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8th May 2010, 02:37 AM
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#2 |
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diyAudio Member
Join Date: Nov 2007
Location: Dallas
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What are the mystery black boxen? 3way current mirror???
It would make sense both emitters of the diamond buffer to operate at same current? And then also couple this same current into the output... But thats just me thinking, I am no translator. The middle leg would be the master and the other two the copies... I suspect the other black boxen are +4 and -4V regulators, with a feature to be disabled (open circuit) to shut down the entire amplifier. |
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8th May 2010, 08:36 AM
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#4 |
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diyAudio Member
Join Date: Feb 2005
Location: Copenhagen
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Where did you find it? If it's in japaneese you could google-translate is wich usually gives an understandable english from japaneese.
Anyway - i studied quite some Pioneer schematics during the years, and with input fets I would think we are in the high-end category. It could one from the "Exclusive" series, or the integrated A09, A07. Two links to get you closer: TVK °7 : Pioneer HiFi Engine | Download Free User/ Service Manuals, Amplifier, Receiver, CD, Tape, Tuner, Video (requires login, but its free and there are many schematics)
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8th May 2010, 07:15 PM
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#6 |
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diyAudio Member
Join Date: Nov 2006
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Some Information
"http://www.geocities.jp/bluegourdscastle/audio/amp-011.html" Above site have the current mirror circuit informaton (fig). And more explanation (fig) of the current mirror circuit is bellow "http://www.geocities.jp/mason_ishiatama/kaiseki/kaiseki1/Kaiseki1-5.htm" Regards. |
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8th May 2010, 07:21 PM
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#7 |
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diyAudio Member
Join Date: Jun 2004
Location: USA
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The circuit is of Pioneer CZ-1(a). The mysterious boxes are covered here:
Low-distortion Super-pair Buffer simulation schematics
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9th May 2010, 07:11 AM
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#8 |
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diyAudio Member
Join Date: Jun 2004
Location: wroclaw
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Very similar schematics you can find in Pioneer M5
And this type of topology is called Super Linear Circuit the Headphone amplifier AES E-Library: Super Linear Circuit by Ozawa, Okio; Ishikawa, Kikuo Pioneer M5 |
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10th May 2010, 07:57 AM
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#9 |
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diyAudio Member
Join Date: May 2002
Location: Taiwan
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The Pioneer Exclusive M5 service maunal:
Pioneer M5 Exclusive Service Manual free download,schematics,datasheets,eeprom bins,pcb,repair info for test equipment and electronics
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Sky Chu Last edited by SkyChu; 10th May 2010 at 08:06 AM. |
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14th May 2010, 01:33 AM
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#10 |
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diyAudio Member
Join Date: Mar 2008
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Somebody build an amplifier with SLC topology? Experiences?
A few months ago I build an Andrea´s amplifier for low power amp (<20W) with very good results but no measures. the Headphone amplifier
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Pioneer Japanese Schematic
