My BIG (2x 1.2kW) amp

[skaara]

I used two 2kW / 2x74V AC trafos which give me about +- 105V rails when rectified and with 80000µF capacitors.
It has 20 output transistors per channel.

It weights about 50-60kg and I its very hard/impossible for one man to carry it around (i once carried it 2 floors down and it was very painful). Its measures are: 48cm wide, 20cm high, 70cm deep

The amplifier was tested with sinus signal with loads down to 2 ohm, it gives:

2x 650W RMS @ 8 ohms
2x 1.2kW RMS @ 4 ohms
2x 2kw RMS @ 2 ohms - after 1 hour of full power in that load it becomes very hot:>


Here are the pictures taken at my friends place when we were preparing stuff for the party.. Unfortunately we couldnt get more speakersD


http://www.elektro-n.com/forum2/attachment_mod.php?download=1216
http://www.elektro-n.com/forum2/attachment_mod.php?download=1217
http://www.elektro-n.com/forum2/attachment_mod.php?download=1218
http://www.elektro-n.com/forum2/attachment_mod.php?download=1219
http://www.elektro-n.com/forum2/attachment_mod.php?download=1220
http://www.elektro-n.com/forum2/attachment_mod.php?download=1221
http://www.elektro-n.com/forum2/attachment_mod.php?download=1222



Now I want to make a class D amp of that power and smps for it, but until this will happen.... any ideas?

 

[bigparsnip]

looks good, any chance of a peek inside of it?

 

[john-china]

i want to see nude .

 

[JojoD818]

nude??? you mean the amp right in that case, me too...

JojoD

 

[jleaman]

How do you expect to pull 2kw through that little DINKY power cord. ?

 

[jleaman]

WOOO a carton of smokes that will make it smoggy in there.

COUGH COUGh. id never want to be in there ..

 

[subwo1]

Hi skaara,

See the link at the bottom of this post for ideas on high power SMPS. Also see http://www.diyaudio.com/forums/showthread.php?goto=newpost&threadid=14847

 

[UrSv]

How do you expect to pull 2kw through that little DINKY power cord. ?

Probably a standard 10 A cord which means at least 2.4kW here in 240 V Europe. running things a bit high he could probably get that through without too much of a problem.

 

[thylantyr]

inside pics ?

people drool

 

[matth]

Looks great, I really like the heatsink layout.
I thought my amp was heavy with 2 x 1Kva tranfos in it but 2 x 2Kva

Come on give us some pics of the guts.

What your mains supply? 2 x 2Kw means over 16.5 Amps even at 100% efficiency on 240v. That cable is rated at 10 Amps max and the inlet on the amp is probably only 6 Amps. I thought I was pushing it on my amp.
You may want to try the large IEC connectors rated at 16 Amp:
RS: 16amp

 

[skaara]

At the time i was doing the pics it wasnt really the time to open it, but i promise you ill make some the next time i get digital photo again.

Yes im using 10A/16Amax power cord, it gets "warm" after i run the amp at full power for a long time, but it works.. i know i have to get better/proper one at some point.. The inlet to which was connected was rated 25A.

 

[Samuel Jayaraj]

Any chance of sharing the schematic diagram with us folks on the forum.

 

[Matttcattt]

DROOL

I Like

Any chance of a circuit diagram?

Any chance of some inside pictures?

DROOL agian