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Old 19th June 2008, 12:21 PM   #1
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Default 1st Gainclone

Ok, I've read enough, drooled over the pics and I'm going to have a go.
I have good soldering skills and fiddle around with HI FI
having had a few lessons from very clever engineers at a Hi Fi shop where I worked for years part time.

My understanding of electronics is limited to recognising polarity,
replacing resistors, smoothing caps, transistors, wiring and stripping rebuilding - the really easy simple stuff..
I'm careful, have a big bench power supply and test meter
to assist me with my anorak moments.

For me to make a gainclone from scratch I'd need close up pictures of point to point as my understanding of schematics
is poor.
I can easily copy something but not with diagrams !

Clearly you guys are all experienced electronics hobbyists or engineers and I fall a long way behind - apologioes in advance !

Any clear close ups of what goes where would be great.

Is there a better way ?

Any help from patient people would be great !!

Many thanks Andrew
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Old 19th June 2008, 12:35 PM   #2
Puffin is offline Puffin  United Kingdom
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This is the easiest way to make a Gainclone.

http://myweb.tiscali.co.uk/nuukspot/...lone_3886.html
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Old 19th June 2008, 12:41 PM   #3
AndrewT is offline AndrewT  Scotland
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search
Carlosfm
and
Vikash
in the chipamps section
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Old 20th June 2008, 08:34 PM   #4
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Also check dogbreath.de Simple designs with very detailed photographs and explanations and clear schematics. You could try his copy of the original gaincard.

He has even simpler designs but you have to be careful because they do not offer protection against DC offset and your speakers could be at risk if you do not know what you are doing.

Regards
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Old 23rd June 2008, 10:33 PM   #5
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Ditto to what Puffin said
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Old 24th June 2008, 11:09 PM   #6
DC Dave is offline DC Dave  United States
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Copying from a picture might work, but what will you learn from that.

Learning to read a schematic is your best bet. It is not difficult. A chipamp schematic is a great place to start as there are only a few components to deal with. Just some resistors and capacitors. Make sure you download the data sheet for whichever chip you use. If you get confused, google, go to the data sheet or come back here and ask.

Shown is a very simple circuit for the LM1875. Only 6 components plus the chip.
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File Type: jpg amp 1875 schematic build 3.jpg (35.2 KB, 515 views)
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Old 25th June 2008, 02:32 AM   #7
digi01 is offline digi01  China
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FYI,the attached is my 3886igc connections.

..z
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File Type: gif 3886connections.gif (8.9 KB, 517 views)
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Old 25th June 2008, 02:33 AM   #8
digi01 is offline digi01  China
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and the pdf is schematic.

..z

good luck!
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File Type: pdf 3886sch.pdf (37.5 KB, 83 views)
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Old 25th June 2008, 08:11 AM   #9
AndrewT is offline AndrewT  Scotland
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Digi,
your schematic does not match the layout. That will confuse him.
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Old 25th June 2008, 08:47 AM   #10
digi01 is offline digi01  China
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i know,i have not draw the Rt,Ct.it is option.

i hope you can understand zang
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