[Johnson] Ranger/Valiant Xtals

[Fabio Liberatori]

    Hello,
            I would like to use xtals for 14.286 MHz operation, now my 
doubt is : what is the right xtal frequency for Rangers and Valiants ?

A colleague told me the right one for the Ranger is 7143; and for the 
Valiant ??

    Thanks and 73,
    Fabio, I0LBE