Buy one here:
CARE: Watch out the capacitor mounting screws CAN be too long, do not put them in too far (use washers or a spacer (piece of plastic off cut from an old credit card works well)) or else it will be terminal for the capacitor.
CARE: I had someone ask me
"I am almost finished with it but cannot find anywhere where to solder the end of the enameled wire that makes the inductor. Your instructions say the end nearest the ten windings attaches to the wire between the capacitors I believe. But where does the other end attach to? To ground?
I can't believe it remains unattached."
so for the benefit of all...
Look at the circuit diagram and then re-read the whole of the steps to winding the toroid .... and then think about it. Position 1 should be the 10T tap, position 12 on the switch should be ALL the windings, so the end of the wire. You spread the winding over the torroid and have the switch select different L values. If you have filled all the switch positions and have wire left you have added 1 too many tap points. Either reorganise them or use the tuner without the extra L 1 turn or whatever will give you and cut the bit of wire off at the 12t switch position (you really should reorganise, don't rewind the whole thing just desolder one of the taps move it away from the switch (use a bit of tape so it doesn't short circuit or anything and move the others along one position (near the 12th position end) then solder the wire end to the 12th position. I would make sure you have ALL the windings sorted before soldering to the switch.