måndag 14 december 2015


Low pass filter for Minima


I need a Lp filter to put after the PA-2008. I made a copy of the original design and add 2 pcs. off 5v regulator. My relay is 5V. I made simulation of the filter in ELSIE program. The result from Elsie is to optimistically. Perhaps I should have use heavier wire in the inductor. If more stop attenuation is wonted, I think better layout and more shielding is needed.


Here is the ELSIE simulation.




Her is the real result only filter on PCB.





Here is the measurment, in - out of the PCB.






I hope it has been better but here is the result.


I have run a first QSO, but Murphy is with me, i will come bake, stay tuned.