I have a Danelectro Leader amp that was the first amp my Dad gave me as a boy. Trying to find and or calculate appropriate output transformer replacement. This amp seems to differ from the only schematic available online. Differences are no isolation or step up tranny on the 115v in. Just a 60 ohm ballast resistor. Power Filter caps were three Planet 80-150 vdc not the 100 uF and one 22uF on schematic. Power tube grid resistors are 390k not 39k as schematic and cathode resistor is 82 ohm not 56 ohm as schematic. Tried to calculate for OT but have less experience than most. 25L6GT has two columns in general characteristics. Is the first column foe single ended and second column for push-pull? Finding others saying B+ is 180v. And output 10 watts for these amps? Original OT has 285308 on frame. Think found the code is Rola 53 8th week? I will be adding the isolation transformer soon as I know which one is big enough. Heard people say N-51 and others say they used N68 and got little hot. One more question I have is can the ballast resistor on the wall voltage in 115v be increased to offset todays 120v into help keep plate and grid voltages as designed. Thanks in advance for any help. I would love to get this running again after making it safe. I know I will come up with many more questions that I haven't gotten to. Thanks again.