>has someone got the basic data and socket pinout for PL504 ? I know the >heater characteristics and have deduced the pinout by looking through the >glass but I'd like to be sure. I mostly need Pdmax Ia@Ua Uamax and Vg0, >Ug4 and S or mu ;-). I think Vg0 is something like -65V no ? What is this? A TUBE??? :oD Are you looking to make a solid-state module= with pic to replace it? :oD -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.