any build this..how sound

tadiam · 29th August 2007, 12:18 PM

schema

darkfenriz · 29th August 2007, 01:44 PM

Looks like none's built and doesn't sound at all.

GK · 30th August 2007, 02:32 AM

Quote:

Originally posted by tadiam
how sound

With the cathode of D2 connected to the emitter of Q2 instead of the base, no frequency compensation and a woefully inadequate VAS load (R9) I'd say likely sound not good.

Cheers,
Glen

lumanauw · 30th August 2007, 02:27 PM

It's a bit confusing, but I guess it is a classA variant of this principle :
http://www.diyaudio.com/forums/attac...amp=1097786469
The VBE multiplier (Q12) has steady voltage drop. The value will be the same as = VbeQ2+VbeQ4+VdropR22(10ohm). If adjusted properly, it will make a CCS system for R22 (there's always current passing thru R22)
D1+D2 is a limiter, imagine it is not conducting.
Simple but smart principle, makes the output stage never turn off

(at least above the paper, never built it)

tadiam · 30th August 2007, 10:21 PM

good link
thanks all visitors

30th August 2007, 10:21 PM	#5
tadiam diyAudio Member Join Date: Mar 2007	re good link thanks all visitors __________________ audio

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29th August 2007, 01:44 PM	#2
darkfenriz diyAudio Member Join Date: Jun 2004 Location: Warsaw	Looks like none's built and doesn't sound at all.

30th August 2007, 02:27 PM	#4
lumanauw diyAudio Moderator Emeritus Join Date: Oct 2002 Location: Bandung	It's a bit confusing, but I guess it is a classA variant of this principle : http://www.diyaudio.com/forums/attac...amp=1097786469 The VBE multiplier (Q12) has steady voltage drop. The value will be the same as = VbeQ2+VbeQ4+VdropR22(10ohm). If adjusted properly, it will make a CCS system for R22 (there's always current passing thru R22) D1+D2 is a limiter, imagine it is not conducting. Simple but smart principle, makes the output stage never turn off (at least above the paper, never built it)

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