I've an assignment in which I'm required to build an AM mixer circuit. Luckily, a friend of mine, who built the same circuit, still has the schematic of the circuit which is built around a CA3080 transconductance op amp. As shown in the attached schematic, a carrier of 50KHz is supposed to be modulated by a 1 KHz information signal, both of which are sin waves taken from two different function generators. I built the circuit with the same layout of the attached breaboard image, connected everything and there was no output. I kept trying for hours with no positive results.
To explain the breadboard image. The black wire is the ground of the whole circuit, that is, the ground to which the ground of power supplies, functions generators, oscilloscope and circuit components are connected. The orange wire is where +6V is connected and the purple wire is where -6V is connected. The brown wire is where the 50KHz carrier is connected and the green wire is where the 1KHz information signal is connected. Finally, the blue wire is where the oscilloscope is connected.
Is there anything wrong with the wiring or layout? any tips on why it doesn't work at all?