4watt classic OTL amp...

DarkHorse

Member

Joined 2005

2006-08-27 1:49 pm

#1

• 2006-08-27 1:49 pm

• #1

😀
I have draw this schematic today,very simple things:

 

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DarkHorse

Member

Joined 2005

2006-08-27 1:54 pm

#2

• 2006-08-27 1:54 pm

• #2

by adjusting RP2 to more small value,you can increase the biasing of output stage.make it up to 20mA~30mA is suitable.

 

DarkHorse

Member

Joined 2005

2006-08-27 3:10 pm

#3

• 2006-08-27 3:10 pm

• #3

one mistake I make,V1 should be DC32V if you want the circuit can ouput 4W(RMS),Using DC25V you can only get about 2.6W(RMS),sorry for this!

Enjoy it!
WINCO🙂

 

MikeB

Member

Joined 2004

lf-pro.net/mbittner/Sym5_Webpage/symasym5_3.html

2006-08-27 4:09 pm

#4

• 2006-08-27 4:09 pm

• #4

Hmm, you write "no global NFB", but i see gnfb over R10/RP1 ???

Mike

 

W

wojtek5001

Member

Joined 2005

2006-08-27 6:16 pm

#5

• 2006-08-27 6:16 pm

• #5

No global NFB?

There is a global NFB through R10 and R11. If You bypass RP1 by capacitor (for example), there will be no global NFB. Anyway, nice schematic😉

 

DarkHorse

Member

Joined 2005

2006-08-28 1:54 am

#6

• 2006-08-28 1:54 am

• #6

there just DC NFB when input end has no resistor,haha...

 

Leolabs

Member

Joined 2004

2006-08-28 3:32 am

#7

• 2006-08-28 3:32 am

• #7