Attachments
Thank You very very much.
Amp looks rock solid construction. I am waiting for all parts arive to complete it.
Thanks again
post2041.
You really need to compare input signal to output signal using a dual beam or dual trace scope. (dual beam are quite rare).
You really need to compare input signal to output signal using a dual beam or dual trace scope. (dual beam are quite rare).
The input signal is a pure exactly square wave with 0.8V approx. as shown in Fig. with 1kHz.
The differences in output are the slope with increasing frequency, and the small peaks at the corners (see picture).
What else can we see, phase shift?
I can do it again if required. The oscilloscop is for dual-measuring.
regards Olaf
Attachments
Yes, you and we need to see the input signal to allow comparison with the output signal.
If the input has overshoot and this is mimicked in the output, but you don't show us the input, we could be mislead into thinking the amplifier is adding the overshoot.
You must be unbiased in how you present the information.
If the input has overshoot and this is mimicked in the output, but you don't show us the input, we could be mislead into thinking the amplifier is adding the overshoot.
You must be unbiased in how you present the information.
The input has a slightly rounded corner to the squarewave and no evidence of overshoot that I can see.
The output clearly shows overshoot and slew rate.
Are your probes adjusted to show squarewaves correctly?
The output clearly shows overshoot and slew rate.
Are your probes adjusted to show squarewaves correctly?
This is input if Amp has no power. The peaks on input come from the amplifier.
Attachments
Now I changed all 330p to 100p. Slew rate is better as expected.
(10 + 20kHz). I hope, the probes are correct, but 20cm wire.
regards
(10 + 20kHz). I hope, the probes are correct, but 20cm wire.
regards
Attachments
Last edited:
This latest pic looks different from the previous input.
Have you swapped scope probes?
I ask again
Have you swapped scope probes?
I ask again
No, I did not swapped the probes. But I changed the Cap at input from 330 to 100p.
It looks like a better slew rate but a bit more overshoot. But I have no particular experience.
regards Olaf
It looks like a better slew rate but a bit more overshoot. But I have no particular experience.
regards Olaf
Have you seen the input without amplifier? Looks good.
If amp is connected, input has peaks?!
reegards Olaf
If amp is connected, input has peaks?!
reegards Olaf
I like the Apex AX11, and this is not foreign to me because it is similar to the scheme Sansui AU217
Greetings Denmas.
Greetings Denmas.
