HI EME gang Have got some pro and contras abt the burning in an unused tube : Read this vy informative and gd knowledge abt. the subject. And thanks ALL for the mails. BI look : http://f1frv.free.fr/main5a_Tetrode_Preparation.html Agn a splended example on the knwledge of the mmon - net. VY 73 de OZ5IQ, Kim