Hi Rich, If I determine that the tube filament is indeed bad after testing it outside the amp, I'll be glad to send it to you. Clay > > Clay -- Please mail me the tube with the open filament. I will repair > it if possible, or, if not, autopsy it and post the picture of the guts > on my Web site. > > Richard L. Measures, AG6K, 805.386.3734. www.somis.org >