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Old 16th January 2014, 12:08 PM   #81
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Dear LC,

Email sent for 6 modules, hope you did get it

Cheers!
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Old 16th January 2014, 02:27 PM   #82
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email sent
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Old 16th January 2014, 08:38 PM   #83
sonnya is offline sonnya  Denmark
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Quote:
Originally Posted by fab View Post
My guess would be an added driver stage between the VAS and the output.?...
I have already done that last year and used old medium Lateral MOSFET for the driver stage . The sound was good but I have damaged the amp and have not repaired it since then...

Your implementation is of course awesome . Mine was done using modified boards with wiring....

Fab
Most likely like this.

Click the image to open in full size.
It helps keeping the drive circuit fast enough to lower the switchcurrents in the VAS stage.
- Sonny
Attached Images
File Type: jpg driver.jpg (16.9 KB, 145 views)
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Last edited by sonnya; 16th January 2014 at 08:40 PM.
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Old 16th January 2014, 10:37 PM   #84
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Quote:
Originally Posted by supernet View Post
Fantastic job LC
Thanks for kind words and honest opinion.
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Old 17th January 2014, 01:19 AM   #85
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Email sent for 2 modules. Thanks a lot
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Old 17th January 2014, 02:31 AM   #86
Jay is offline Jay  Indonesia
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Quote:
Originally Posted by fab View Post
My guess would be an added driver stage between the VAS and the output.?...
I think LC had mentioned about this driver stage. I personally subscribe to the idea of driver stage between VAS and LATFET, but I didn't see it as a mean to lower THD.
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Old 17th January 2014, 06:13 AM   #87
sonnya is offline sonnya  Denmark
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Quote:
Originally Posted by Jay View Post
I think LC had mentioned about this driver stage. I personally subscribe to the idea of driver stage between VAS and LATFET, but I didn't see it as a mean to lower THD.
My test In spring 2013 gave me 30dB improvement @ 20KHz
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Old 17th January 2014, 07:01 AM   #88
miksi is online now miksi  Serbia
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LC, how did you select double die mosfets to achieve such a exceptional measurements? And for that matter what about the rest of transistors, did you pair them...maybe?
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Old 17th January 2014, 08:25 AM   #89
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Hi miksi

Normally those parts are selected carefully but no rocket science here, just pure and simple measurements. Also the second channel confirms the same measurements performance with ease.

Some recipes saved by the author, I'm sure it is understandable and acceptable hehe

Regards, L.C.
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Old 17th January 2014, 09:13 AM   #90
Eric06 is offline Eric06  France
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Hi,

Is there any particular speaker protection (DC + tempo) that would you recommend to companion the First One?
I suppose a dual mono is preferable over a stereo unit with common ground.
In this category I spotted essentially 2 models version 1 and version 2
Advice welcome.

On another category, I suppose the first one features SE input (although I am not sure since symbo indicates IN+ and IN-). Does anyone came into a good balance to single-ended front-end solution?
Remark: my diy preamp is fully balanced (UGS pass like design) hence the question.

Thanks.
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