Hello to the group. Was time for the quarterly Cesium and RB checks in an effort to support our local power company. I discovered that there is an issue with the HP5065a Rubidium reference.
The frequency has slowed and the cfield pot can not make up for the jump. Normally a few small tick marks are ever needed. I used 3 large marks and ran out of pot. Its at 9.9. Was at 6.14. The frequency does increate with the cfield adjustment. I am assuming perhaps something has happened in the cfield regulator. At least the front panel meter is indicating the +20V supply is normal. But my question is this. The schematic indicate very little current travels through the cfield coil. Guessing far less than 3 ma. by adding up resistors. What I do not know yet is what is the resistance of the cfield coil? I may find that I simply have dirty contacts on the A15 regulator card. Its possible there are other things wrong but all front panel meter readings look the same as they have been for years. Thoughts? Thank you in advance. Paul WB8TSL _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
