[time-nuts] ? phase comparison or other device

[Bill Janssen]

I thought that someone was designing a circuit that could be used to compare
two oscillators.

What happened to that project?  I now have a HP 5370A so I have 
something, but
I would like to make simultaneous measurements on three or four "precision"
clocks.I am not qualified to design a "state of the art" device, so I am 
looking for others
to do that.

Thanks
Bill K7NOM