Given that Machlett makes X-ray tubes, I'd guess that's what it is ... de w1rt/john On Feb 16, 2008 3:51 AM, kenw2dtc <kenw2dtc at comcast.net> wrote: > > http://w2dtc.com/w2dtc-mystery-tube-page.htm > > _______________________________________________ > Amps mailing list > Amps at contesting.com > http://lists.contesting.com/mailman/listinfo/amps >