div class=trans-pagebutton class=gotoPage data-page=1Page 1button div class=trans-imageimg data-url=documentvintagetek-pi-p7-and-pi-1-phosphors-were-al-so-available-in-the-t321-the-stand-htmlpage=1 data-page=1 class=trans-thumb lazyload alt=Page 1: vintageTEK · PI P7 and PI 1 phosphors were al- so available in the T321 The stand- ard phosphor was changed to P31 in 1962 for higher brightness The T321 became a T 3210 in loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader036fdocumentsinreader036viewer2022090609605f4646c4fc6b6bd5074e5ahtml5thumbnails1jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=2Page 2button div class=trans-imageimg data-url=documentvintagetek-pi-p7-and-pi-1-phosphors-were-al-so-available-in-the-t321-the-stand-htmlpage=2 data-page=2 class=trans-thumb lazyload alt=Page 2: vintageTEK · PI P7 and PI 1 phosphors were al- so available in the T321 The stand- ard phosphor was changed to P31 in 1962 for higher brightness The T321 became a T 3210 in loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII= data-src=https:reader036fdocumentsinreader036viewer2022090609605f4646c4fc6b6bd5074e5ahtml5thumbnails2jpg width=140 height=200 divdivdiv class=trans-pagebutton class=gotoPage data-page=3Page 3button div class=trans-imageimg data-url=documentvintagetek-pi-p7-and-pi-1-phosphors-were-al-so-available-in-the-t321-the-stand-htmlpage=3 data-page=3 class=trans-thumb lazyload alt=Page 3: vintageTEK · PI P7 and PI 1 phosphors were al- so available in the T321 The stand- ard phosphor was changed to P31 in 1962 for higher brightness The T321 became a T 3210 in loading=lazy src=data:imagegifbase64iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mM8Uw8AAh0BTZud3BwAAAAASUVORK5CYII=...