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February 28th 07, 08:35 PM
posted to rec.radio.amateur.homebrew
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lownoise fm preamplifer design help reud.
I want to make one 2 stage low noise fm amplifier. 88~108Mhz. 75 ohm
input output impedance. I am newbie to this field but i am attracted to learn by bulding. I hv bought RF transistor & & hv it's .sp2 file. Also downloaded quicksmith chart, RFsim99 etc. Can u help me in designing? The s parameter of the input transistor is S parameter for 50 ohms ! f S11 S21 S12 S22 ! MHz MAG ANG MAG ANG MAG ANG MAG ANG 100 0.71 -49.5 18.61 139 0.023 65.8 0.834 -22 Nf 1.15 GO .18 ang : 126 Rn .15 |
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