The 3CX1200A7 in my amp just blew I believe. Plate voltage fine, no plate or grid current. With that thought in mind I have been searching the internet and believe the A7 is no longer produced? Does anyone know of a source? I may be able to talk the wife in to a tube but doubt I can talk her in to a $4k amp. 73, Tim Herrick, KQ8M kq8m at kq8m.com