Soemtron 220 Calculator Gallery

All unmarked images ©2007- www.soemtron.org

Many thousands of Soemtron ETR 220's were made during their production run and by modern standards they are large and cumbersome, but very typical of their age - the 1960's.  This section shows a few views of a typical Soemtron ETR 220 in good condition owned by calculator collector Serge Devidts.

Soemtron ETR 220
Good condition ETR 220
Inside view of a Soemtron ETR 220
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 220'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 220 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)

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