> W2AGN wrote: > Excuse please. A 50L6 is a 6L6 with w 50 volt filament. Sorry, you are mistaken. A 50L6 is NOT equivalent to a 6L6, or to a 6V6. It is a beam power pentode, but there the similarity ends. A 50L6GT (25L6GT) is about a 200V 10W tube. An essentially similar tube is the 50C5, the miniature successor. Fred