Coax Filters - 23cm etc.

Simon G8DMN

Thanks to Neil G4DBN for his talk on machining, oh for a workshop like that! The filter design spreadsheet from F1FRV doesn't seem to be available, the links are not working at the moment. Anyone have a copy? 
I built a filter using dimensions from, but these don't appear to allow for the extra capacitance from the sides of the larger discs. I had to machine a bit off each disc - tricky when it's all soldered together.

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