11/23 clock issue

Wow. Never thought to try that. Then again, I don't look for +5V on your average 74xxx when I'm debugging, either! :-) I mean, it's a trace, the solder on the pin looks good, that's as far as I go, usually! And there's nothing shown as connected to that pin on the circuit diagram. So I looked, and... it's at ground (or floating). The only pin that has anything is 14, at +5V (expected). But I looked online for some datasheets for similar oscillators, and some of them say 'pin 1 - N/C'. Are yours tri-state? (That's the enable pin on the tri-state ones.) I suppose even if yours are tri-state, I can still use them; a quick ohmmeter check shows that pin 1 isn't connected to either power or ground, so I can probably tie it high (via a resistor, which in addition to being normal practise, will prevent a major disaster in case I'm confused - a state I'm often in :-). Noel