This vintage 1965 B&K Precision 666 tube tester is a must-have for any collector or enthusiast of vintage electronics. Made in the USA, this solid-state tester is perfect for measuring and inspecting tubes for quality and performance. The Dynascan Dyna Jet ะฒะฐะฝะตvskiัะบ tool is an excellent addition to any toolbox for vintage electronics. This tester is perfect for measuring and inspecting tubes for quality and performance. The brand B&K Precision is known for its high-quality products, and this model 666 is no exception.