Hi Let it run for a month before you worry much about measuring what it is doing …. Some (but not all) of those old crystals took a while to settle in.
Bob > On Aug 17, 2016, at 4:25 PM, Ed Palmer <ed_pal...@sasktel.net> wrote: > > I picked up a Sulzer 2.5 (not 2.5A or 2.5B or 2.5C) oscillator and 5P power > supply. It's working, but the AlDev at low tau is poor. After a few days of > operation the AlDev @ 1sec. is only 1e-10. It's not the power supply. I'm > running under 'AC fail' conditions with a lab power supply standing in for > the batteries. This bypasses almost everything in the power supply. > Eventually, I plan to replace the batteries with lead-acid and replace the > circuit board with an improved circuit. > > So, I'll be opening up the oscillator to see what's what. My first 'usual > suspect' will be the Ta capacitors, but I'm wondering about all those carbon > composition resistors. Should I be looking at a wholesale replacement with > metal film? Maybe just in the oscillator and AVC areas? Are there any other > known trouble spots with these oscillators? > > I haven't been able to find any info on the 2.5. The manuals and schematics > for the 5A and the 2.5B/C are some help, but the 2.5 is very different from > the 2.5B/C. Any info would be greatly appreciated. > > Thanks, > > Ed > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
