[Milsurplus] SRR-11/12/13 and subminis

[Peter Gottlieb]

Given the most modern manufacturing processes and materials, would it be 
possible to build tubes which had a longer lifetime than solid state devices?

40,000 hours is under 5 years of continuous service, nothing special by today's 
standards.


Kenneth G. Gordon wrote:
> 
> Yes, but they take one hell of a beating in that few minutes and have to 
> be 100% reliable doing it.
>