Worlds ugliest chipamp

[Tekko]

This must be the uglist chipamp in existance:

video:
YouTube - Ugly 2.1 channel amplifier

 

[jamal]

I am going to build something more ugly than yours.hehehe

 

[nightanole]

at least he cleaned the flux off...

 

[udailey]

I think its up for the award of "most likely to die in a puff of smoke"!

 

[Tekko]

Its 3 channels, two LM1875 and a sub channel with two paralleled TDA7293.

All driven from a modified amiga 500 power supply outputting 2x23VDC.

 

[jamal]

hi Tekko, I was using TDA7294 to power a sub. how is the TDA7293 performance. can you tell us more about your power supply and its current rating.....thanks bro

 

[Tekko]

Its safe to say that the transformer in the amiga psu is MAX 100VA so i'd say 2.5-3A tops.

The TDA7293 seem to be performing well all way down to just a few Hz, the feedback cap is 270µF and input dc blocking is 1µF, i also have a passive lowpass filter on it and passive highpass filters on the stereo channels that cross around 90Hz.

 

[jamal]

hi, if it is nice, I be very glad if you can share the circuit here....thanks

 

[Circlotron]

Looks no worse then the inside of a Gaincard.

http://sound.westhost.com/mad-f1.jpg

 

[Tekko]

Schematic:

 

[pikkujöpö]

Looks no worse then the inside of a Gaincard.

http://sound.westhost.com/mad-f1.jpg

Gaincard ,wrong picture maybe

The cuts in that picture are from Final labs music-6

 

[jamal]

Tekko it said that by putiing a 20pf capacitor parallel with the feedback resistor. you get better roll off freq.

 

[uzernaam]

You know what I'd do with that thing? Once I checked that it operated and that there were no bare-wire shorts anywhere, I'd put the whole thing in a bucket, and pour two-part high-temperature clear epoxy over the whole thing, with only the heatsink sticking out. Then I'd carve into it with a chainsaw to carve out the amplifier as one solid block, then sand the sides flat with finer and finer sandpaper, then wet sand it for a mirror-smooth surface.

Call it a work of modern art.

 

[Circlotron]

Gaincard ,wrong picture maybe

The cuts in that picture are from Final labs music-6

Oh yeah. Whoops!

 

[random007]

Just don't trip over any cables it's plugged into or it'll turn inside out like some 1970s handicraft based party trick

 

[jamal]

hey, show us the picture..............thanks

You know what I'd do with that thing? Once I checked that it operated and that there were no bare-wire shorts anywhere, I'd put the whole thing in a bucket, and pour two-part high-temperature clear epoxy over the whole thing, with only the heatsink sticking out. Then I'd carve into it with a chainsaw to carve out the amplifier as one solid block, then sand the sides flat with finer and finer sandpaper, then wet sand it for a mirror-smooth surface.

Call it a work of modern art.

 

[markcrenz]

You know what I'd do with that thing? Once I checked that it operated and that there were no bare-wire shorts anywhere, I'd put the whole thing in a bucket, and pour two-part high-temperature clear epoxy over the whole thing, with only the heatsink sticking out. Then I'd carve into it with a chainsaw to carve out the amplifier as one solid block, then sand the sides flat with finer and finer sandpaper, then wet sand it for a mirror-smooth surface.

Call it a work of modern art.

I'd love to see the finished product.

 

[merlin2069er]

Well, as long as you put a case around it nobody can tell.