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* [http://bama.edebris.com/download/tek/6r1a/tek%206r1a.v6.pdf Tektronix 6R1A Manual (PDF)] | * [http://bama.edebris.com/download/tek/6r1a/tek%206r1a.v6.pdf Tektronix 6R1A Manual (PDF)] | ||
* [http://w140.com/tek_6r1a_1968_catalog.pdf Tektronix 6R1A in 1968 Catalog (PDF)] | |||
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