1st Gainclone

AndrewGM · 19th June 2008, 12:21 PM

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

Puffin · 19th June 2008, 12:35 PM

This is the easiest way to make a Gainclone.

http://myweb.tiscali.co.uk/nuukspot/...lone_3886.html

AndrewT · 19th June 2008, 12:41 PM

search
Carlosfm
and
Vikash
in the chipamps section

A Sanchez · 20th June 2008, 08:34 PM

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

playntheblues · 23rd June 2008, 10:33 PM

Ditto to what Puffin said

DC Dave · 24th June 2008, 11:09 PM

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.

digi01 · 25th June 2008, 02:32 AM

FYI,the attached is my 3886igc connections.

..z

digi01 · 25th June 2008, 02:33 AM

and the pdf is schematic.

..z

good luck!

AndrewT · 25th June 2008, 08:11 AM

Digi,
your schematic does not match the layout. That will confuse him.

digi01 · 25th June 2008, 08:47 AM

i know,i have not draw the Rt,Ct.it is option.

i hope you can understand zang

19th June 2008, 12:21 PM	#1
AndrewGM diyAudio Member Join Date: Jun 2008	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

25th June 2008, 08:47 AM	#10
digi01 diyAudio Member Join Date: Mar 2003 Location: BEIJING	i know,i have not draw the Rt,Ct.it is option. i hope you can understand zang __________________ 2010 DIY ALBUM UPDATED UCPv1(preamp) & DUAL(power supply)

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19th June 2008, 12:35 PM	#2
Puffin diyAudio Member Join Date: Feb 2006 Location: U.K	This is the easiest way to make a Gainclone. http://myweb.tiscali.co.uk/nuukspot/...lone_3886.html

19th June 2008, 12:41 PM	#3
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	search Carlosfm and Vikash in the chipamps section

20th June 2008, 08:34 PM	#4
A Sanchez diyAudio Member Join Date: Jan 2008 Location: Brooklyn, NY	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

23rd June 2008, 10:33 PM	#5
playntheblues diyAudio Member Join Date: Aug 2005	Ditto to what Puffin said

25th June 2008, 08:11 AM	#9
AndrewT diyAudio Member Join Date: Jul 2004 Location: Scottish Borders	Digi, your schematic does not match the layout. That will confuse him.