Worlds ugliest chipamp

Tekko · 10th October 2010, 01:07 PM

This must be the uglist chipamp in existance:

video:
YouTube - Ugly 2.1 channel amplifier

jamal · 10th October 2010, 01:13 PM

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

nightanole · 10th October 2010, 01:14 PM

at least he cleaned the flux off...

udailey · 10th October 2010, 01:16 PM

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

Tekko · 10th October 2010, 01:19 PM

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 · 10th October 2010, 01:38 PM

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 · 10th October 2010, 01:57 PM

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 · 11th October 2010, 12:17 PM

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

Circlotron · 11th October 2010, 12:58 PM

Looks no worse then the inside of a Gaincard.

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

Tekko · 11th October 2010, 01:29 PM

Schematic:

10th October 2010, 01:07 PM	#1
Tekko diyAudio Member Join Date: Jan 2005	Worlds ugliest chipamp This must be the uglist chipamp in existance: video: YouTube - Ugly 2.1 channel amplifier

10th October 2010, 01:16 PM	#4
udailey Passive Aggressive diyAudio Member Join Date: Mar 2008	I think its up for the award of "most likely to die in a puff of smoke"! __________________ You can purchase LDRs anytime to build a standard LDR attenuator or to build my new LDR Attenuator "A Lighter Note". Email me. diyldr@gmail.com

11th October 2010, 12:58 PM	#9
Circlotron diyAudio Member Join Date: Jun 2002 Location: Melbourne, Australia	Looks no worse then the inside of a Gaincard. http://sound.westhost.com/mad-f1.jpg __________________ Best-ever T/S parameter spreadsheet. http://www.diyaudio.com/forums/multi...tml#post353269

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10th October 2010, 01:13 PM	#2
jamal diyAudio Member Join Date: Sep 2010	I am going to build something more ugly than yours.hehehe

10th October 2010, 01:14 PM	#3
nightanole diyAudio Member Join Date: Feb 2009	at least he cleaned the flux off...

10th October 2010, 01:19 PM	#5
Tekko diyAudio Member Join Date: Jan 2005	Its 3 channels, two LM1875 and a sub channel with two paralleled TDA7293. All driven from a modified amiga 500 power supply outputting 2x23VDC.

10th October 2010, 01:38 PM	#6
jamal diyAudio Member Join Date: Sep 2010	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

10th October 2010, 01:57 PM	#7
Tekko diyAudio Member Join Date: Jan 2005	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.

11th October 2010, 12:17 PM	#8
jamal diyAudio Member Join Date: Sep 2010	hi, if it is nice, I be very glad if you can share the circuit here....thanks

11th October 2010, 01:29 PM	#10
Tekko diyAudio Member Join Date: Jan 2005	Schematic:

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