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* [http://w140.com/mmm/tek-1a1-early.pdf Tektronix 1A1 Manual (early) (PDF)] | * [http://w140.com/mmm/tek-1a1-early.pdf Tektronix 1A1 Manual (early) (PDF)] | ||
* [http://w140.com/mmm/tek-1a1-late.pdf Tektronix 1A1 Manual (late) (PDF)] | * [http://w140.com/mmm/tek-1a1-late.pdf Tektronix 1A1 Manual (late) (PDF)] | ||
* [http://w140.com/tek_fcp/tek_type_1a1_factory_cal_proc.pdf Tektronix 1A1 | * [http://w140.com/tek_fcp/tek_type_1a1_factory_cal_proc.pdf Tektronix 1A1 Field Recalibration Procedure (PDF)] | ||
<gallery> | <gallery> | ||
Image:1a1_frontend.png|Early 1A1 front end | Image:1a1_frontend.png|Early 1A1 front end | ||
</gallery> | </gallery> |