03-03-2015, 10:39 PM
Well, that is no longer the power. Or does not seem so.
1. Is this the same Q11/12 or the output?
2. What is the V/div scale?
3. Can you show output if this one is not?
4. How does the signal look at Q11/13 inputs AND outputs?
This looks a bit like clipping (which is normal). You nee to see if the amp has proper gain and can give undistorted signal when given the input of the noramlized input max (usually about 250mV).
And try to see at what level it starts dstorting, and if both channels do it alike.
Poke around. It is quite possible you are OK. Especially if both channels are doing the same.
BTW the power voltage should sag just a tad under large signal, it is normal. A larger filter cap would diminish this effect.
1. Is this the same Q11/12 or the output?
2. What is the V/div scale?
3. Can you show output if this one is not?
4. How does the signal look at Q11/13 inputs AND outputs?
This looks a bit like clipping (which is normal). You nee to see if the amp has proper gain and can give undistorted signal when given the input of the noramlized input max (usually about 250mV).
And try to see at what level it starts dstorting, and if both channels do it alike.
Poke around. It is quite possible you are OK. Especially if both channels are doing the same.
BTW the power voltage should sag just a tad under large signal, it is normal. A larger filter cap would diminish this effect.
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
![[-]](https://philcoradio.com/phorum/images/bootbb/collapse.png "[-]")
