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Chip Amps Amplifiers based on integrated circuits

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Old 3rd January 2014, 12:47 AM   #2641
davym is offline davym  Scotland
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Nice build CanAm Man

I have a pair of those boards complete and working with a PSU board too, just need a new enclosure for them since their old one is now a mono block My-Ref FE

Another project I might get around too, they do sound very good but the FE's are like them on steroids so they are in the big cardboard box of possibility's for now. I might put together an amp for the lad out of them when he gets out of the army, that would be nice to do.
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Old 4th January 2014, 10:06 PM   #2642
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Default Hybrid

Last project done.
50W@8ohm and 72W@4Ohm (RMS @1Khz)
LM3886 + ECC83 + 5V4G
Chassis and all is made by me.
I was quit impressed with the performance on this amp, it is nothing I tried before and it plays really clear and open

For those of you that use Facebook can use this LINK to get more pictures.
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File Type: jpg RUNH0824.JPG (529.5 KB, 1048 views)
File Type: jpg RUNH0821.JPG (648.7 KB, 1008 views)
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Old 4th January 2014, 10:45 PM   #2643
bcmbob is offline bcmbob  United States
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OK, I'll admit to being totally confused. Can you walk us through the elements in that build. It looks very intriguing and unique, but more info would be great.
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Old 4th January 2014, 10:56 PM   #2644
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What are you wondering about?
It is quit simple, LM3886 as classic Voltage amplifier working on +-37V and PSU capable of 8amps. 5V4G as tube rectifier for ECC83, working on 180V.
One PCB board for changing in signal, one PCB board for on/off with a PSU on 12V, on/off switch is based on push button and CD4013 for switching relay.
Hope this clarify some of it
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Old 4th January 2014, 11:00 PM   #2645
bcmbob is offline bcmbob  United States
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Yes it does, thanks. I've done several LM3886 projects and didn't understand the integration of the tubes. What is the advantage of the "5V4G as tube rectifier for ECC83"? It's just something new to me. Always wanting and willing to learn.
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Last edited by bcmbob; 4th January 2014 at 11:04 PM.
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Old 4th January 2014, 11:08 PM   #2646
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5V4G is just something I had several laying in around for a long time so why not use it?
I normally build tube amps, this is just something I had to try.
I still have about 10pc of LM3886 in stock and a lot of different tubes, start a new project every winter just for fun.
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Old 4th January 2014, 11:10 PM   #2647
bcmbob is offline bcmbob  United States
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Neat, sounds like fun. Please keep us updated.
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Old 7th January 2014, 10:39 AM   #2648
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Quote:
Originally Posted by Professor View Post
wcleungoo Why three fuses?
The fuse are for the +35, -35 and the MP3 12v.

ciao
wc
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Old 12th January 2014, 09:43 PM   #2649
kuroguy is offline kuroguy  United States
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LM4780 completely DIY, including the front, rear, and top panels.
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Old 12th January 2014, 10:15 PM   #2650
kuroguy is offline kuroguy  United States
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One more better light.
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