better sound or no?

maxpou · 7th February 2008, 08:06 PM

Hi,
i would like to know if i will have a better sound with this mod? Thank you! maxpou
this is my power amp at this time!

maxpou · 7th February 2008, 08:08 PM

modification!

tedr · 8th February 2008, 04:45 AM

what did you change and why?

PMA · 8th February 2008, 07:09 AM

He has buffered the output stage driver (Q14, Q15).

Onvinyl · 8th February 2008, 07:59 AM

Hi,
you might consider to try it out and report back!

Rüdiger

PMA · 8th February 2008, 08:17 AM

Generally speaking, buffering should help to drive high MOSFET capacitances.

peranders · 8th February 2008, 08:57 AM

The mosfet output stage has no feedback, why?

PMA · 8th February 2008, 09:09 AM

No feedback across out. st. only in "modification". Maybe maxpou would tell us the bias current.

maxpou · 8th February 2008, 04:01 PM

thank you Guys for reply!

Quote:

Originally posted by PMA
Generally speaking, buffering should help to drive high MOSFET capacitances.

Yes, but i will have a better sound or no and if yes what's going to change?

Quote:

Originally posted by PMA
No feedback across out. st. only in "modification". Maybe maxpou would tell us the bias current.

i have about 1.35A bias current.

thank you! Maxpou

maxpou · 10th February 2008, 07:27 PM

Hi,
somebody can tell me if my VAS ans driver choice is ok or it would be better? thank you Maxpou

8th February 2008, 04:45 AM	#3
tedr diyAudio Member Join Date: Jul 2006	help us out here.......................... what did you change and why?

8th February 2008, 07:59 AM	#5
Onvinyl diyAudio Member Join Date: Aug 2002 Location: Germany	Hi, you might consider to try it out and report back! Rüdiger __________________ "I can feel what's going on inside a piece of electronic equipment. I have a sense that I know what's going on inside the transistors." Robert Moog

8th February 2008, 08:57 AM	#7
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	The mosfet output stage has no feedback, why? __________________ /Per-Anders (my first name) or P-A as my friends call me

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8th February 2008, 07:09 AM	#4
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	He has buffered the output stage driver (Q14, Q15).

8th February 2008, 08:17 AM	#6
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	Generally speaking, buffering should help to drive high MOSFET capacitances.

8th February 2008, 09:09 AM	#8
PMA diyAudio Member Join Date: Apr 2002 Location: Prague, Kitakyushu, Fukuoka	No feedback across out. st. only in "modification". Maybe maxpou would tell us the bias current.

10th February 2008, 07:27 PM	#10
maxpou diyAudio Member Join Date: Apr 2006 Location: Québec	Hi, somebody can tell me if my VAS ans driver choice is ok or it would be better? thank you Maxpou

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