These filters work fine -after modification!- and I like the SWR bridge at the output. But, for the three I got, the capacitors were mounted in the wrong place. There was 56 pF at the input and output, and between the coils 33pf was mounted. Obviously, that will course severe problems when using the filter like that... After switching the capacitors (where I came one 56pf short -which I added from my own stock- and ended up with one 33pf too much) the filter gives fairly good results. I would not trust this board with 1 kW though...! Despite this being marked on the PCB. I think an absolute maximum of about 300 watt is more realistic (and might even be on the high site already...).
HIZLI TESLİMAT TEŞEKKÜRLER.