Tuhia he tomokanga mo tenei pene - I te tau 1951 i hangaia ai te kaikorero nekeneke-a-rangi 25-watt, mo te Whakaaturanga Ahuwhenua o taua tau i Moscow. Mai i te 1954, ka timata te tipu ki te whakahou me te arotahi ki te waea me te microphone production. I te tau 1957, i whakaatuhia nga waea iti a Oktava me nga kaikorero hurihuri hurihuri i te waahanga Ruhia i te whakaaturanga 1958 i Brussels
He aha? I te tau 1961 i whakauruhia e Oktava te waea iti-iti D2 ka tiimata te tuku hopuoro hihiri ki te Kremlin. I tīmata hoki te wheketere i tētahi huringa tuarua o te whakahoutanga me te tīmata ki te whakaputa i ngā taputapu ine hiko-acoustic hei whakamātau i ngā hopuoro me ngā waea.