I am in the middle of resurrecting a HP105B, It is one of the later models with an 10811 in.
I have fixed the obvious issues like the electrolytics that were missing and other parts that had leads evaporated due to corrosion. The basics seem to work, A not bad looking sine wave etc. But the ADEV numbers are terrible. I am going back to make sure it's not a measurement setup issue. That is good. Just tested another OCXO and the test setup is good. Attached in a link to a .tim file https://www.dropbox.com/s/zebwiqy913v7k0k/HP105B%20test.tim?dl=0 I am hoping one of the more knowledgeable folks might suggest where to start looking. I have checked all the other electrolytics and the ESR and capacitance looks good. I think the power supply seemed clean. I have taken out the easy to get boards and cleaned card edges etc but this persists. The saw tooth on the original phase is yelling something at me but I don't have a clue. Thanks Dave -- 72 de Dave VE7HR _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
