50w opt / 100w pt ?

[Andy Le Blanc]

I'm looking a build idea for kt88

the tube sheets favor a 4.5 k opt and a conservative 175ma limit on cathode dissipation
the older sheet say 175ma, the newer sheets say 230ma...

I can get a comfortable 225ma idle current for 2 tubes out of a 450ma twin pt
and most 40-60w fender generics are 4.2k, in the ballpark...

the current limits of both the pt and tube are well respected
but will the opt hold up?

a 50w opt with 100w pt

[VacuumVoodoo]

Most important to know is diameters of OT winding wires.
Then calculate max current density not to exceed 2.5A/mm^2