and with just more and right your video quality will be much much better.
Thanks again and let's enjoy your channel
Velleman sells the TDA1517 in soldering kit form!
Try it with Panasonic NHG electrolytic caps, sounds amazing.
"LEDs - showing audio functions for decades"
Also replacing hard to find incandescent bulbs more and more.
Plus they have been used in the studio and other other creation gear for years.
Let's face it, Audio and lighting have been linked for over 100 years, and since LEDs have been around (prolifically) since the 70's, that's about half that time.
But who am I to say? :)
Thanks for the vid, John. My best to you.
I'm getting the same FEEL tech generator soon :D
Oh those sweet sounds of Bang 🎶🤗🎶 Hey I have a WHOLE BUNCH of TA8251AH stereo amplifier ICs ... ever use those?
So I salvaged my components, but not my IC. I built a new circuit, making sure to be careful. THAT SUCKER GOT HOT FAST. I think I might have got some bad chips (counterfeit) OR I have some bad GOODWILL power supplies? Can wallwarts have some kind of thermal runaway where they just start pumping out extra power? John? What do you think?
Edit: My heatsink is not very good.
Yeah those banana plugs... I got caught too.
A drop of solder to properly connect those "clamps" and to stop them spinning around sorts them out though.
The high frequency roll-off is not caused by the output capacitor but mainly by your input low pass filter. For which frequencies do you design your input low pass filters? You have used 2.2 kOhm and 0.1 µF? Is this correct?
John, the data sheet on the TPA1517 shows a 10K resistor between Vcc and the mute/standby pin when that function is not being used. I'm a little confused. Would it be better for me to make sure that pin is high by just tying pins 7 and 8 together, esp. if I'm unsure of the strength of my power supply. I'm using a 12v wallwart and am not sure how many amps it is able to deliver. It says two amps? Bottom line is my circuit is not working.
The 10K resistor is a pull up resistor for when using other circuity to control the mute/standby function. If you're not using that, just tie that pin directly to Vcc. Also be sure the power ground and signal ground pins are tied together, or the chip may be damaged when you power it up. 12v 2amp is adequate for this amp.
Спасибо! 👍👍👍
Hey man, I'd be glad to know your test & opinion on most ANY device :)
Need to put that resistor bank in mineral oil. Perhaps that's your plan.
Yeah, I thought that with that choice of housing, the original builder might have had immersion in mind.
How much do you guys think that load will be able to dissipate then?
Reminds me of the "cantenna" the hams used to test RF power amps with.
@@JohnAudioTech I've been a HAM for many years, it's what came to mind.
@@Dazzwidd The oil cools the resistors. Obviously, the oil gets warm in the long run.
Off the top of your head, have you ever had an amplifier that showed no to little 3rd or any harmonics?
The way that it's looking to me is that the harmonics are the amplifier adding it's own flavour to the music! I don't a problem with this but it would be an interesting experiment comparing the sound of an amplifier with little to no extra harmonics to something with strong 3rd and something with strong 2nd harmonics to hear what sounded better!
I have always believed that an amplifier always adds something to the music, so much for audiophiles chasing the most pure sound LoL but I have never considered all the extra harmonics that amplifiers put into the music which is probably why some amplifiers just sound better than others! It's not like most people think, oh! Elna capacitors sound better than Panasonic capacitors...
Yeah I don't know, this was just a thought...
I'd have to do an A/B test sometime. Unless the amplifier has lots of a 2nd or 3rd harmonic (several percent). I struggle to hear anything in normal listening.
@@JohnAudioTech harmonics are an interesting phenomenon, with just two frequencies, a third or more show up out of nowhere... Isn't that how we were created LoL, frequency mum and frequency dad playing together and we mysteriously show up LoL. We are their third harmonic!
You have obviously not experienced true high fidelity.
I designed built a few very high fidelity sound systems. Seven channel, four band split spectrum. I am no amateur.
At 00:43 you say "want more power". WHAT!? An LM386-4 can only put out 1Watt. I'm guessing you meant LM3886.
I said these (TDA1517) are a good choice if you want something with more power than an LM386 or the other 1 or 2 watt chips.
@@JohnAudioTech I actually heard that too. I like your skill when it comes to audio amplifier
How about the schematic diagram ?
Ezergoode, Ezergoode, LED's are good.
John, I would send you a couple of these chips (the other ones TPA1517) if you wanted, my cost, but YOU CAN'T GET MAIL?
Don't your think gonna be a good idea to find another cat to fill the terrible emptyness while missing sneakers?
I want to get another cat at some point. I have a few other things to deal with before getting another pet.
@@JohnAudioTech I imagine how sad you are..... i am very sad about your loss...i do have a cat too.... great friend!
more power lol nice videos
Is it okay to use 50hz 0db to test the RMS of Op amp??
It wouldn't be ideal but it would work of course, not ideal as some amps might start to rolloff the low end.
Sir please make a small video on snickers.Share some photos and information.
why? he already did one
I may make a tribute video at some point when I have the time. I was thinking about putting old clips in some videos.
thats why i gave up on banana plugs a while ago
se puede hacer modo bridge
Thanks.sir piliz pcb pdf file upload.my home using.