div class=ts-pagebuttonPage 1button div class=ts-image amp-img class=ts-thumb alt=Page 1: The Cool Sound of Tubes - IEEE Spectrum · · 2016-12-19known as receiving tubes but now called simply tubes but from Asia In Japan Taiwan and mainland China in industrial src=https:reader031vdocumentinreader031viewer20220225175b0a7df97f8b9a604c8c809ehtml5thumbnails1jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 2button div class=ts-image amp-img class=ts-thumb alt=Page 2: The Cool Sound of Tubes - IEEE Spectrum · · 2016-12-19known as receiving tubes but now called simply tubes but from Asia In Japan Taiwan and mainland China in industrial src=https:reader031vdocumentinreader031viewer20220225175b0a7df97f8b9a604c8c809ehtml5thumbnails2jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 3button div class=ts-image amp-img class=ts-thumb alt=Page 3: The Cool Sound of Tubes - IEEE Spectrum · · 2016-12-19known as receiving tubes but now called simply tubes but from Asia In Japan Taiwan and mainland China in industrial src=https:reader031vdocumentinreader031viewer20220225175b0a7df97f8b9a604c8c809ehtml5thumbnails3jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 4button div class=ts-image amp-img class=ts-thumb alt=Page 4: The Cool Sound of Tubes - IEEE Spectrum · · 2016-12-19known as receiving tubes but now called simply tubes but from Asia In Japan Taiwan and mainland China in industrial src=https:reader031vdocumentinreader031viewer20220225175b0a7df97f8b9a604c8c809ehtml5thumbnails4jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 5button div class=ts-image amp-img class=ts-thumb alt=Page 5: The Cool Sound of Tubes - IEEE Spectrum · · 2016-12-19known as receiving tubes but now called simply tubes but from Asia In Japan Taiwan and mainland China in industrial src=https:reader031vdocumentinreader031viewer20220225175b0a7df97f8b9a604c8c809ehtml5thumbnails5jpg width=142 height=106 layout=responsive amp-img divdivdiv class=ts-pagebuttonPage 6button div class=ts-image amp-img class=ts-thumb alt=Page 6: The Cool Sound of Tubes - IEEE Spectrum · · 2016-12-19known as receiving tubes but now called simply tubes but from Asia In Japan Taiwan and mainland China in industrial src=https:reader031vdocumentinreader031viewer20220225175b0a7df97f8b9a604c8c809ehtml5thumbnails6jpg width=142 height=106 layout=responsive amp-img divdiv