Hello,
I have this FM radio kit (attachment) build on a TDA7010T and an LM386, but would like to use another amp instead of the LM386.
I was hoping to take the TDA7010T source directly to the other amp input but, soon realised that its Vout was only 75mV, the other amp Vin is 800mV.
Is there an easy way of bringing that 75 to 800?
Or should I use the speaker output conversion to achieve a line level of 800mV?
If I use the speaker output, would it make any sense to drop the gain of the LM386 to x20, so its output would be 75mV x 20 = 1.5V so I would only need a 2:1 voltage drop.
The other amp has an input impedance of 22k.
What would be a good choice of resistors?
Can the volume pot stay where it is or should it come after the LM386 ?
Thank you
I have this FM radio kit (attachment) build on a TDA7010T and an LM386, but would like to use another amp instead of the LM386.
I was hoping to take the TDA7010T source directly to the other amp input but, soon realised that its Vout was only 75mV, the other amp Vin is 800mV.
Is there an easy way of bringing that 75 to 800?
Or should I use the speaker output conversion to achieve a line level of 800mV?
If I use the speaker output, would it make any sense to drop the gain of the LM386 to x20, so its output would be 75mV x 20 = 1.5V so I would only need a 2:1 voltage drop.
The other amp has an input impedance of 22k.
What would be a good choice of resistors?
Can the volume pot stay where it is or should it come after the LM386 ?
Thank you