Arie,

Your intrinsic coil Q of 100 seems wimpy. You should be able to get at least
200. You messed up on calculating the anode load impedance - do you really
have a 5400 VDC supply? Or did you mean the peak - peak RF was 5400V? At any
rate,. you ignored the plate saturation voltage, which will be around
300 -400 V. For 2700 VDC supply, and 300Vsat, the anode load should be about
(2700 - 300)^2/(2 x 1400) = 2057 Ohms. You should be able to find tables for
Pi network values. The output capacitor will come out a lot bigger than the
plate capacitor.

Tam/WB2TT
"arie" wrote in message
om...
Reg, thanks for your fine program,

but.., I get strange values.

When considering the below input-values I get 'strange' results:

- Frequency = 1.8 Mhz
- RF power = 1400 W
- RF peak amplitude = 5400 Volts
- External load res = 50 ohms
- Phase shift = 90 degrees (to get a Q of around 12)
- intrinsic Coil Q = 100

I get:

C1 = 122.5 pF
L = 63.80
C2 = 122.6 pF

Is sounds very strange to me that both C1 and C2 have the same
value whereas the Load resistance at anode is around 10414 ohms
or at least much higher than 50 ohms and an external resistance
of 50 Ohms

What about the Load resistance at anode, I would think this
should be somewhere aound 2800 ohms, considering the Power
output and anode voltage swing.

Arie.