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4th November 2012, 07:02 PM
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#92 |
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diyAudio Member
Join Date: Aug 2011
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Ok, started it, but :-(... I have: +/- 33.7V rail, DC on output -6.2V, voltage on source resistors(1ohm) -- 0.35V. R8(R11) source of Q3. --5.2V, R14(R18) -- 4.75V.
(BrianGT boards notation). So everything looks perfect except DC offset. My Q1 and Q2 are matched perfectly, but I have a 100k R8(R6) resistor, maybe it is it? 
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4th November 2012, 07:23 PM
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#95 |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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everything up to 100mV is considered as OK
still - lesser is better
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my Papa is smarter than your Nelson ! clean  thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM 
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4th November 2012, 07:27 PM
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#97 |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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ya have Algar_emi's Aleph pdf ?
__________________
my Papa is smarter than your Nelson ! clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
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4th November 2012, 07:33 PM
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#98 |
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diyAudio Member
Join Date: Jun 2004
Location: ARKANSAS
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Let her run for a bit and settle down, and measure it then.
Like they said 35mv is not really "bad", but it will change after warmup so let her run some now. Steve
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If a inch of duct tape will fix it, 3 feet should fix it for life!!!! |
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4th November 2012, 07:37 PM
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#100 |
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diyAudio Member
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
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.
__________________
my Papa is smarter than your Nelson ! clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa...© by Mighty ZM
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