Two more information:
1. All tests were made with turns spread over the whole toroid. So inductivity is lower than with turns pushed together.
2. Ref. to manual page 40 L508 should get only 11 turns and not 13. Calculate with 13 turns L should be 270 nH like shown in table (286 nH). I measured 270 nH when made with only 11 turns! So this points also to a higher AL than from the data sheet.
73 Ludwig
