); SAEximRunCond expanded to false Errors-To: [EMAIL PROTECTED] RETRY Hi Rick:
If the aging drift is up in frequency then there might be an advantage in starting at the low end of the window. Any idea of how these age? Have Fun, Brooke Clarke http://www.PRC68.com http://www.precisionclock.com http://www.prc68.com/I/WebCam2.shtml 24/7 Sky-Weather-Astronomy Cam Richard (Rick) Karlquist wrote: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] RETRY > > The labels may or may not be significant. If the frequency > is indeed -2.94 Hz at 2.5V EFC, you could probably get it back > to 10 MHz by increasing the EFC voltage. You can also decrease > the bridge capacitor to bring the frequency up if necessary. > The factory was supposed to choose the capacitor to get 10 MHz > in the center of the EFC range. If this is not correct, the > oscillator is usually perfectly OK , and they just > goofed on the capacitor. The capacitor installation process > had a lot of problems. Should be safe to power it up and see > what the status is. > > Rick N6RK > > Jeroen Bastemeijer wrote: > >>); SAEximRunCond expanded to false >>Errors-To: [EMAIL PROTECTED] RETRY >> >>Dear All, >> >>After some shipping time, my E1938 arrived today! :-) :-) :-) >> >>Thank you Rick! >> >>First thing was examining the board, oscillator and the HP-test >>notes/labels. Most of the specs mentioned there are logical and numbers >>are very reasonable. ;-) However, one spec drew my attention: "Hz off >>freq. after warm up: -2,94". Does anyone know what it means? Is this the >>offset after warm-up without EFC applied? >> >>The unit hasn't been powered up. Whit the hardware at hand I first want >>to read some docs to be sure about what I'm doing. For comparison, what >>other numbers are around for the "Hz off freq. after warm up"-spec? >> >>Final result of the HP-test was: PASS. So, I assume this number is OK. >>What is your opinion? Looking forward to your reactions. >> >>73 Jeroen PE1RGE >> > > > _______________________________________________ > 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.
