I've just been given a fully functioning (I can turn it on) TCA1100. I used an 1100 some time ago but with a controller I'm sure. I remember somehow using an HP calculator as a controller but, phew, that was eons ago. All I want to know it how to use the jigger without a controller if possible. I'm retiring in a month or two and the instrument will make a handy addition to the tool shed for the odd chookhouse setout here or there if it is operational.