02-08-2010, 05:15 PM
Not sure, you'd have to check the schematic, but I think the original power rectifier should be a 5Y3. The Rectifier tube in the picture looks like a 5U4GB, and the adapter looks good from here. I've done the same subbing a 5Y4 for the 5Y3. It should be OK, but the 5U4 generates a lot more heat.
Joe
Matthew 16:26 "For what does it profit a man if he gain the whole world, yet lose his own soul?"