It seemed to work great for extreme oxidization and not so good for corrosion or left over polish ( a trick from Harold). I was amazed at what it did on the wafers and I am sure it will do the same for selectors.
I think that means the output of the amplifier.I want to check this amp for stability and DrAudio stability check says once you do the square wave and everything is OK hang a .1uf at the output.
Just so that I am sure....do the square wave test 1 volt P to P, is this output of the generator or output of the amp?
No, absolutely not just before clipping - keep the output voltage of the amplifier low. Square waves are a severe test of an amplifier, but can be very revealing if used carefully, i.e. at low levels.Power off, put a .1uf across the red and black speaker binding posts. Power up and check for ringing on the scope. He never says what volume or more precisely voltage to take the square wave to. Do I assume its to just before clipping or is it just a reference voltage you use for the test, say 12v or is it the 1v he speaks of at the beginning.
Yes it will.Other info you may need. My scope is analogue so is it going to pick up this ringing?
Sounds good.I have done the sine wave sweep from 1000-25000 and no voltage increase as I went up and everything looked OK.
My final newby question of the night is what will the ringing look like?
Cheers,
Please let me know your experience on the MC input.
Hi Harold!
I just checked my X1 - and I get zero hum from the Phono 1 input (with an MM cartridge connected) just a little 'hiss' at maximum volume.
With MC input selected on Phono 1 (again with an MM cartridge connected) I get a bit more 'hiss' but no hum.
If I select MC Phono 2 (not connected to anything) - I do get a noticeable hum - but that is with nothing plugged in, and at maximum volume.
I hope this helps.
Rean-Nuetrik and the latter seem to be of good quality.
I want to check this amp for stability and DrAudio stability check says once you do the square wave and everything is OK hang a .1uf at the output.
Just so that I am sure....do the square wave test 1 volt P to P, is this output of the generator or output of the amp? Power off, put a .1uf across the red and black speaker binding posts. Power up and check for ringing on the scope. He never says what volume or more precisely voltage to take the square wave to. Do I assume its to just before clipping or is it just a reference voltage you use for the test, say 12v or is it the 1v he speaks of at the beginning.
I had the same doubts when I was about to do these tests on my AU-D907. I even did these tests at too high power. But please do not repeat what I did because it may damage the amplifier. What I learned is that one must set the signal generator to output a square waveform with a small amplitude such that when you feed this signal to the input of the power amplifier you get about 1 Volt amplitude at the speaker terminals. Also the unit must be powered at full mains, and not via a dim bulb tester.