[time-nuts] Looking for ECL divide by 3 with symmetry

[ed breya]

I found I have some 10135 dual JK FFs on hand, so will try a version 
based on JK, that needs no extra gates, with a 10116 triple line 
receiver for I/O. If it turns out that symmetry is needed, I'll add a 
10131 D FF, and the 10116 already provides both clock edges. Either way, 
it should be reasonable in simplicity and power.

Ed