Selecting better transistors for the JAT EZ amplifier project

[@JohnAudioTech]

Hey everyone! I want to check the feasibility and modifications needed to make the JAT 501 amplifier run in class A mode. This will be in an upcoming video.

[@19janiboy96]

Awesome!

[@TheTrueVoiceOfReason]

That's a big interest right here!

[@19janiboy96]

Would it be possible to make both Moses switchable

[@RandomUser6947]

Have you looked at the 2N6488 and 2N6491 transistor pair ? Cost below $1, 80Volts, 15A, 75W. They are only 5Mhz, but that's still 2.5 times the 3055. It should normally be enough for audio. When building a cheap and easy amp, you may not want to use too fast a transistor. They do tend to become harder to keep stable under all conditions, if they are too fast. So 40,50,60 MHz might not be a good idea, if everybody should be able to build one and make it work. But that's only my humble opinion. Thank you for the great videos.

[@JohnAudioTech]

@@RandomUser6947 I'll buy a set of those to try as well. Pretty wild gain vs temp. I hope they are thermally stable.

[@TheTrueVoiceOfReason]

Happy birthday Snickers!!! Better rest up, there'll be some builds to inspect pretty soon! You're a great cat dad, John. Good to have a new video to share.

[@jyrkiiinatti1660]

Happy Birthday Snickers! My cat ( Elvis) has the same colouring and he is 4 years. He sends greetings to Snickers from Finland.

[@jean4756]

Tank you for all. Very good speakers i'm so happy for this experience and perfect video and speakers for all. To Brasil we speak for you tank you.

[@wastingtime9152]

Happy Birthday Snickers - from me and Frank!

[@cassvirgillo3395]

Hey John, I guess it's good to be busy, (?). Good video, very informative, always great explanations about the circuit, the how & why. Ol' Snickers getting up there thanks to a good forever home, good care & love. Till next time, be good, C.

[@amitghosh6966]

I loved your videos. Please do a video on how to get rid of Clipping when using any audio source with an amplifier on full volume

[@Nono-hk3is]

HBD Snickers! 🎂🎉🎈

[@ipissed]

🎉🎈❗️HAPPY BIRTHDAY SNICKERS ❗️🎈🎉

[@argcargv]

I think you could probably use the darlingtons if you put a low pass filter in the driver stage. Probably the slowness caused shoot-through at higher frequencies.

[@iblesbosuok]

Why don't you use power mosfet? IRF530 IRF9530 would work well. Btw, happy birthday Snickers. Cheers from Indonesia

[@ahmadfaraz3346]

HI, try TIP41C, 42C for the output with c2383/a1013 in the driver place. will work fine and are cheap also

[@cesarbordallo8997]

Nice video! Love your channel! Did you ever consider using the TIP Darlington Complementary Silicon Power Transistors series? I have seen some older amplifiers using either the TIP120 series or the TIP140 series. Granted that they are not listed for hi-fi audio application, but since you consider some switching transistors, I would really like to hear your opinion on them. Keep the good work. Looking forward to the JAT501 finished board!

[@ahmadfaraz3346]

Dear john is there any final video on this jat ez amplifier .....final schematic and build ...

[@JohnAudioTech]

It has gone in a new direction with a different design. Once I get my other projects done, I'll start on it again.

[@jimhough6233]

Thanx John!

[@t1d100]

Good info

[@peterjmcgee4680]

Have you tried SC 1941 or 1943's those are both pretty good

[@jimhough6233]

Yes to class a version.

[@cocosloan3748]

Darlington=Problems! Put a BD139 and 2SC5200 !

[@trevorvanbremen4718]

Is there any reason why you're staying with a Darlington configuration now that you're moving to discrete transistors rather than making each half a Sziklai pair?

[@JohnAudioTech]

Each config has its advantages and disadvantages. CFP is more linear but at a cost, such as stability. In the EZ amp, I wanted to use the monolithic darlingtons to keep the part count down but, alas, they didn't work out.

[@1pcfred]

Everybody is a critic. You need to lighten up some. Those transistors just suffer from a little bipolar disorder.

[@beverpix]

Dear sweet Snickers

[@JeffrayCrownwell]

Well I found some nice 2SA1943 and 2CS5200 for only $2.00 each on Amazon.ca and I hope I can find a nice project and build a good amplifier with them.

[@cocosloan3748]

You ca find the even cheaper or even at 8$ a piece"originals" but both cases might be fake.Only way to be sure they original is passing 3A current trough them.Fake ones will die at 1 A even! But eve witth fake ones you can make that amp to pull some 20-40W wich is enough in many cases!

[@1959Berre]

Sounds fishy, probably fakes.

[@fredfabris7187]

I hate how work gets in the way of the important crap I want to do!!! 😜

[@MrDunk66]

👍🏾👍🏾

[@jimhough6233]

Seems like the monolith would be faster? Go figure.

[@saiprasad8078]

Hello

[@johnbravo7542]

I don't know why you're trying to build cheap,and your harping on about cheap,cheap,cheap , when you can buy a cheap amplifier from China,build a great quality amplifier to make it worth your time and experience,I think that's what people want.$3 transistor big deal,geez how many of them do you need,common man.

[@ferrumignis]

He wants to build a good quality amplifier for the lowest practical cost. No one will be interested in building this if it needs expensive, hard to find components.

[@johnbravo7542]

@@ferrumignis No kidding Genius

[@johnyang799]

You already have 501. People want something easier and cheaper to build. So here is the EZ amp.

[@johnbravo7542]

@@johnyang799 Pfft…..

[@ferrumignis]

@@johnbravo7542 What's your problem son?

[@jimhough6233]

Thanx John!

[@jimhough6233]

Seems like the monolith would be faster? Go figure.