general power tube output impedance chart?

[speakerfritz]

ran across this while doing some googling. anyone know of any others. straight forward charts would be better than math formulas.

 

[TonyTecson]

i think that those impedances should have B+ voltages associated with them, otherwise they don't tell a whole lot imho....

 

[speakerfritz]

i think that those impedances should have B+ voltages associated with them, otherwise they don't tell a whole lot imho....

sounds like a good idea...so does such a chart exist? I posted a Groove tube chart with different bias voltages for different type tubes in another thread. So sure, a plate voltage chart should be floating around somewhere.

 

[SY]

Those aren't tube output impedances, they're the plate-to-plate impedances of the output transformer for some specific amps.

 

[TonyTecson]

it says on the charts, primary impedances, so i assume they are plate to plate impedances, what caught my eye, 2 x kt66 8000 ohms, must be either lower powered or high B+....

 

[Globulator]

it says on the charts, primary impedances, so i assume they are plate to plate impedances, what caught my eye, 2 x kt66 8000 ohms, must be either lower powered or high B+....

Is that across the whole PP primary though, or from each leg to the centre tap?

 

[SY]

It's plate-to-plate for the push-pull amps.