Check the listing for details. Tektronix 5A48 Dual Trace Amplifier Instruction Manual 1978. Condition: Used, Made in United States. Listed at 29.99 USD. The Tektronix 5A48 Dual Trace Amplifier Instruction Manual from 1978 is a comprehensive guide for operating and maintaining the product. Produced by the reputable brand Tektronix in the United States, this manual provides detailed instructions and diagrams to ensure optimal performance of the dual trace amplifier. With a focus on quality and accuracy, this manual is a valuable resource for users looking to maximize the functionality of their test equipment.