I am building an Affordable Solar Radio Telescope and for it I need an amplifier. I have built the circuit described in pg 8 of this link.
I have built the exact circuit but I am using a dual supply of 12 V (because I am using op amp IC 741 and read that it works on dual supply).
But the op amp is providing negligible gain, and even though my input is positive. And I am using non inverting mode my output is negative.
What to do?