I powered the modules and unable to set the bias voltage
Both boards are showing same behaviour, the DC offset on one board is 15mv and on the other board is 7mv
Tried to adjust the trimmer but there is no voltage displayed
Regards
Raj
View attachment 775986
review your modules signal ground must be connected to main ground.
I powered the modules and unable to set the bias voltage
Both boards are showing same behaviour, the DC offset on one board is 15mv and on the other board is 7mv
Tried to adjust the trimmer but there is no voltage displayed
Regards
Raj
View attachment 775986
Try to change 1k resistor with 1k5 at bias circuit.
I powered the modules and unable to set the bias voltage
Both boards are showing same behaviour, the DC offset on one board is 15mv and on the other board is 7mv
Tried to adjust the trimmer but there is no voltage displayed
Regards
Raj
View attachment 775986
i have about the same issue but at one board when var is turned it adjust to about 2.3 mv, further that it jumps to +100mv and output transistors start heating.
can you tell me what you have did. i have ax17 but unable to adjust bias no voltages are appeared on meter no matter how much and in which direction bias pot is turned.
hi sir
i was reading some previous posts about ax17. i faced about the same issue in adjusting the bias and dc offset. i will try the given instructions. my pcb is without dc servo, also there is another amp ax15. iam thinking to make it. there might be no issue in offset and bias adjustment with ax15. it it true?.
i was reading some previous posts about ax17. i faced about the same issue in adjusting the bias and dc offset. i will try the given instructions. my pcb is without dc servo, also there is another amp ax15. iam thinking to make it. there might be no issue in offset and bias adjustment with ax15. it it true?.
I followed the 11683 procedure, earlier i haven’t connected the signal ground to chassis ground.
After connecting it DC offset from 15mv on one channel is dropped to 5mv.
Sure prasi after connecting it to my main speakers will share my review, as i do t have speaker protection so did not want to take risk
Regards
Raj
After connecting it DC offset from 15mv on one channel is dropped to 5mv.
Sure prasi after connecting it to my main speakers will share my review, as i do t have speaker protection so did not want to take risk
Regards
Raj
Go for a different topology if you want something different, like apex studio reference or AKSA quasi-complementary mosfet amplifier or DIYA honeybadger.
I think you are right. After making and listening to a40 with p30 , ax 20, ax 17, and ax 14, i want to try something different. i should definitely go for different topology. i am also missing my headphones because headphone jack of my laptop is not working and i don't bother to fix it. i have decided to make a headphone amplifier.
Yesterday i have connected AX-14 with my main speakers and found like left channel is having more gain than the right channel
Any suggestions to solve the issue?
One more observation is when i switch on the amp with out connecting the signal input there is thumb and hiss sound - is it normal?
Regards
Raj
Any suggestions to solve the issue?
One more observation is when i switch on the amp with out connecting the signal input there is thumb and hiss sound - is it normal?
Regards
Raj
