Thanks for the replies...I will probably give it a go and see what
happens. I will order values of inductors and capacitors on both sides
of my calculated values and play with the circuit until (if) I can get
it to work OK. Maybe an appropriate helical filter might be the way to
go...

Scott
N0EDV

Scott wrote:
I want to build a low pass filter for 1296 and have scaled a design out
of the handbook. I would like to use chip inductors and chip capacitors
for the filter. I was looking at thin film chip inductors (Digi-Key)
and they list the self resonant frequency. For an inductor passing
1296, what should the minimum self resonant frequency be? Is 10 GHz
enough? The filter is a 5 element Chebyshev Low Pass Filter, inductive
input (3 coils in series with a cap at each inner junction to ground),
Fco=1290 MHz, F-20dB=2600 MHz. Any other component specs I need to be
aware of?

Scott
N0EDV