National Union Vacuum Tube, Type 30.

This is a UX type 30, 4 pin Triode.  All tubes have been tested on a TV7 D/U tube tester unless otherwise indicated. 

The test results are on the tube, and the relative (minimum) test value for that tube is also listed.

This Type 30 tube tested at 48 (minimum test value = 23). 

Unless a tube is listed as New Old Stock, it is assumed to be a used tube.  

Please note that all sales are final, NO Warranty,  NO Returns or Credits.  If you have any doubts or  questions we encourage you to contact us directly and we’ll be happy to answer any questions.