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Old 18th September 2013, 01:36 AM   #321
Aniket is offline Aniket  India
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Hello dvv,

my boards are already manufactured 3 months ago, i sent only the pdf files to the manufacturer.
In fact, I need the PCB layout files.

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Aniket
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Old 18th September 2013, 12:10 PM   #322
alex mm is offline alex mm  Romania
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........ but you have gerbers files
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Alex
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Old 18th September 2013, 12:27 PM   #323
Aniket is offline Aniket  India
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Hello Alex,

I have the gerber files, but these files have some problem importing them in Sprint Layout 6.
that's why I am asking for layout files.

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Aniket
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Old 18th September 2013, 12:29 PM   #324
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Hi Alex , Hi Aniket . Another member has asked me about a phono stage . We can do a lot on a ready made PCB for less than $1 from RS ( 4 to do the job ) . Problem is he wants it small ( SMD perhaps , perhaps not because good capacitors are large ) . If we get that far any advice ? Even with Gerber files it needs someone to do it . I have seen PCB's for $10 . That seems too good to be true .
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Old 18th September 2013, 12:56 PM   #325
Aniket is offline Aniket  India
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Hi Nigel,

I got my PCB's manufactured locally. I sent only the pdf files to manufacturer(he created the gerbers himself). Minimum quantity to order is 15, so i ordered him 16. He charged me 500 Indian rupees (~10$) per PCB, which itself is a good deal, considering the size of the PCB, and they were very good quality.

Hi Alex,
m waiting for the layout file.
Thanks in advance.

Regards,
Aniket
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Old 22nd October 2013, 07:53 AM   #326
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Quote:
Originally Posted by Aniket View Post
With just 24mA bias per device, and 9.3nV DC offset. 980W@2R ultra low THD of 0.169% @ 20kHz, with 5 pairs MJL21193/4. THD could be further reduced using more output pairs.
Just simulated my design, wonder it would perform like this in real.

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Aniket
whitch simulation software is using
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Old 22nd October 2013, 11:34 AM   #327
Aniket is offline Aniket  India
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Multisim 13
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Old 23rd October 2013, 04:32 AM   #328
Gost22 is offline Gost22  Bolivia
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Hi guys!
Guys I am on the simple schematic developed this audio amplifier.
Somewhat satisfied with its sound!?
So if you have some ideas about some changes go ahead with the comments.
Regards!
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File Type: jpg 100W amplifier.JPG (51.0 KB, 251 views)

Last edited by Gost22; 23rd October 2013 at 04:38 AM.
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Old 23rd October 2013, 04:46 AM   #329
Gost22 is offline Gost22  Bolivia
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Quote:
Originally Posted by Gost22 View Post
Hi guys!
Guys I am on the simple schematic developed this audio amplifier.
Somewhat satisfied with its sound!?
So if you have some ideas about some changes go ahead with the comments.
Regards!
Attached Files
File Type: pdf Figure 1. (2sc5200.pdf (88.1 KB, 60 views)

Last edited by Gost22; 23rd October 2013 at 04:54 AM.
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Old 23rd October 2013, 07:23 AM   #330
dvv is offline dvv  Serbia
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I'd just like to say that its voltage slew rate is rather low, at around 5 V/uS. I'm no slew rate freak, but ideally it should be at least 14 V/us to satisfy the criterion of 0.5V/uS per 1 V of peak output. Preferaby 28 V/uS, to satisfy the criterion of 1 V/uS per peak volt output.

In other words, you may experience some slew rate induced distortion (SID) with fast music material. This is distorion caused by an amp's inability to properly track the signal because the input signal is faster than the amp.

Also, I don't see much point in using electronic protection as there is an output fuse.
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