DIYbanter - View Single Post

wrote in
ups.com:

It will do this when it gets dirty. Clean it out real good and even
take off the cover and see if anything needs cleaning. In so far as
magnetrons wearing out I wouldn't know.

They ARE vacuum tubes just like any other,and do wear out.
The tube cathodes emit fewer electrons over time,as they age with usage.

--
Jim Yanik
jyanik
at
kua.net