Wind your own coils12T will give you a coil of 0.6uH - 1.7uHand 0.5uH core removed Frequency : 25MHz ~ 100MHz use from HF to VHF, ideal for RF work etc2 Pack Coil Former with Ferrite Adjustment Core Inductor Wire WoundSKU: B401-R4016£1.99PriceFree ShippingOut of Stock