suitable mic preamplifier for 0.7 Vpp scrambler circuit

[asrarbaig]

Hi everyone, well i m new to this forum an i need your help. i m building a voice scrambler but i am stuck in between. i would like to know which mic-preamplifier circuit is the best for producing an ouptut voltage of 0.7 Vpp or less than that so that i can give it to my scrambling circuit. thanking you all,

bye.

regards,

Mughal. :)