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Chip Amps Amplifiers based on integrated circuits

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Old 28th August 2006, 02:47 PM   #111
luka is offline luka  Slovenia
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yes I am using 3525 in car,
Ok I'll look output with scope again.
I am not happy with the spikes on output, but I dont tkink I can hear any of them. they are some 0.5vp high or so.
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Old 1st September 2006, 09:31 PM   #112
dab is offline dab  United States
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Default The Beatles Tin Amp

My, "BEATLE TIN AMP"
A Four channel stereo bi-amp run from a 30V battery source'

Click the image to open in full size.
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Old 1st September 2006, 09:31 PM   #113
dab is offline dab  United States
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Default The Beatles Tin Amp

My, "BEATLE TIN AMP"
A Four channel stereo bi-amp run from a 30V battery source.
Passive crossover at 500hz, Each pot controls a different channel.
Has Zobels, " the big resisters"
Modified many times.

This Beatle Amp is a Dead Bug Amp! , Get It?
Pun

The InsideClick the image to open in full size.
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Old 16th September 2006, 10:34 PM   #114
jaycee is offline jaycee  United Kingdom
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My own "Gainclone":

http://www.darkmatter.myby.co.uk/pro...images/all.JPG

I bought the case on eBay which had some type of power supply (500VA toroid!) and control processor in it. Unfortunately the toroid wasn't suitable. The back panel is nasty thin metal that I happened to have lying around, I plan to replace this soon with a piece of the same 1.5MM metal that makes up the front panel.

As you can see, there is a set of 4 input jacks on the back. I plan to add a preamp and input select circuit to this soon. The transformer is some unit I had lying around that puts out 25-18-0-18-25. It is under rated but is OK for the low volumes that the amplifier is currently used for. I will be replacing it with a 225VA 18-0-18 transformer soon.

The capacitors are 4x4700uF 63V BHC Aerovox capacitors that I aquired cheap on eBay.
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Old 17th September 2006, 01:36 AM   #115
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DAB i hope thats not the beatle tin thats worth $2000 on ebay

anyways its very cool, nice job!
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Old 3rd October 2006, 07:12 PM   #116
lgreen is offline lgreen  United States
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Default My Chipamps

Here are my chipamps-

LM3886 Chipamp with differential input

"Sparky" the LM4780 Chipamp in the "parallel" configuration.

Both work and sound good, though they don't look pretty on the inside!
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Old 3rd October 2006, 09:06 PM   #117
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Default LEDS

John,

Have you thought about getting professional help with this obsession you have with blue LED's?



They look good mate.


Brett
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Old 3rd October 2006, 09:19 PM   #118
lgreen is offline lgreen  United States
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Default Re: LEDS

Quote:
Originally posted by enzedone
John,

Have you thought about getting professional help with this obsession you have with blue LED's?



They look good mate.


Brett
I likeee them like that! Now that i'm started down the path everything has to match, and one problem is that I have a bag of 100 to use up. But note that the last amp only has 1 blue led in the whole thing, so i'm getting better. Plus the preamp is causing me to go blind.
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Old 3rd October 2006, 09:24 PM   #119
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Mr Blue,

what's the verdict on Sparky ?
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Old 3rd October 2006, 09:25 PM   #120
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Default Preamp

Just sent you an email regarding pre amps.
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