Simple summer vacation amplifier :)

Onnimanni · 11th July 2009, 09:25 PM

Hi all diy folks

On my vacation I have build and almost finished building of my new amplifier that is simple and sounds good. It is amplifier that have nothing new around here in diyaudio: Differential cascode LTP, cascoded VAS and CFP output stage. It can output 2x100W@8R. I have biased it on class A till 5W, so it is class AB amplifier. I will show schematics and layout when I have added correct values on them. I designed this amplier in two weeks including designing, so it is not very actually very that good/beautiful.

Here I have few pics from building, but I regret that I didn't take pictures from the start of the building as it was very funny

I will also put IR pictures as long I can borrow that IR-camera from my job.

I wish I could share the sound of this amplifier with you guys. I wish that all of you who is going to build this amp will join this as much as I am enjoying right now.

http://koti.mbnet.fi/dejak/Kes%e4lomavahvistin

jaycee · 11th July 2009, 09:54 PM

Looks well designed. Nice use of SMD parts

Lots of capacitance too! I guess you got many 2200uF (guessed the value) capacitors as cheap surplus or so ?

Onnimanni · 12th July 2009, 04:09 PM

Yes, those capacitors are Nichicon 50V/2200uF capacitors. They were supposed to be in RC filter but because I runned out of space I'd had to leave RC-RC -filter out. 24X2200uF is better than my previously amplifier that were running on 0,5F capacitance.

This amplifier have VERY good dynamics. I believe that is it because of cascode/CFP.

11th July 2009, 09:25 PM	#1
Onnimanni diyAudio Member Join Date: Dec 2008	Simple summer vacation amplifier :) Hi all diy folks On my vacation I have build and almost finished building of my new amplifier that is simple and sounds good. It is amplifier that have nothing new around here in diyaudio: Differential cascode LTP, cascoded VAS and CFP output stage. It can output 2x100W@8R. I have biased it on class A till 5W, so it is class AB amplifier. I will show schematics and layout when I have added correct values on them. I designed this amplier in two weeks including designing, so it is not very actually very that good/beautiful. Here I have few pics from building, but I regret that I didn't take pictures from the start of the building as it was very funny I will also put IR pictures as long I can borrow that IR-camera from my job. I wish I could share the sound of this amplifier with you guys. I wish that all of you who is going to build this amp will join this as much as I am enjoying right now. http://koti.mbnet.fi/dejak/Kes%e4lomavahvistin

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11th July 2009, 09:54 PM	#2
jaycee diyAudio Member Join Date: Apr 2004 Location: Norwich, UK	Looks well designed. Nice use of SMD parts Lots of capacitance too! I guess you got many 2200uF (guessed the value) capacitors as cheap surplus or so ?

12th July 2009, 04:09 PM	#3
Onnimanni diyAudio Member Join Date: Dec 2008	Yes, those capacitors are Nichicon 50V/2200uF capacitors. They were supposed to be in RC filter but because I runned out of space I'd had to leave RC-RC -filter out. 24X2200uF is better than my previously amplifier that were running on 0,5F capacitance. This amplifier have VERY good dynamics. I believe that is it because of cascode/CFP.

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