Computer Science, Education, Technology

This is a genuinely Irreplaceable collection of Teaching Aids on the subject of Silicon chip development and includes examples of production development by British Telecoms System X while in development pre-1979. From the glass valve transistor to the metallic equivalent. To how presented on actual micro chip level. Includes 1 rare unused original box dual glass valve (early transistor array) and an early glass quartz crystal oscillator - Both unused, in original packaging.

A collection of exposed microchips to provide visual teaching aid of an IC layout. A number of differant IC Silicone wafers with end production chips before separation. The tins contain various transistor variants, with exposed workings - I have shown only a handful. A great set of elements, deal aid to the subject of Transistors theory and usage - Virtually impossible to replace or match. Weight of this collection requires more than one parcel.

With the valve and crystal as a separate package - Costs are covered in asking price.

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