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View Full Version : New DIY class A amp.



matsj
09-09-2007, 11:23 AM
I must show my new Class A amp. A friend of mine and i put it together today and it sounds amazing and with no hum and noice. I get 6 watt of it and itīs perfect to my drivers. Iīm going to make 5 mono amps to my new project K2/ array speakers.

Pictures of it.

mats

timc
09-09-2007, 11:30 AM
Eh.....6watts for a K2/Array?

and what is the 5th amp for? Just curious ;)

Best regards Tim

matsj
09-09-2007, 11:37 AM
The class A amp is only for the 2435hpl driver and for my Le14h-3 i have Crown K2.
Itīs a Ht 5.1

mats

timc
09-09-2007, 11:39 AM
Aha :)

Then i understand.

Btw. I also use a Crown K2 for my L65's It kicks butt.

I think ill try to make one of thoose amps myself. What is that IC on the schematics?

Best regards Tim

matsj
09-09-2007, 11:46 AM
Lm317T power regulator , Elfa nr 73.120-77.

Try one, no big money.

mats

timc
09-09-2007, 11:49 AM
Lol...your from sweden. Didnt notice until now :)

Tjena!

What is the power disipation of that amp? Have to check if i have a heatsink lying around...

Greetings from the west.

matsj
09-09-2007, 11:55 AM
12 watt for a mono. I think i can use one of my 300x200x40 mm heatsink for 5 channel amp.

Where in norway do you live tim ?

mats

timc
09-09-2007, 12:03 PM
Hi.

I live in Trondheim atm.

Best regards Tim

Thom
09-09-2007, 12:24 PM
317's are beautiful. If you overload them they shut down. If you overheat them they shut down. This allows them to be an over temp protector for anything on the same heatsink. They don't see the full voltage they regulate so they can regulate quite high voltage. The can be found for less than a $1.00. They are quite marvelous.

timc
09-20-2007, 01:10 PM
Where did you get the Buz71? Cant find it on ELFA. You have an alternative Transistor?

Best regards Tim

matsj
09-20-2007, 01:13 PM
For a week ago i went to metal and electronic junkyard and i got a hole box of capacitors to my experiments for 3 dollars . I have tried to make them ready but i work to many hours right now.

mats

matsj
09-20-2007, 01:19 PM
A friend of mine have a some of them ( 300-400 ) :).

mats

timc
09-20-2007, 01:23 PM
Nice.

Would it be possible to buy a few pairs you think?

Best regards Tim

rs237
09-20-2007, 01:24 PM
hello mats,

please look my post at the "Amplifier for 2435hpl drivers ? " thread.

regards
juergen

matsj
09-20-2007, 01:28 PM
Allready done juergen.
I can send you some Tim. PM me adress.

mats

timc
09-20-2007, 01:33 PM
Allready done juergen.
I can send you some Tim. PM me adress.

mats


Thats just fantastic! Have sent you PM.

Thanks a lot.

Best regards Tim