Nothing special here, something I wanted to do for a long time.
When working (testing) with receivers there's no need to build an audio amplifier for each one (test), so why not make an universal one and putting all together in a nice little box...
I didn't draw one of my fantastic s schematics since you can build based on a better one, this one is easier to follow...
Mine doesn't have the capacitor between pin 8 and 1 (gain). The bypass is a 10uF capacitor and the 10 ohm is an 1 ohm resistor. Input dc blocking cap was added.
The final result:
On the right the input impedance tester and a 50 Ohm dummy load in a round tuna tin. on the left the frequency meter and the dip meter box.
And before being placed in the box: