6f6ddb31bf (15Aug12). Some of you maybe may update themselves by studying books. Transistor Models and the Feedback Amplifier. Security CheckPlease enter the text belowCan't read the text above?Try another text or an audio captchaText in the box:What's this?Security CheckThis is a standard security test that we use to prevent spammers from creating fake accounts and spamming users.Submit. (15Aug12). Communications For 3%ers and Survivalists by Sparks31 Written by the creator of the Signal Corps Blog at Provides an overview of communications monitoring techniques for gathering information in disaster and other scenarios. It is a good choice for yourself but the problems coming to you actually is you dont know which one you should start with.