[time-nuts] hp 10544A and 10811A ovenized oscillators

> Hi > > A failed ( = cold) oven on either a normal OCXO should give you a "tens of ppm” sort of frequency error. At 10 MHz that would be over 100 Hz. Fractions of a ppm are less likely to be oven issues. > Bob Bob, You're completely right about the ballpark of a total failure.. Anyhow, I

Re: [time-nuts] hp 10544A and 10811A ovenized oscillators

Hi A failed ( = cold) oven on either a normal OCXO should give you a “tens of ppm” sort of frequency error. At 10 MHz that would be over 100 Hz. Fractions of a ppm are less likely to be oven issues. Bob > On Nov 5, 2018, at 1:01 PM, Dr. Frank wrote: > > Walter, > > did you check on both

[time-nuts] hp 10544A and 10811A ovenized oscillators

Walter, did you check on both failing oscillators, that the ovens work properly afterwards, or that the cases still get warm? I once had a failing 10811, where the NTC was defect, maybe also after a longer unused time. As the heater draw an excessive current on turning on, (about 500mA for

Re: [time-nuts] Need recommendation for GPS antenna for Oncore GPS module

About 18 months ago, David Zoldan (Launch3.net) had over 250 surplus Symmetricom / Microsemi 58532A GPS Antennas from the cellular/mobile industry. https://www.microsemi.com/document-portal/doc_view/133381-58532a-datasheet He offered these to time-nuts group for an attractive price ($25 at time,