Tung-Sol.com:: FAQs What is a JAN tube?

FAQs

Question:
What is a JAN tube?
Answer:
The term JAN stands for JOINT ARMY-NAVY. These are tubes that have been manufactured to a military specification or have been specifically selected for a military application. Most of the current stocks of JAN tubes are NOS (New Old Stock) tubes that were manufactured in the 1970s and 1980s. These tubes were either ruggedized during manufacture or selected from a very tight specification for highest performance and reliability. Since these tubes are no longer in production, when the current supplies are sold there will be no more.