Hi all!
Will I create an audio amplifier for these schematics to the output transistor pair tip35c/tip36c or bd249c/bd250c, so please give comments on the schematics?
thank you!
Will I create an audio amplifier for these schematics to the output transistor pair tip35c/tip36c or bd249c/bd250c, so please give comments on the schematics?
thank you!
Attachments
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Hi Alex!
I apologize a lot, because audio amplifier with schematic (left schematic), a better option I pray that you design PCB and I will then make the audio amplifier.
Best regards!
I apologize a lot, because audio amplifier with schematic (left schematic), a better option I pray that you design PCB and I will then make the audio amplifier.
Best regards!
I suggest you none of these ones.
Try Dx Blame ST or Dx Super A.... there are threads about them... use the search button up and right side of your screen.
Here you have a example of the audio quality....was recoded with a cell phone Nokia N8....now imagine the real quality if you go there to listen or if it will be playing at your home.
https://www.youtube.com/watch?v=nhrZAOABcHM&index=17&list=FL9xnp-350vDnDhEpNv_XVxg
regards,
Carlos
Try Dx Blame ST or Dx Super A.... there are threads about them... use the search button up and right side of your screen.
Here you have a example of the audio quality....was recoded with a cell phone Nokia N8....now imagine the real quality if you go there to listen or if it will be playing at your home.
https://www.youtube.com/watch?v=nhrZAOABcHM&index=17&list=FL9xnp-350vDnDhEpNv_XVxg
regards,
Carlos
Attachments
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I have threads and all informations are posted there
Schematics, adjustment and details are there..also pictures and sketched.
If you feel interested go there and capture all data you want or need.
We also have pcboards...in Brazil, the white pcboards, search for Fábio Zimmer:
imap.eletro@gmail.com
To the international market we have Puerto Rico distribution site.... runned by Juan Vargas Diaz (the blue pcboards).
Zimmer has pcboards to use together TO3 power transistors..MJ15004 for instance.
juanvargasdiaz@aol.com
You will have all layout, for free, if you want to etch....go to the threads and capture there all you may need.
If something is missed..then came to uncle charlie...but only after reading the whole and entire thread.
regards,
Carlos
Schematics, adjustment and details are there..also pictures and sketched.
If you feel interested go there and capture all data you want or need.
We also have pcboards...in Brazil, the white pcboards, search for Fábio Zimmer:
imap.eletro@gmail.com
To the international market we have Puerto Rico distribution site.... runned by Juan Vargas Diaz (the blue pcboards).
Zimmer has pcboards to use together TO3 power transistors..MJ15004 for instance.
juanvargasdiaz@aol.com
You will have all layout, for free, if you want to etch....go to the threads and capture there all you may need.
If something is missed..then came to uncle charlie...but only after reading the whole and entire thread.
regards,
Carlos
Attachments
PCB-bottom layer in pdf
Very nice looking PCB.
Alex, show PCB-bottom layer in pdf (in the ratio 1:1) that could build plate of the audio amplifier.🙂
Thank you for your cooperation!
cheers!
Very nice looking PCB.
Alex, show PCB-bottom layer in pdf (in the ratio 1:1) that could build plate of the audio amplifier.🙂
Thank you for your cooperation!
cheers!
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Radio,
For your schematics on the left, it has been recommended to connect a cap equal to C5 from the collector of Q3 to ground.
In the schematics of the DxSuperA, I am puzzled by the 220nF cap connected to ground.
It has been said here that such a cap can be useful to enhance the PSRR of the negative power supply rail if its value is about the same as the 150pF or 220p compensation cap.
For your schematics on the left, it has been recommended to connect a cap equal to C5 from the collector of Q3 to ground.
In the schematics of the DxSuperA, I am puzzled by the 220nF cap connected to ground.
It has been said here that such a cap can be useful to enhance the PSRR of the negative power supply rail if its value is about the same as the 150pF or 220p compensation cap.
The schemo on the left is a lot like the design for the Si-Lver Fox that I prototyped in 2005. I knew better to claim originality since with all the man-millenia of R&D, I figured it had probably been done before. It was a few years later before I saw something very similar in a Hitachi application report. That design, however, used complimentary MOSFET pairs, not BJTs.
As for how it works, very well indeed, and sonically it out performs a lot of "Big Box" amps. That's the one I'd go for.
Power supply for this audio amp
Hi,
Can I use this power supply (given with schematic) for this amplifier?
thank you!
Hi,
Can I use this power supply (given with schematic) for this amplifier?
thank you!
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The left one is hundred years old design. Nothing special about it. I always was wandering why people stick to old stuff ?? How you can say it is HI quality by looking at the schematic? =) It is so called Marshall design, 50 years old, nothing special, parameters depend purely on elements selection.
The right one, is the same. Pure symmetrical amplifier. Nothing special. Why bother make it? 2014 year outside the window.
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I would not build either. Again, something well sorted like the DX Blame might be a better choice. Even the MX-50 kit.
I see some of the above boards have TO-3 type outputs. This package was a disaster from day one as it requires you to take the current through the mounting hardware stack. TO-3P or larger packages avoid these problems. The only thing worse than TO-3 is sandwiching the board.
I see some of the above boards have TO-3 type outputs. This package was a disaster from day one as it requires you to take the current through the mounting hardware stack. TO-3P or larger packages avoid these problems. The only thing worse than TO-3 is sandwiching the board.
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