[Amps] L networks in Amplifiers
Thu, 16 Jan 2003 10:41:26 -0800
> It seems to me that if you have a band switched low pass filter
>following your impedance matching network the
>Q of the network is not so important. In fact a Q of 2 or 3 would be just
Less Q means less Z transformation ratio. A Q of 2.5 might be ok for a
tube with a RL of 300-ohms and a 50-ohm antenna. Eimac recommends
aminimum Q of 10.
> It performs the matching requirement and the
>switched filter eliminates the harmonics.
Compared to a Pi, harmonic reduction is typically 15db better for the
>Is there anything I am missing
> Also, I have noticed that a few people don't realize that the capacitor to
>ground goes on the Hi-z end of the
>network, the plate.
>Amps mailing list
- R. L. Measures, a.k.a. Rich..., 805.386.3734,AG6K,