Chip Amp Photo Gallery

[Pato666]

There are always leftovers and spare parts, but you NEVER have spare transformers, big caps or heatsinks at least in my case.

ha ha ha, that's true!!! my case too

 

[apoopoo999]

I have 5 transformers sitting in the corner
(not small ones either, big hefty 700va ones)

 

[danzrose]

integrated GC lm3886 with OP2134

this is another GC..

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[mjf]

lm1875........testing the "cheap amp" . playing music. it works.

 

[tigersilver]

LM3886- 6 CHANEL

 

[discrete]

this is another GC..

An externally hosted image should be here but it was not working when we last tested it.

A heat sink is only a sink until it reaches the temperature of the heat source. It needs to exchange that heat with cooler air to continue functioning as a heat sink.

You will be better getting rid of those heat sinks and just bolting the chips directly to the chassis walls (assuming the walls are > 4 mm aluminium). This gives a chance for the heat to get out of the box and not cook your capacitor bank.

Even venting the chassis will not help, as the heat sinks are installed horizontally instead of vertically, thereby preventing natural convection.

 

[udailey]

You will be better getting rid of those heat sinks and just bolting the chips directly to the chassis walls (assuming the walls are > 4 mm aluminium). This gives a chance for the heat to get out of the box and not cook your capacitor bank.

Even venting the chassis will not help, as the heat sinks are installed horizontally instead of vertically, thereby preventing natural convection.

Agreed. Bolt to the side or put the sinks on the outside and drill some holes to mount chips on the sink. Even just mounted on the outside with no holes would help more.

 

[linuxworks]

speaking of ventillation, is there any at the bottom? top is great, when you add it; but a lot of people don't add any on the bottom. air comes in from the bottom if you allow it..

 

[troystg]

A couple of holes on the bottom in the back and a couple in the front on the top will give convection through this horizontal sinks and back to front cooling to keep the equipment rack cool.

 

[linuxworks]

formulate_post("yo dawg", "heatsink on a heatsink");

(sorry)

 

[bdos]

TDA 7293

15 watt per chanel

 

[Professor]

Hi! finally I have completed my prototype of the amplifier!

 

[Oery]

nice work....
congrat...........

 

[Prophetmaster]

Hi! finally I have completed my prototype of the amplifier!

2XLM3886 in each channel, connected in parallel?
Nice case

 

[Professor]

2XLM3886 in each channel, connected in parallel?
Nice case

Yes, PA-100

 

[Rainwulf]

There are my amp using STK audio modules, I think that sounds very well.

Did you decap a STK module? Wow, please tell me more about that!
I had some STK modules a while ago, but their distortion figures kind of put me off, then i discovered LM3875/LM3886 chips and havent looked back.

 

[johny74656]

My new amp

Hey, I should have a new one for you shortly. It's my first attempt and includes:
- 2x TDA7294 amplifier module
- headphone amplifier (redcircuits schematic, not installed yet)
- ~200W flyback SMPS with TOP249

It's a work in progress and a little crowded inside, but as far as I can tell, both speaker and headphone amplifiers sound good.

 

[erikindre]

My new LM3875 chipamp

I finally finished my first amp!
It is based on the LM3875 Amplifier Kit from Audiosector.
I am using a Nuvotem 225VA 18V toroid.

The sound is amazing, and very detailed compared to my old integrated Yamaha amp!

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

An externally hosted image should be here but it was not working when we last tested it.

 

[Pato666]

Very nice and clean design, how does it sound? HAve you thought to add more caps to power supply or that design just fits your needs just the way it is?

(it seems like a dummy question LOL, sorry... )

 

[tommy_o]

I finally finished my first amp!
It is based on the LM3875 Amplifier Kit from Audiosector.
I am using a Nuvotem 225VA 18V toroid.

The sound is amazing, and very detailed compared to my old integrated Yamaha amp!

That is a fantastic case, especially that venting! Where did you find it, if you don't mind me asking?