eBay Featured Item:

Vintage Tektronix 321A Battery Operated Oscilloscope!  (SOLD)

This oscilloscope was an early battery operated scope (the first was the Model 321). It could operate on either a 115V AC source, and external 11.5-35V DC source, or a "battery pack" of ten size "D" flashlight cells. It was first manufactured in 1964. Unfortunately, I don't have a power cord to go with it. But even if you never power it up, it would be a great find for the avid collector. It is currently available on the PDXBuys eBay page for only $49.99 (BIN price)!  The Model 321A User Manual can be found at:

http://pcbunn.cithep.caltech.edu/jjb/tektronix/321A/321a_scope.pdf

A Brief Tektronix History:

Tektronix, Inc. is a North American company best known for its test and measurement equipment such as oscilloscopes, logic analyzers, and video and mobile test equipment. The company traces its roots back to the electronics revolution that immediately followed World War II. The company’s founders C. Howard Vollum and Melvin J. "Jack" Murdock invented the world’s first triggered oscilloscope in 1946, a significant technological breakthrough. Tektronix was incorporated in 1946. Today, Tektronix is a subsidiary of Danaher Corp. Tektronix headquarters are in Beaverton, OR. (Source: Wikipedia)