After many yeaqrs admiring form afar, I've acquired my first piece of timenuttery, an Efratom PC-10 portable rubidium clock, S/N 101 (possibly the first production unit?). It has the usual decade sine and ttl outputs plus a front panel intervalometer or clock, or at least that's as much as I've figured out since it came with no documentation whatsoever
It warms up, the unlock light and crsytal adjust lights go out, and it seems to keep time as accurately as anything I can measure it against (no surprise). The 10MHz output beats dead on to my recently retuned HF rig. It's a great little unit but I could use some more information on e.g. the phase shift adjustment which seems to allow you to discipline it with a front panel 1PPS input but isn't super obvious, as well as maintenance, calibraiton, and test. As far as I can tell Microsemi, who bought Microchip, who bought Symmetricom, who bought Datum, who bought Efratom, have never heard of this adorable little beast, nor has the internet. Google image search mostly returns pictures of my unit (I know there's at least one other one out there as it has a different front panel switch). It's based on an Efratom FRK-H oscillator, but does anyone know anything at all about the PC-10 specifically? I'd love any docs you have. Some quick and dirty photos at https://www.flickr.com/photos/9100973@N06/albums/72157711587895206 --more to come. thanks, david n8qg _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
