div class=trans-pagebuttonPage 1button div class=trans-image amp-img class=trans-thumb alt=Page 1: RCA 2F21 monoscope tube data sheet · 2013 9 28 · vol ts vol ts vol ts meg vamp DATA Grid—No4 Current see next page JUNE 20 1946 JUNE 20 sacs-sees TENTATIVE DATA src=https:reader031fdocumentsusreader031viewer20220119155fca1bdee6167f3577340ca7html5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 2button div class=trans-image amp-img class=trans-thumb alt=Page 2: RCA 2F21 monoscope tube data sheet · 2013 9 28 · vol ts vol ts vol ts meg vamp DATA Grid—No4 Current see next page JUNE 20 1946 JUNE 20 sacs-sees TENTATIVE DATA src=https:reader031fdocumentsusreader031viewer20220119155fca1bdee6167f3577340ca7html5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=trans-pagebuttonPage 3button div class=trans-image amp-img class=trans-thumb alt=Page 3: RCA 2F21 monoscope tube data sheet · 2013 9 28 · vol ts vol ts vol ts meg vamp DATA Grid—No4 Current see next page JUNE 20 1946 JUNE 20 sacs-sees TENTATIVE DATA src=https:reader031fdocumentsusreader031viewer20220119155fca1bdee6167f3577340ca7html5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdiv