I've had another shot at the simple end fed half wave tuner and it's even better than yesterday's effort. The 12 way switch selects the input tap on the toroid and the wiring is quite neat as the toroid sits right on the back of the switch.
Here's the very simple circuit.
There are three turns on the earth end of the toroid, then twelve turns with a tap going out to the switch on each turn. There are three more turns at the hot end of the toroid. In use I find that the single turn selection is a bit too fine but it does seem to tune quite widely on bands over 40m with just a short wire over the clothes line.
Again I've used a $1 box from Woolworths and I plan to use more of these boxes in the future.
Being my second attempt I positioned the terminals better so that they didn't hit the internal components or the lid clips. Here it is nicely nulling the SWR.