In acest capitol vom descrie construcţia practică a unui număr restrîns de aparate de măsură specifice domeniului audio.
Intrucît amatorul nu are în mod normal posibilitatea să-şi procure astfel de aparate gata fabricate şi — chiar dacă are — preţul lor este de cele mai multe ori peste posibilităţile sale financiare, considerăm că realizarea prin mijloace proprii a unor astfel de aparate este pe deplin justificată.
In cele ce urmează, se vor da indicaţii concrete pentru construcţia unor utilaje electronice simple, al căror reglaj — la nivelul necesităţilor unui ama-tor — poate fi efectuat cu uşurinţă.
Sa începem deci cu construcţia unui ohmetru cu scara liniara.
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