Soemtron ETR220 Calculator Gallery

All unmarked images ©2007– www.soemtron.org

Many thousands of Soemtron ETR220's were made during their production run and by modern standards they are very large and cumbersome, but very typical of their age - the 1960s.  This section shows a few views of a typical Soemtron ETR220 in good condition owned by calculator collector Serge Devidts.

Soemtron ETR220
Good condition ETR220		 Inside view of a Soemtron ETR220
Inside view		 Decimal point selection
Decimal point selection		 Nixie tube display closeup
Nixie tube display close up
Four photos above ©2007 Serge Devidts, for more see his website.
Click an image for a larger version

Photos here show a glimpse of the reversed order build of the early Soemtron ETR220's along with the differing power supply configuration.

Reversed board order
Reversed board order
 		 Regulator heat sink
Regulator heat sink
 		 S#27027
S#27027
 		 Soemtron ETR220 LEFT build and RIGHT build units together
LEFT/RIGHT build units
Three photos above ©2009 Philipp MaierPicture ©2012 Rüdiger Kurth
Click an image for a larger version

Site design ©2007– soemtron.org - privacy -