Need some help building a TL072 preamp circuit
I have used the TL072 op-amp a lot because it is a quiet amplifier, good enough for at least 16 bit audio. But it is designed for +/- 12 volt to +/- 15 volt power supplies. The trick is to insert a 10 K resistor from the output pin to Vcc.

This causes an offset current that stabilizes the op-amp. Replace your 1 Meg resistor with a 100 K resistor. Delete your 50 ohm resistor. Insert a 10 uF capacitor with the (+) pin connected to your IN- input. Do not use your IN+ input as this is not an instrument amplifier. Now you have a single ended input with a gain of 10, and a stable op-amp. 

Because your output has a voltage equal to 1/2 Vcc on it, I would insert a 47uF capacitor at the output with the (+) pin going to the op-amp output.

The pin your pointing at with a red arrow is the Vee or V- pin, which normally goes to a -12 volt to -15 volt rail. You can just ground it if you use the trick I mentioned in the first paragraph. Without that 10K pull-up resistor the op-amp may produce severe distortion. Adjust the 100K resistor if you need more gain. For stability and ripple filtering there should be a 47 uF capacitor from Vcc to the ground (Vee/V-) pin.