K2 Construction Notes: Toroids

 

How many toroids are there in the K2? Jeff Grudin, AC6KW, took this picture showing each K2 toroid in detail. Believe it or not, Jeff says he wound and tinned all of these in just 90 minutes!

As you can see, most of the K2's toroids are quite simple to wind. Just over half are used in the low pass filters and typically only have around 10 turns.