insulated diddle stick - I like the Aven ceramic tools - Digikey handles them (pn 243-1014-ND)
As far as mechanical adjustment resolution - most(all?) 10544, 10811 + clones have electrical adjust. If you want to set it dead on, get a multi-turn pot and a quiet / stable supply. Sensitivity should be around 10ppb/volt. Bob On Thu, Oct 29, 2009 at 11:41 PM, Mark Sims <[email protected]> wrote: > > From my experience with HP 5370 counters that have either the 10544 or 10811 > oscillators, the 10544's seem to have quite a bit LESS long term drift than > the 10811's. This is comparing units that have been stabilized for at least > a couple of months of continuous operation. > > One disadvantage of the 10544's is that you need an insulated diddle stick to > tweak them. > > A big disadvantage of both units is their mechanical adjustment is rather > crude. Tweaking them in to the last few counts is essentially a random > operation. You make the minimum tweak possible, check the results, repeat > until one just happens to be close enough. There is no way to intentionally > adjust them to the resolution that the instruments are capable of. > > Like many old pots/caps, the sweet spot of where you want the adjustment to > be, is often unobtainable because the device has been sitting on that place > for ages and has deformed that spot such that you can no longer adjust it to > that exact value. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
