I have only studied tube amplifiers, but I am interested in transistor amplifiers this time, and I want to study them. The problem is that I know nothing about transistors. I want to buy a kit for under $50 from AliExpress and make it as a beginner. Currently, I am looking at the TDA7293 kit and the Quad405 kit. Which one sounds sweeter? Or is there a kit that you recommend for under $50?
"Completely wrong" means completely wrong, but I mentioned "99% is fake" and not complete.
Since its opening, I have bought hundreds of kits from Aliexpress. The vast majority were made of fake and poor quality components. Almost all of the components I received from Ali were fake that did not participate.
So my determination is based on my experience.
Are you an Aliexpress seller or what?
Since its opening, I have bought hundreds of kits from Aliexpress. The vast majority were made of fake and poor quality components. Almost all of the components I received from Ali were fake that did not participate.
So my determination is based on my experience.
Are you an Aliexpress seller or what?
Funny, but somehow I can't believe it! Because my experience has been exactly the opposite. The board shown above sounds much better than the TDA7293 board from Kaltec, and if you change the op-amp, it's even pretty audiophile! I've built this board into amplifiers 11 times already, and every time the quality and functionality have been very good! China is a big country, where there's a lot of junk, but just as much very good stuff. I don't believe in generalizations or prejudices against Chinese products. If it were as you claim, then Eversolo and other companies wouldn't even exist. I'm not an Ali Express seller, but a German who has been building amplifiers as a hobby for 40 years, and I don't necessarily subscribe to every prejudice because I can think for myself!
Why didn’t you give up after 50, or even 10?
Or is the idea to buy cheap kits and then simply swap out all the transistors from Mouser - and still come out ahead price-wise?
Or is the idea to buy cheap kits and then simply swap out all the transistors from Mouser - and still come out ahead price-wise?
We all tried cheap Chinese/aliexpress kits at one point/in the beginning of our diyaudio journey, but we should abandon those type of projects once we get more educated.
Schaut mal, diese LM3886-Platine kommt aus China. Sie ist perfekt ausgestattet. Der Operationsverstärker ist auf 5-fache Verstärkung ausgelegt, der LM3886 auf 16,666-fache. Zusätzlich gibt es eine universelle Gegenkopplung über einen DC-Servo. Das Platinenlayout ist perfekt auf vier Lagen verteilt, die Lötpunkte und Vias sind vergoldet. Wenn ich mir jedoch Kaltec oder Neurochrome anschaue, würde ich eher vor ihnen warnen, als alle chinesischen Produkte pauschal zu verurteilen.
https://ebay.us/m/Nyi0kQ
https://ebay.us/m/Nyi0kQ
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Hello!
If you are interested in learning about transistor amplifier, the best option is the discrete version.
You will learn how the signal is amplified, how bias works, learn about differential/single amplification, voltage and current amplification etc.
You can make measurements along the signal path, swap components, try differrent adjusts etc.
If you buy the integrated version, there is nothing to learn, since everything is inside the IC.
If my younger self asked me this question I would recommend myself building jlh69. Fairly simple classic, fabulous sound, kits available on e-bay, you can buy two channels well under $50. It's mandatory to read the original article carefully.
It so damm cheap. Just buy both and see which you prefer or if you are loaded get a 100k buck pc of monoblock amp . I am pretty sure you be happy with either one but your enemies will be impress with your stupidity in buying the 100k monoblock.
I did bought a few from China and most are good and I am also using cheap DSP to replace my high end Yamaha already. My car is using a chinese DSP in place of Alpine 80pr now.
I did bought a few from China and most are good and I am also using cheap DSP to replace my high end Yamaha already. My car is using a chinese DSP in place of Alpine 80pr now.
I spent years fixing and "correcting" failed professional audio gear. Yes, I learned a lot then but nothing like you learn when you work with SPICE. You will learn very little building existing designs, especially chip-amps. If you want to learn linear electronics, run some circuits through simulation. It's not just the circuits you are testing. It's also your understanding of electronic components and systems. Combined with a little experience with real hardware, you should be able to evaluate the choices made by experienced engineers. You will gain educated opinions about common design features.
There are way more people who eat at fast food outlets than at Michelin star restaurants.
There are ever fewer who bother to learn to cook.
😊
Incidentally, Do It Yourself is a very ambiguous phrase.
What does qualify for "DO" ?
Design it yourself ?
Make it yourself ?
Or buy it yourself ?
Patrick
There are ever fewer who bother to learn to cook.
😊
Incidentally, Do It Yourself is a very ambiguous phrase.
What does qualify for "DO" ?
Design it yourself ?
Make it yourself ?
Or buy it yourself ?
Patrick
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