Need help on 100w Amplifier

rambo99

Apr 24, 2011
63
Joined
Apr 24, 2011
Messages
63
I am no longer post on this web site I got no help
 
Last edited:

Harald Kapp

Moderator
Moderator
Nov 17, 2011
14,271
Joined
Nov 17, 2011
Messages
14,271
I'm sorry, maybe it's because I'm not a native speaker but this
I have a 100w Amplifier made the pcb and all the parts when I add the power one of the 3.3k resistor put meter across the resistor was 90v as for the power supply has a 52 v rail and 55v rail the resistor would had burn out if I left the power on so I replace it and all the TO92 transistor so far every thing is ok but when I put the 2 x 220R 5w resistor where the fuse go for the quiescent current 20ma it had to be 4.4v when I adjust the VR1 when the pot adjust clockwise al I got is 2v and for 2 min it when to 1.5v could not get 4.4v the pot had to go Anticlockwise fror the out put less than check for 30mV it was 0.6mV out put
single sentence doesn't make any sense at all to me. Please help us understand the meaning of this:
- What do you measure?
- Where do you measure (name the components and nets)?
- What do you expect or stated differently: what is the deviation of your measured results from the expected results?

Harald
 
Top