I read the "HP-45 Crystal Modification" page with great interest. Then spent many hrs on the web trying to find a 784 kHz crystal, or resonator... of any "cut" or "mode" but it is such a weird frequency (rather low and also unusual). Does anyone know where I can get two (or even one)? I cannot find a crystal manufacturer with stock or willing to make only a few of this unusual frequency. Also, Does the "enter key modification" change the normal functionality of the calculator (I'd like to keep using it as a calc as well as a cool stopwatch!). Thanks for any help!
hp-45 crystal 784kHz
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