I am getting a Bell & Howell model 100-203-3 oscilloscope in about a week. Since this is a basic student model oscope I plan on making it into an oscilloscope clock. I will also add a switch so I can select between the clock circuit or the front panel inputs so I can still use it as a scope if needed. I have these two clock kits http://dutchtronix.com/ScopeClock.htm
(I have the older version) and this one http://www.franktechniek.nl/Kits/oscill ... eclock.htm
(need to replace the DAC as the horizontal output doesn't work). I will use the one that works best on that oscilloscope.
I also may try and see if it is possible to add an intensity modulation input to the scope so I can use it to display a video signal as well although I'm not sure if the horizontal sweep goes high enough. If not I can use an external signal provided the horizontal amp has the required bandwith. Also I may install two DPDT switches on the back of the scope that will allow me to reverse the deflection plates so I can invert a signal on the vertical and horizontal inputs. That way if I find the displayed clock is upside down or mirrored I can flip a switch and fix it. It will also invert the action of the position controls, but that will not be a problem.
Best I can remember this scope is only AC coupled which may be a slight problem since both scope clocks work best with DC coupling.