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RE: 300B IT 1:1 845, A2 possible?




Hi Sideliner,

I assume 360V p-p (180V peak) swing should bring me to expected output power. I use 10K output tranny

180V x 4.77 (845 mu x 90%) / 36 (10K:8) x0.707=16.9V rms

16.9V square / 8 ohm = 35 watt

But my 845 plate volt is only 910V, meaning my A1 is only up to 125V peak at grid, meaning 18watt A1, to reach total 35 watt the grid need positive voltage of (180-125=55V)

However, the deeper in A2 the more substantial decrease of grid impedance

Yes, the standing current need increment. I simulate the load line with 50mA and ASSUME tge grid drop to 5K ohm in the attached diagram


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