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* [http://w140.com/tek_type-o_1968_catalog.pdf Tektronix Type O in 1968 Catalog (PDF)] | * [http://w140.com/tek_type-o_1968_catalog.pdf Tektronix Type O in 1968 Catalog (PDF)] | ||
* [http://w140.com/013-067_Log_adapter.pdf Tektronix 013-067 Log Adapter Manual (PDF)] | * [http://w140.com/013-067_Log_adapter.pdf Tektronix 013-067 Log Adapter Manual (PDF)] | ||
* [http://w140.com/tek_opamps_and_applications.pdf Tektronix Opamps and Their Applications (PDF)] | |||
<gallery> | <gallery> | ||
Image:Type_o_front.jpg|Front view. | Image:Type_o_front.jpg|Front view. |