> To further document SRL+XV8.3, Tony has allowed me to post a band-pass > filter simulation to the Files > Lite+Xtall v8.3 > BPF_Simulation folder.
Hi David, I put some BPF measurements in the files section under KF4BQ > SR LiteXTALL BPF.pdf They are some sweeps of the BPFs around the passbands. The -3dB points are shown and can be compared to your simulation data. The filters were built as specified by Tony's document. I have also captured the actual built L and C values for some future fiddling. You may want to edit the insertion loss in your pdf and sim. The -6db is just the 50 ohm source resistor and load resistor. If you put in jumper wires for the filter you will get -6dB with the sim. I would probably just make the sources 2V to make things track. I did some similar sims in another tool, Serenade. It takes care of the port impedances for S21 calculations. I think I played with K factor on the transformers a bit and something around .7 seemed to track for these powdered iron standard transformers. Using some broadband ferrite transmission line transformers I was using around .99 for the K factor. Thanks for the data and keep up the work!! 73, Mike Collins KF4BQ
