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Chip Amps Amplifiers based on integrated circuits

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Old 21st July 2011, 04:03 PM   #1851
udailey is offline udailey  United States
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Agreed. Build a B1 or DCB1 but B1 is easier and still very very good.
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Old 21st July 2011, 07:27 PM   #1852
jemraid is offline jemraid  United Kingdom
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Hello all,

I recently completed my NIGC in a plywood box, 300VA 12v, CarlosFM caps plus snubbers and P2P LM1876;

Click the image to open in full size.

Click the image to open in full size.

Previously in 2004 I made Thorsten's IGC and I was able to do a direct comparison, IGC thin and not very detailed, NIGC rounded, warm, very detailed and with a huge dynamic range.

I just finished mods to a CD723 as well and am now going to listen to my collection for the 'first' time.

My thanks to everyone whose posts I have gleaned the knowledge to do this from.

Jim
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FH3 build using very simple tools and a point to point Gain Clone with largish power supply. http://www.jasread.com/fh3/index.html
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Old 21st July 2011, 09:40 PM   #1853
Pato666 is offline Pato666  Argentina
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jemraid: I simply love that design, I've seen your other projects in your website.. simply great!
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Old 21st July 2011, 10:34 PM   #1854
jemraid is offline jemraid  United Kingdom
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Dear Cristian,

That's very nice of you to say so, especially as you are one of the people I've to thank for sharing your technical expertise.

Cheers - Jim
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FH3 build using very simple tools and a point to point Gain Clone with largish power supply. http://www.jasread.com/fh3/index.html
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Old 22nd July 2011, 03:46 AM   #1855
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Thought I'd add my pics of my latest project I just finished. It a tube driven TDA7294 chip amp built from a Chinese eBay kit. I used two identical 24 volt transformers I've had sitting around forever. One for positive voltage and one for the negative, center tapped externally, and a Rat Shack tranny to power the tube. I replaced the Chinese tube with a NOS 5670WA. I used a dead Sony receiver for the case and built a simple front end out of cedar board. I used one of those fake ALP's stepper pots for the volume control. The amp can be driven to ear bleeding levels straight from a CD or phono preamp without a preamp. I'm probably going to drive it with a old NAD 1300 preamp ,I'm restoring, so I can use more than one input at a time, until I build a tube preamp to go with it.
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Old 23rd July 2011, 01:00 AM   #1856
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Hi jemraid.

Have you got a fuse in your mains wiring?

John
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Old 23rd July 2011, 02:22 AM   #1857
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Here's my second set of myref
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Old 23rd July 2011, 08:29 AM   #1858
jemraid is offline jemraid  United Kingdom
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Dear John,

Yes there's a 3 Amp fuse in the 13 Amp Plug top.

Regards - Jim
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Old 29th July 2011, 10:15 AM   #1859
rhr9 is offline rhr9  France
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Default Gainclone LM3875

Hi ,

Here are some pictures of my Gainclone LM3875 , powered wirh 4 SMPS .

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Click the image to open in full size.

@ + Philippe.
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Old 29th July 2011, 11:35 AM   #1860
AndrewT is offline AndrewT  Scotland
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Who tells us the PSU is not bigger than the amplifier?
Here's an excellent example showing that the PSU must not be skimped.
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