100 watts @ 4 Ohms with the JAT501 project amplifier

Testing the JAT501 prototype audio amplifier with a 4 Ohm load on +/- 35 volt supply rails to see what output power can be reached before clipping.
Link to PCB video: • JAT501 Amplifier (Doub...
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Thank You!

[@EngineeringEssentials]

Your videos are of great help to me. 🙏

[@steveswan5714]

Nice work John 👍🏴󠁧󠁢󠁳󠁣󠁴󠁿

[@andymouse]

I would love to have a go at designing a board, for no other reason than I love PCB design and I could learn more about audio work, that and a decent amp at the end of it all, will contact properly after your vid...cheers.

[@DAVIDGREGORYKERR]

You can get high power transistor modules like the Mitsubishi QM100HC-M and if you can get the PNP version of this module you might have problems at high currents.

[@audiohome9773]

Good to see this project, love from india.

[@elecchal444]

Sorry, think I missed something.. where are the PCB designs available? Thanks.

[@saanjayray]

I love your JAT501 , can yoy please design a driver board which can drive 20 pairs of 2SC5200 & 2SA1943 . To achieve more power for outdoor operation

[@Deep_X_robi]

You can go class d amp for more power without heating and low cost and light weight

[@saanjayray]

@@Deep_X_robi yaar class D bana toh lunga par usko repair karne me muskil aati hai. Class AB toh bina koi dikkat repair ho bhi jaati hai

[@Deep_X_robi]

@@saanjayray Has ye baat to h Par overall dhekhe tab Bhi class d jyada sasta padega

[@Deep_X_robi]

@@saanjayray Class d reduce transformer and heating That mean the cost is half than class ab

[@Deep_X_robi]

@@saanjayrayif you need hi quality and protection features U can see wahyu eko romadhon videos

[@carlfranz6805]

I know John likes powerful amps, but what I wish to see is the cleanest, most musical 16 watt amp. I have really good, efficient speakers. I don't need or want 100 plus watts. Please John, for those of us who like our music without the ability to sterilize frogs at 200 meters... throw us a bone here. Thank you.

[@JohnAudioTech]

I'm actually more interested amps up to around 25 watts. This amp can be operated on reduced supply voltages, say +/- 15v for reduced power and heat. If you like chip amps, the LM1875 will work well in the 15 watt range.

[@mickblackmore290]

YOU don't have to turn it up!

[@Redh0und]

Hey John, great content as always. I was just wondering if you have any experince with the sanyo STK hybrid chips, and if so, what do you think of them?

[@JohnAudioTech]

I have no problem with them performance wise. They had some with great performance. The problem is if they fail, it can be hard to find authentic replacements.

[@DAVIDGREGORYKERR]

What about using the IXFN 360N10T and it's complement which should solve a few little problems

[@MassimoTava]

I would be interested in buying a kit.

[@dexterperucho90]

CAN I USE 55-0-55VDC for its power???? Thank you sir john

[@JohnAudioTech]

No. +/- 35vdc (40 max)

[@indridcold4210]

What is the advantage of this amplifier over something like the TDA7293 at roughly the same wattage?

[@JohnAudioTech]

That chip is being pushed if operated at more than 29v rails with a 4 ohm load.

[@elecchal444]

Also, I find that Class D can give really bad FM interference, so don't work well with radios.

[@KuntalGhosh]

U should try some clones of quad 405 amplifier kits on ebay and explain us how a class a can produce 100w without making a light bulb 😂

[@martinda7446]

The Quad is not class A.

[@JohnProjetosCaseiroYT]

IM FROM BRAZIL 👏🏼👏🏼👏🏼

[@Rudofaux]

The book, the movie, or the country?

[@Deep_X_robi]

These capacitors are Panasonic capacitors?

[@JohnAudioTech]

Filters are old Nichicons.

[@luisfioretti2849]

El circuito ? The circuit ?

[@sixtyinsix]

snickers needs a youtube page!

[@1pcfred]

How come you cannot lay out the board?

[@JohnAudioTech]

I need to learn the software. Between work, KZbin and other stuff I'd rather be doing, I don't have the interest or time.

[@1pcfred]

@@JohnAudioTech that's what they all say. I bet if you learned schematic capture you'd think it was fun. I used to love running the auto router in Eagle. I wish KiCAD had an auto router like that. In KiCAD I love the 3D view. When you lay a board out you can pop open a 3D view of what the board will look like. That's cool! You can spin it around. It's pretty useless. I think they just did it because it is cool.

[@JohnAudioTech]

@@1pcfred If work ever slows down I might put in the effort. I've been getting busier and busier. I used to do two videos a week and now I'm lucky to get one done. I do have a few projects I want to make boards for such as LEDs, micro controllers, op amp circuit and such.

[@1pcfred]

@@JohnAudioTech when you decide to get going it should not take you long. Knowing electronics is a big leg up. You'll pick up how to use the software fast. I've learned how to use two schematic capture software suites and they both work the same way. You draw the schematic and then the board art. The schematic informs the program what is connected to what. Once it knows that it can guide you while you lay out a board. You work with a rat's nest. Your part pads and air wires. You place parts and draw traces between pads. Easy peasy.

[@SG-jc2hr]

Full bridge rectifier.. electroboom could relate 😄

[@Rudofaux]

A full bridge rectifier. Ain't no half or quarter bridge rectifiers on this bench.

[@Deep_X_robi]

I suggest to see wahyu eko ramadhon videos

[@Gamer-yt3xv]

Why u did not play music & speaker test ? Just wasting others time

[@jayvadgama7076]

Why you removed my comment????

[@JohnAudioTech]

I didn't delete any comment.

[@briangoldberg4439]

Hi John, I remember how you said you were a classic rock fan. If you haven't heard them before, I would recommend checking out the Edgar Broughton Band. They are a British hard rock band from the late 60's/early 70's. kzbin.info/www/bejne/aYbKfIKVgLtpg80

[@mickblackmore290]

I have been in garage bands that sound better than that. It sounds like it was recorded on a Walkman. JMO

[@briangoldberg4439]

​@@mickblackmore290 You can't judge the recording quality based on a crappy youtube rip. The first three EBB records are classic early heavy metal/psych along the lines of early Blue Cheer or The Groundhogs. If this stuff is not your cup of tea, then you will just not get it. That stuff is not for everyone.

[@mickblackmore290]

@@briangoldberg4439 I'm 69 I grew up on the west cost still have my Hendrix ticket stub saw Led Zep debut there 1st album, with Black Sabbath. was into The Floyd before they were Pink. I have been IN a Rock Band since 7th grade I like to think I know good music and recordings when I here them. I am aware lots of people have different taste, BUT i am also aware some peoples taste is only in there mouth. There is so much REALLY GOOD music out there why bother with nasty recordings no mater where there at. JMO

[@techsandtrips]

IM FROM INDIA 👏👏👏

[@Deep_X_robi]

Class A is very outdated Try new Like class g or class d

[@PeterMilanovski]

There are some things in life that can't be done better than what was already done a long time ago! Class A amplifiers I would say were possibly the first type of amplifier design and nothing since it was invited either in solid state or vacuum tube can do better. Try getting a better audio source than reel to reel tape! You can't! It doesn't exist... Did you know that back in the 1920's they had Electric car's? Yes it's true.. the only reason why they stopped making Electric car's is because petrol was cheap and gave much longer range, but they knew back then that Electric was better.. battery technology had to mature for Electric car's to come back again... And here we are today still with class A amplifiers and Electric car's...

[@Deep_X_robi]

@@PeterMilanovski I'm impressed bro U are awesome