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22nd June 2004, 08:55 AM
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#1 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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another chip headamp
a test job.
I hook up 3 single channel opamps to directly drive left, right, and ground channels, a la PPA. The initial design uses LM6171 opamps,It is a better choice for this configuration.the 3 access gain setting in 5,and including 10pf slow down caps in feed back loops of each chips.+18v power supply.all hook wire is pc cables,such as SCSI interlink cable. |
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22nd June 2004, 09:24 AM
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#2 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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inside pic:
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22nd June 2004, 09:27 AM
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#3 |
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diyAudio Member
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Hi Digi01,
Those are nice enclosures. Are they commercial? Jan Didden
__________________
/Another new issue: Linear Audio Volume 3! |
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22nd June 2004, 09:34 AM
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#4 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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it is a factory oem case.4mm aluminium front panel.pre-drill holes.very easy in diy jobs.
-digi |
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22nd June 2004, 12:59 PM
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#5 |
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diyAudio Member
Join Date: Jul 2002
Location: Ever sunny San Diego
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digi,
Nice design (as always). I am curious as why you chose a single source power supply(+18VDC) instead of a +/-9VDC with a TLE2425 virtual ground to balance any supply offset. My personal experience has found this to sound better.
__________________
Philip "If you didn't make it with your own two hands, its not really yours". |
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23rd June 2004, 02:50 AM
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#6 |
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diyAudio Member
Join Date: Mar 2003
Location: BEIJING
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thank you Philo
 I like virtual ground mode too.in fact,I have use a 8dip tle2426 for the +/- rail power supply parts work. this is the original sch file:http://elvencraft.com/downloads/minidiffsch.gif by morsel. -digi |
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anymore pic's im going to put it in my pic's server
