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Old 29th August 2007, 12:18 PM   #1
tadiam is offline tadiam  Argentina
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Default any build this..how sound

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Old 29th August 2007, 01:44 PM   #2
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Looks like none's built and doesn't sound at all.
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Old 30th August 2007, 02:32 AM   #3
GK is offline GK  Australia
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Default Re: any build this..how sound

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.

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Old 30th August 2007, 02:27 PM   #4
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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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Old 30th August 2007, 10:21 PM   #5
tadiam is offline tadiam  Argentina
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good link
thanks all visitors
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