Rectifier for B&K 350 CRT Tester?

[Chris K]

Originally Posted by N2IXK

Most common 7 pin rectifier tube I can think of would be a 6X4. How does the wiring compare with a 6X4 pinout?

Thanks so much for the information. I don't know how much this differs from the more common 400 but I work on a lot of 1948-1950 TVs and this seems like a neat novelty to have on the shelf at least for CRT quality determinations. Not sure I want to rejuvenate a 10BP4 with it!