Noob question on testing a 7199 tube

[Thomas Lund]

Hello all.

I have some Lafayette 7199 tubes I like to test, it's a triode/pentode tube, I tested the triode successfully, but I get funny readings on the pentode, I am totally new to tubes so my question is, how to hook it up correctly, 

Thanks in advance.

Thomas 

[theold...@gmail.com]

Hi Thomas,

 

Without seeing what you call “funny”, it is very possible your tube is oscillating during the test. It is very common, and discussed in the documentation. In most cases it is easy to fix; take a small toroid core, and wind the grid wire a couple (2 or 3 is usually enough) around it, and try again. Experiment.

 

Cheers, Bill v.

--
You received this message because you are subscribed to the Google Groups "uTracer" group.
To unsubscribe from this group and stop receiving emails from it, send an email to utracer+u...@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/utracer/a167424f-ea96-4aac-a80a-99aadbc524c4n%40googlegroups.com.