[AMPS] LP Filter Performance

[Peter Chadwick]

Carl says:

>I'll bring in a ICE filter to work and play on the network analyzer with
>various resistive loads.

You need to do it with reactive loads as well, Carl. Incidentally, an
elliptic function filter will tend to have minimal degradation at its poles
as VSWR goes up, but I haven't seen a ham LPF of anything other than the
straight Butterworth or Tchebycheff form.

Most of the time, there's very little difference, but there are pathological
cases which can screw up the attenuation, as I said before.

73

Peter G3RZP


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