Signal tracer/injector

[Yorkie]

Re: the box, do you use a router or a gentlemans back saw for the joints?

Andrew

I made a comb joint router jig from scrap as they're quite expensive to buy but not difficult to make. I've attached a few pics to give you an idea what it looks like and how it's used, which I hope may be of interest. The jig consists of two main parts - a table under which the router is fitted with the bit protruding through a hole in the centre of the table, and a 'sled' which slides forwards and back. The sled has a 1/4" peg at its base, and the workpiece is held vertically againt the sled up against the peg, then moved forwards for the router to cut the slot. As each cut is made, the notch in workpiece if placed over the peg and the sled moved forwards to make the next cut. In use, the hardest thing to remember is how to make the next piece mate up with the one that's just been cut, but after a few tries, you get the hang of that! (I used any old scraps of oak that I can find from old furniture, oak flooring offcuts etc, which I cut to size on my bandsaw, then plane them smooth by hand).

I hope the pics help to clarify how it works.