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19G/12 - Baby Computer

by John Turner, October, 2013.
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This STC 19G/12 (CV1111) was used in the EHT supply for the 'Baby' Computer at Manchester Museum of Science and Industry. Properly this was the Small-Scale Experimental Machine, known as SSEM.

This valve failed and when tapped sparks appeared around the filament.

The label from the end of the box clearly shows that the STC Type 19G/12 is identical to the CV1111.

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