Jim Miller schrieb: >> i have a problem with my HP10811 ocxo. I connected it properly to 24V, 12V >> and to my counter to measure its frequency. The measured frequency is 10.887 >> MHz, but it should be 10MHz (also noted on the 10811). A 5MHz tcxo is >> measured correctly, so i think the counter is okay. Can anyone help me ? > > There is a thermal fuse on the oven control board which sometimes > blows due to age, or it vibrates out, or otherwise fails. This causes > the oven to not operate and the unit is guaranteed to be off frequency > by a large amount. > > Take the bottom off the unit and you'll see the board and the fuse. > It looks like a large axial capacitor. > > A little searching on the Internet should find you the schematics and > manuals and descriptions of the identical problem that others have > had.
Hello Jim, thanks for your remarks, but i dont think that the oven fails. The power consumtion is about 3W and the unit is gettuing warm on the outside. I guess this is okay ? [EMAIL PROTECTED] _______________________________________________ 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.