The diagram of Fig. 100 reveals the entire circuit of a set with three stages of radio-amplification and none of audio. faculty textual content, schoolbook, textual content edition, textbook, textual content - a book organized for use in educational institutions or colleges; "his economics textbook is in its tenth version"; https://global-miracles.net/Portuguese_AM/publications_port/UCEM/um-curso-em-milagres.pdf