Good morning, I just recently put together an amp with these amp boards without reading up one the issues they might have. One is oscillation and it was recommended to charge the 1K resistor to 910 ohm one. The AC ripple is near zero on both boards and the DC offset is 6 mv on one board and 10.5 mv on the other. I have not changed the resistir yet.
I have an Leader old analog scope that is 20Mhz with dual trace and a 1khz sine wave is not very steady with the peaks fluttering around and I cannot seem to drive a signal through the other channel.
First of all, I have not used a scope that much, I do, to check power output mostly on the projects I build so I can provide details to a potential buyer but I need some advice on checking for other issues. I always put in speaker protection and make sure there is a Zobel network and a Thiele networks as well to quell most issues. I do not want to have someones speakers burn out because of an amp issue. Is there a proper procedure to check for oscillation on a scope and what does it appear like on the screen. ?
Any advice would be helpful. I have hooked up my old test speakers and the sound is good, but the balance seems off a tiny bit, could be my preamp or my ears as well.!
Thanks Wayne
I have an Leader old analog scope that is 20Mhz with dual trace and a 1khz sine wave is not very steady with the peaks fluttering around and I cannot seem to drive a signal through the other channel.
First of all, I have not used a scope that much, I do, to check power output mostly on the projects I build so I can provide details to a potential buyer but I need some advice on checking for other issues. I always put in speaker protection and make sure there is a Zobel network and a Thiele networks as well to quell most issues. I do not want to have someones speakers burn out because of an amp issue. Is there a proper procedure to check for oscillation on a scope and what does it appear like on the screen. ?
Any advice would be helpful. I have hooked up my old test speakers and the sound is good, but the balance seems off a tiny bit, could be my preamp or my ears as well.!
Thanks Wayne