[AMPS] 4cx300's on 6 query

[Bob Duckworth]

Rich-

The specs say approx 30pf input

rough figuring.....
2 tubes 60pf
misc wire and socket TT about 100pf
Xc@50Mc about 30k ohms.

The specs also say the tube wants about 2.5W
drive. 2 x tube about 5W. 

If I have 10W and I want 60V and half the power
is going into my tubes and half into my resistor it looks
like a 1:6 turns ratio and an 1800ohm resistor will get me
the right swing from my 10W and look  like 50ohm to the
exciter.

So, why do I need tuned input?

Or am I way out in left field.?

-bob


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