Worlds smallest amp?

Rikard Nilsson · 23rd August 2008, 03:30 PM

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 TDA7052´s putting out a staggering 2 x 1 watts......

barry.childs · 23rd August 2008, 04:27 PM

I think there is room for a Votexion Tape Recorder between the two amps!!!

gni · 23rd August 2008, 04:44 PM

Classic DIY. . . reuse them parts!

EmergencyDpt · 23rd August 2008, 06:55 PM

Small enough to smuggle inside a body cavity! Excellent work.

danielwritesbac · 31st August 2008, 08:20 AM

That inspired me to shrink a TDA7294.

lineup · 31st August 2008, 09:00 AM

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

Lineup

Lineup Audio Members Blogs

Lineup Audio Community Projects

Rikard Nilsson · 31st August 2008, 10:00 AM

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.

lineup · 31st August 2008, 06:09 PM

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

barry.childs · 31st August 2008, 10:42 PM

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

wakibaki · 31st August 2008, 11:23 PM

I been tryin' to work up the nerve to try to solder these Max9703s

I tinned one board, but it looks ugly ugly.

w

23rd August 2008, 06:55 PM	#4
EmergencyDpt diyAudio Member Join Date: Jul 2008	Small enough to smuggle inside a body cavity! Excellent work. __________________ Don't eat mud, if you can help it. www.EmergencyDpt.com

31st August 2008, 09:00 AM	#6
lineup diyAudio Member Join Date: Dec 2005 Location: the north	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 Lineup Lineup Audio Members Blogs Lineup Audio Community Projects __________________ lineup

31st August 2008, 06:09 PM	#8
lineup diyAudio Member Join Date: Dec 2005 Location: the north	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 __________________ lineup

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23rd August 2008, 04:27 PM	#2
barry.childs diyAudio Member Join Date: Jun 2008 Location: Lostwithiel, Cornwall	I think there is room for a Votexion Tape Recorder between the two amps!!!

23rd August 2008, 04:44 PM	#3
gni diyAudio Member Join Date: Sep 2006	Classic DIY. . . reuse them parts!

31st August 2008, 10:42 PM	#9
barry.childs diyAudio Member Join Date: Jun 2008 Location: Lostwithiel, Cornwall	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

31st August 2008, 11:23 PM	#10
wakibaki Banned Join Date: Jan 2008 Blog Entries: 2	I been tryin' to work up the nerve to try to solder these Max9703s I tinned one board, but it looks ugly ugly. w

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