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Old 26th May 2009, 11:38 AM   #1101
Mike-Toronto is offline Mike-Toronto  Canada
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Quote:
Originally posted by DynacoDave
VLSI, if you have not found another resource on X-Y caps look here:
http://www.justradios.com/safetytips.html
When I restore old radios I add a 3 wire cord and a X-Y cap.
Great link!
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Old 27th May 2009, 05:23 AM   #1102
fishski13 is offline fishski13  United States
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Default simple Gainclone

a simple Gainclone i built for a good friend.

-LM3875 chips soldered P2P with terminal strips and the PS on Vectorbord.
-schematic is per Peter Daniel's of Audiosector.com, with obvious aesthetic influence from PD as well.
-chassis is DIY with sanded aluminum and tung oiled cherry wood.

http://i23.photobucket.com/albums/b3...esHi-Fi001.jpg
http://i23.photobucket.com/albums/b3...hski13/015.jpg
http://i23.photobucket.com/albums/b3...ki13/017-1.jpg
http://i23.photobucket.com/albums/b3...esHi-Fi020.jpg
http://i23.photobucket.com/albums/b3...esHi-Fi002.jpg
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Old 27th May 2009, 11:19 AM   #1103
VLSI is offline VLSI  Australia
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DynacoDave & Mike-Toronto

Thanks for the excellent link.
I worked contract for a loss adjuster some years back and have seen some nasty fires started by Loudspeakers (twice) CRT monitors and TV's (too many) clock radio, electric blanket, ceiling fan. the list goes on.
DC protection is a must for direct coupled amplifiers and try where possible to use transformers with internal thermal fuses, also despite some commercial manufactures not earthing equipment, Good earthing is a must for all DIY projects!
I have built 10+ chip amps and all but one (no longer used) have DC speaker protection.

Regards Greg
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Old 30th May 2009, 03:58 PM   #1104
jinx is offline jinx  Germany
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this is my masterpiece.
i'm just waiting for another transformator, but then it's finished.


http://666kb.com/i/b9dav51pyhae3fhfd.jpg

http://666kb.com/i/b9davvy8fkmwflp15.jpg

http://666kb.com/i/b9dawdm4j5q4n2lmh.jpg

http://666kb.com/i/b9dawmyyt5t9ww0zd.jpg
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Old 30th May 2009, 04:27 PM   #1105
FastEddy is offline FastEddy  United States
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fishski13: Very nice ...

jinx: Slow loading images, but well worth the weight ...

I love this thread
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Old 31st May 2009, 01:57 PM   #1106
Banfi T. is offline Banfi T.  Hungary
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First attempt to build a minimized Gainclone. I had a relatively small box (30cm x 20cm x 6cm), but I wanted to do a dual mono configuration, so I did.

I am not happy with the internal wiring, I will redo later the circuit probably. Nevertheless, the amplifier works, has almost no noise. (a big suprise for me, seeing how close the transformators are.

Click the image to open in full size.
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Old 31st May 2009, 01:59 PM   #1107
Banfi T. is offline Banfi T.  Hungary
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And a picture a took last night


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Old 2nd June 2009, 04:33 PM   #1108
Alchamist is offline Alchamist
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hi,

This is my chipamp.Buffer designer pedja rogic you know and the regulator and general amplifier designer dxvideo.thanks for dxvideo's helps...
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Old 2nd June 2009, 04:33 PM   #1109
Alchamist is offline Alchamist
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Other photo..
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Old 2nd June 2009, 04:33 PM   #1110
Alchamist is offline Alchamist
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The bias current rate is 6mA..
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