I have the atatched ain clone amp am planning to use as tweeter amp. It has been built on pcb will attach the pcb layout soon. The amp is producing a low frequency noise but its not a hum. (like when you touch the input lead of an unterminated amp)
When the input is shorted to the ground the noise dissapears.
If i connect it to my active xover the noise is even stronger.
With only gnd connected but signal removed the noise is lower. As signal is connected noise appears( Could it be the opamps TL072 offset in my xover?)
The chip is getting hot(Could be the noise/oscillation)
If i substitue the gain clone with one of discrete amps with same psu and connected to same xover there is no noise/hum
Sorry i don't have any scope to measure the output voltage.
Can the atatched circuit be modified to remedy to the problem?
Thanks
P.S PSU is 4X4700uF Followed by one LM7815 and 1 LM7915 for Xover supply
When the input is shorted to the ground the noise dissapears.
If i connect it to my active xover the noise is even stronger.
With only gnd connected but signal removed the noise is lower. As signal is connected noise appears( Could it be the opamps TL072 offset in my xover?)
The chip is getting hot(Could be the noise/oscillation)
If i substitue the gain clone with one of discrete amps with same psu and connected to same xover there is no noise/hum
Sorry i don't have any scope to measure the output voltage.
Can the atatched circuit be modified to remedy to the problem?
Thanks
P.S PSU is 4X4700uF Followed by one LM7815 and 1 LM7915 for Xover supply