> Put analyser across the secondaries with tracking generator across the > input.
> I didn't expect what I am seeing so am I just measuring these wrongly > and they should look like that or is something really out ? > > Thanks > > Duncan > -- > Duncan Clark > Hi Duncan, To measure the filters with 50ohm tracking generator and 50ohm spectrum analyzer you need to put the spectrum analyzer across the entire secondary. The filters are designed to do an impedance transformation using 1/2 of the secondary. You should be getting responses similiar to what I have measured at: Files > KF4BQ > SR LiteXTAL BPF.pdf 73, Mike Collins KF4BQ
