B & K 747B Tube Tester

This is the pride and joy of my test equipment collection. While in high school ( long ago in 2002 ), I also attended a part time tech school, taking a class on what else, electricity. The instructor of my class had a Philco console radio ( 47-1227) that he was wanting to get fixed, and said he could pay me in some old electronics parts. Those parts ended up being close to a thousand NOS vacuum tubes, mostly types for radios, and this tube tester. As you can see in the photo's, this tester looks almost brand new. It has had a very easy past. Perhaps it was used in the school when tubes were still in use. The only thing I did to it was a calibration by the manual.

The 747B, is the same as the 747, but with the addition of a circuit breaker. This is a mutual conductance type tester, which is one of the better types. It can test just about everything other than CRT's and older, large pin type tubes, like 45's, 6U5's, ect. Even though this is probably the least used piece of test equipment I own, It's still cool to have around.

A manual, and tube chart are available for free download here, courtesy of BAMA.