Drawing Load Line for Parallel Output Tube

[blue andry]

Hi ,

can somebody advise me how to draw a load line for parallel output tube ?

any help or link to recommended reading will be appreciated ,

Thanks

 

[DF96]

Just like one output valve. Then double current/halve resistance.

 

[Yvesm]

Or "relabel" the current axis (vertical) doubling the printed values and do as usual 😉

Yves.

 

[blue andry]

drive stage for parallel output tube

Hi ,
thanks for all your guys help .

i assume we just have to multiply n output tube per current axis or
divide transformer impedance per n output tube , is is right ?

how do we recalculate our grid voltage swing on parallel load line to determine
our drive stage output voltage ?

is it we have to multiply n output tube per initial grid voltage swing ?

planning to build parallel single ended by the end of this year ...

regards

 

[torrence]

The control grid should draw almost no current, so there is essentially no difference in the input drive voltage needed. The output voltage swing is also the same, but you get twice the current through half the resistance.