Hi Brian,
I repeated the tests but this time using resistive matching pads to provide 330 ohm impedance to both the input and output of the ceramic filter versus using my very broadband transformers that provided a lower impedance (approximately 280 ohms). I also repeated using 270 ohm series resistors for matching. Since we now are only looking at the upper part of the response curve the loss in measurement dynamic range using the two different resistor methods should not be a problem.
Much different looking response using the resistive matching versus the transformers.
I again tested with a 10 pf, 33 pf, and 68 pf cap output loads and my reference curve used no capacitor on the load side.
Just FYI,
Don
