faust

Hello!I am at the begining in constructing..i would like to make a power ampl.
with this specifications:

Vin 10mV/600Ω, 20W/ 8Ω, class Α , frequency 100-10000Hz.
If you could help it would be great.. Thanks for ur time!

Leftyretro

20 watts rms using class A is going to be expensive and generate lots of heat. A modern class A/B amp of the same power rating would be much more practical and you will not be able to hear a diffence in sound if your honest.

Larry

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Measurement changes behavior

mneary

Here's a website where they seem to be fascinated with class A.

http://www.passdiy.com/amps.htm

audioguru

A bandwidth of only 100Hz to 10kHz is almost as lousy as an AM radio.
No bass and no sizzling highs.

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Uncle $crooge

da costa lima

Hi guys i need to build a simple circiut that can show switching response time in the relays that has got base timers in them ,and also check all contacts of the relay and its coil for funtionality.

faust

Thanks everyone for the answers that gave me,but the problem with that circuit is that is a projekt that i have..so i must stick woth the characterisitcs that that they have gave me..

audioguru

What circuits are needed for the specified amplifier:
1) 600 ohm input impedance.
2) Enough voltage gain so that 10mV input produces 20W output into 8 ohms.
3) Class-A.
4) Attenuate frequencies below 100Hz.
5) Attenuate frequencies above 10kHz.
6) A power supply for it.
7) Cooling for it.

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Uncle $crooge