"Joel Kolstad" wrote in message
...
"john jardine" wrote in message
...
The way to go is firstly design a prototype low pass filter. Then
transform
it to its high pass equivalent. Then transform to the band stop design.

This (alone) doesn't work if you want a 2% bandwidth filter at 500MHz
built
using lumped L's and C's with finite Q's. Try it. :-)

---Joel


Most certainly not up at that frequency. Just too many parasitics. :-).
(Even 150MHz is pushing it).
regards
john