John, If the one that failed is now dead, they are not all that hard to open up. Component failure analysis once was a job for me. I've not looked at my two closely and they are not in front of me, but I use to grind off the seam two ways, have a can opener, they actually make them for this purpose. If not and you have a model shop start by using a belt sander to 'grind' down the lip, then I'd take over with a die grinder and a set of very fine files.
If you really want to gamble, and have a cheap pair of cutters you dont mind abusing, and if the can is not steel you can cut the lip off. Either way, the edges will be VERY sharp, ... -pete On Fri, Dec 23, 2011 at 1:49 PM, jmfranke <[email protected]> wrote: > I tested a couple of the oscillators. The Reference Output Voltage does not > plateau as the input voltage is increased. It does hit 3.00V for an input of > 3.3V. It is at 4.5V when the input is 5v and keeps climbing well past 5V as > the input voltage is raised. So, it appears to be a simple 0.9 times the > input voltage. One unit failed at 12V. At 3.3V, the initial current drain is > 0.45A for a net power of 1.48W and after a short time the current drops to > 0.16A for a net power of 0.53W. Both numbers are well below the maximum > ratings, but typical ratings are not given and the rapid drop between the > two plateaus indicates the oven controller is working fine. > > So, my bet is placed on the devices being 3.3V. > > John WA4WDL > -------------------------------------------------- > From: "Peter Gottlieb" <[email protected]> > Sent: Friday, December 23, 2011 2:57 PM > To: <[email protected]> > > Subject: Re: [time-nuts] eBay Giveaway Vectron OCXOs > >> A search of the Vectron site for OCO500 (which is on my unit) brings up a >> datasheet which references that as a "replaced" unit. >> >> http://www.vectron.com/products/ocxo/c4550.pdf >> >> Shows there are 5, 12 and 3.3 volt options. I don't see where 4.8 volts >> is a reference output voltage, the closest is 5 volts with the 12 volt unit. >> I would put the unit on a variable bench supply and slowly raise the input >> voltage to see where the reference stops increasing but I would hazard a >> guess that it is a 12 volt unit. If you increase the supply to 5.5 etc then >> in that case you would see the reference stop increasing at 5.0. >> >> Peter >> >> >> >> On 12/23/2011 2:42 PM, Magnus Danielson wrote: >>> >>> On 12/23/2011 08:26 PM, [email protected] wrote: >>>> >>>> Running it at 5V with a Ref out at 4.8V would seem too close. Maybe it's >>>> a >>>> 12V part? >>>> >>>> If nothing else this could be a very stable, ovenized 4.8V lab reference >>>> source.. >>>> >>>> Is anyone planning to monitor the aging/stability/noise of this >>>> reference? >>> >>> >>> My guess would be for 12 V, but 5V would be one to try. >>> >>> Measuring the frequency stability on 5V would be one thing to try. >>> >>> Cheers, >>> Magnus >>> >>>> bye, >>>> Said >>>> >>>> >>>> In a message dated 12/23/2011 07:28:34 Pacific Standard Time, >>>> [email protected] writes: >>>> >>>> Thanks for all the responses. A quick check before breakfast shows >>>> that >>>> mine would seem to be for 5 Volts since the power consumption at that >>>> input agrees with the data sheet referenced; the current peaks at 0.95 A >>>> warming up and 0.13 A warm. Reference V out is 4.8 V. >>>> >>>> Dan >>>> >>>> >>>> _______________________________________________ >>>> 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. >>> >>> >>> >>> _______________________________________________ >>> 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. >>> >> >> _______________________________________________ >> 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. >> > > > _______________________________________________ > 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. _______________________________________________ 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.
