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Old 23rd August 2008, 03:30 PM   #1
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Default Worlds smallest amp?

Now when my two monoblocks are in the workshop being converted into HEC high performance units (hopefully) I have no sound at home! Terrible! So, I decided to solve this as quickly as possible. At least I have to be able to watch TV with sound.

Result: 2 bridge mode IC amps and a switching power supply.

Sounds good right? Mohohaohaaaaaa......

Well, the supply is an old cell phone charger...and the amps are TDA7052s putting out a staggering 2 x 1 watts......
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Old 23rd August 2008, 04:27 PM   #2
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I think there is room for a Votexion Tape Recorder between the two amps!!!
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Old 23rd August 2008, 04:44 PM   #3
gni is offline gni  United States
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Classic DIY. . . reuse them parts!
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Old 23rd August 2008, 06:55 PM   #4
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Small enough to smuggle inside a body cavity! Excellent work.
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Old 31st August 2008, 08:20 AM   #5
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That inspired me to shrink a TDA7294.
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Old 31st August 2008, 09:00 AM   #6
lineup is offline lineup  Sweden
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can i be done much smaller

yes, of course

SMD Version of some common dual op-amp = left and right channel
+ SMD resistors and two eventual SMD output buffer transistors
Such transistors can come in e.g. D2-PAK
which can take a few watts, even without heatsink.

What sabotage it all are those GIGANTIC RCA Phono
The ouput connector may be hardwire
because normal loudspeaker terminals
would look like World Trade Center beside a normal house.

More reading:
Surface-mount_technology#Package_sizes
http://en.wikipedia.org/wiki/Surface...#Package_sizes

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Old 31st August 2008, 10:00 AM   #7
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This made me remember a very small construction from the days I worked as a TV repair technician. There was a Sharp set about 10 years ago that used a OP based class D amp with SMD output transistors! Provided about 10 watts, but with terrible distorsion figures.

But it could be a way of building an extremely small amp with decent power!

I was the Sharp 70CS03 bt the way. LF output stage attached.
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Old 31st August 2008, 06:09 PM   #8
lineup is offline lineup  Sweden
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okaey
your amplifier is the smallest so far, Rickard
Congrat

But you wait some days/weeks .....
I'll be back with MY pictures
of some thing even smaller
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Old 31st August 2008, 10:42 PM   #9
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Now if you want to talk small, ask my wife!!! or you can make a crystal set small enough to fit on a thumb nail (less earpiece), and if you think it is cheating because of the earpiece you can listen very carfully to the crystal, and all you need is a crystal diode and a tiny bit of coiled wire. But give the dude credit, it is small; damned phono sockets; They spoil everything small. Cheers Barry
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Old 31st August 2008, 11:23 PM   #10
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I been tryin' to work up the nerve to try to solder these Max9703s

Click the image to open in full size.

I tinned one board, but it looks ugly ugly.

w
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