Today I spent an hour building the filter for 20m which I also as the previous filter found in Elsie. This time since the inductances were supposed to be 500nH and 340nH I decided to use air wound inductors. Probably gives a higher Q since the insertion loss got so low. I have however not measured the Q of these ones as I did with the ones wound on T130 cores.
I got very happy about the performance, so it will be very interesting to test them.
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