At the risk of straying off topic, any of the radio amateurs on the list (or anyone that's interested in valves) might like to follow this link. http://dailymotion.alice.it/video/x3wrzo_fabrication-dune-lampe-triode_tech It's better than anything on the TV! JohnP MODEL ENGINEERING DISCUSSION LIST. To UNSUBSCRIBE from this list, send a blank email to, modeleng-request@xxxxxxxxxxxxx with the word "unsubscribe" in the subject line.