div class=trans-pagebuttonPage 1button div class=trans-image a href=https:reader039fdocumentsusreader039viewer20220220085ade6fe17f8b9ad66b8b80fahtml5page1jpg target=_blank amp-img class=trans-thumb alt=Page 1: GenRad General Radio 1986 Sound Level Calibrator · The cavity of the 1986 is designed to fit GenRad 1 -inch microphones the WE 640AA and Tokyo Riko MR 130 An adaptor is included src=https:reader039fdocumentsusreader039viewer20220220085ade6fe17f8b9ad66b8b80fahtml5thumbnails1jpg width=142 height=106 layout=responsive amp-imga divdivdiv class=trans-pagebuttonPage 2button div class=trans-image a href=https:reader039fdocumentsusreader039viewer20220220085ade6fe17f8b9ad66b8b80fahtml5page2jpg target=_blank amp-img class=trans-thumb alt=Page 2: GenRad General Radio 1986 Sound Level Calibrator · The cavity of the 1986 is designed to fit GenRad 1 -inch microphones the WE 640AA and Tokyo Riko MR 130 An adaptor is included src=https:reader039fdocumentsusreader039viewer20220220085ade6fe17f8b9ad66b8b80fahtml5thumbnails2jpg width=142 height=106 layout=responsive amp-imga divdiv