The crystals in fundamentally rarely exceed 20MHz. Those that are marked in higher frequencies are third or fifth harmonic over-tone and with that circuit that samples will be unable to oscillate in over-tone. Ex: a crystal marked at 26,965MHz (Channel 1 of BC) actually oscillates at approximately 9,321.6MHz in fundamental and will do so in the third overtone on the other frequency. I don't know why you want to see the oscillation if you want to measure it with the visual indication (led in your scheme that started the oscillator) and a frequency meter is enough. If you do not have a frequency meter and you are going to work with crystals, it would be good to think about building one or buying. Personally I have frequency meters built for more than 30 years (when the thing was not so easy to order and buy) and they work without problems every day. On the Web it is flooded with frequency meters to build based on microcontrollers and a few more elements. I doubt that with that scheme you can attack the digital input of a 7474 and make it divide stably. If you enter 3 the output of the first splitter [b] x2 [/b] it is 5 connected to 11 (input) and the splitter x4 comes out 9 or 8 Regards. Ric.