My doubt is because the same pass filter of BITX40 should not have 6uH because the scheme says 40 turns on toroid T30-6. Apparently this does not affect you. On the other hand I thought it was a filter with a series tuned circuit but if you put 6uH in series with 100pF you get 6.497Mhz ...
Additionally Allison, this filter does not have variable capacitance.
