Radio Low Pass Filters

I have found a really useful number of tables for making Low Pass Filters, mainly used for suppressing harmonics from the output of amateur radio transmitters. Here are the charts:



Basic filter configuration, input and output are 50R.



These are the values recommended for each band.



Here is the data for the most common toroid cores, from which you can decide the core to use and the inductance per 10 turns.

This is the formula to use to calculate the number of turns required.




And this is the smallest toroid to use for a given power capability.