collusions

Sure. When I started using ECl, it was emphasised to me that ECL will work perfectly provided you design all the itnerconnections as transmission lines and terminate them properly. Some otheter logic familes will work -- most of the time -- if you use any old bit of wire. So they're easier to design with, but the glitches from reflecitons on interconencting wires, etc an bite you. As for termination, for small designs, you cna use a pair of reissotr,s one to ground, the other to the -5.2V rail. I think you want -2V at the tap, with the appropriate impedance. Or a simple resistor of the right value to a -2V supply -- that's what the -2V rail in some old computers was mostly for. The latter has a lower power consumption on large designs. I made my own twisted pair wire-wrap wire. 2 spools of wire on a rod in the bench vis, the ends of the wirs in the chuck of a hand drill. Then walk aross the lab/workshop and get turning ;-). A bout 3 twists per inch gives a 100 Ohm pair IIRC. -tony