A question about an amp

[tessier]

Hi

There is 100 nf capacitor across the emiter resistors of the output transistors.

Is those capacitors are another type of suckout capacitors ?

Thanx

Paul

 

[nigelwright7557]

Your circuit diagram has a few mistakes on it.

The LTP output is shorted to B+ for starters.

 

[tessier]

Hi

Yes, it's shorted to B+ because the 5K6 resistor are in the wrong place.

I did not made that circuit.

But I ask the question, not to build this amp, but to know about the fonctions of the 100 nf capacitor across the emiter resistors of the output transistors.

Thanx

Paul

 

[nigelwright7557]

Its very rare to see those capacitors there.

I cant see they are doing very much in parallel with such a small value resistor.

 

[tessier]

Hi

It's first time I seen those capacitors there, where did you seen those in another circuit ?

Can it act as a suckout cap to reduce the output transistors switching noise ?

Thanx

Paul

 

[richie00boy]

It's the base that needs charge sucking out from it. I've no idea what those caps are doing there, sometimes you just see designs with stupid random things.

 

[tessier]

Hi

Yes, there is two types of suckout capacitors that I know, a capacitor across the resistor between the emiter of the two drivers transistors, and the other type are a capacitor across the base stopper resistor of the output transistors.

Thanx

Paul

 

[bobodioulasso]

Compensate the inductance of a wounded resistor?