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Old 24th May 2013, 03:41 PM   #1
Bonsai is offline Bonsai  Taiwan
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Default sx-Amp and nx-Amp

I've put the complete Gerbers and drill files for these amplifiers up on my website hifisonix.com: Audio Amplifer Design and Music Reviews. If you want to make 'em, everything is there - look under the respective amplifier posts.

If you have not assembled your amplifier modules yet, or are having problems adjusting the offset/2nd stage bias current, kindly make the following changes:-

R36 and R37 become 150 Ohms
R28 and R29 become 110 Ohms
R1 becomes 4.7k (but first read the notes in post 832 linked above)

Download the nx-Amp build document here http://hifisonix.com/wordpress/wp-co...ier-V2.0_8.pdf

The reason for the changed resistor values is explained in this post sx-Amp and nx-Amp.

You buy a set of through hole plated, silk screened gold flashed boards from Jim's Audio here: 100W 100W Ovation NX AMPLIFIER100 w 100W Current Feedback Amplifier PCB Set | eBay

The set includes 2 off amplifer boards and 1 off PSU board. Price excl. shipping is about $25

Any questions, feel free to ask me

I have had a number of requests for sx-Amp boards from people who want to etch their own. Below you will find a single sided version of the sx-Amp board - you can use this layout to etch your own boards. A component overlay is also included. The component numbers are the same as in the write up.

sx-Amp and nx-Amp

For thoseof you that want to get your boards etched by a PCB company, here is the link to the Gerbers sx-Amp and nx-Amp


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Last edited by Bonsai; 7th September 2014 at 03:36 PM.
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Old 24th May 2013, 05:41 PM   #2
Bonsai is offline Bonsai  Taiwan
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The title should read sx-Amp and nx-Amp. The merlot is to blame.
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Old 24th May 2013, 09:53 PM   #3
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Brilliant work!
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Old 25th May 2013, 08:46 AM   #4
Bonsai is offline Bonsai  Taiwan
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Thanks Greg!

The merlot wasn't bad either - an Aussie 2007!
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Old 25th May 2013, 09:33 AM   #5
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nice
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Old 26th May 2013, 10:31 PM   #6
Holgi is offline Holgi  Germany
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Nice work, though I don't really like a merlot
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Old 26th May 2013, 10:59 PM   #7
PMI is offline PMI  United States
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This looks very cool! And, besides being very generous to post the gerbers (!), I can actually understand the description in the PDF file, without a secret decoder ring...
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Old 26th May 2013, 11:08 PM   #8
Bonsai is offline Bonsai  Taiwan
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Quote:
Originally Posted by Holgi View Post
Nice work, though I don't really like a merlot
Zinfandel? Cab?
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Old 26th May 2013, 11:09 PM   #9
Bonsai is offline Bonsai  Taiwan
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Quote:
Originally Posted by PMI View Post
This looks very cool! And, besides being very generous to post the gerbers (!), I can actually understand the description in the PDF file, without a secret decoder ring...
Thanks!
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Old 31st May 2013, 08:28 AM   #10
Holgi is offline Holgi  Germany
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Quote:
Originally Posted by Bonsai View Post
Zinfandel? Cab?
Cab is fine, though if I may choose freely (and without arguing with my gf) I'd rather go for a classic good ol' german beer
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