https://www.febo.com/pipermail/time-nuts/2017-March/104374.html
I posted another HP cesium beam tube patent at http://gonascent.com/papers/hp/hp5061/US3387130.pdf . It covers the formation of the cesium beam and should be of interest. We now have over a month of operation on our first HP5061B at ion currents over 50 μA with no lock problems. The uon pump voltage is 2,338 V at that current. We are still working for lock on our second HP5061B. Both of the HV power supplies had to be repaired and other problems remain. Anyone having supposedly unusable beam tubes with high ion current should contact me at trojancowboy at gmail .com. πθ°μΩω±√·Γλ WB0KVV _______________________________________________ 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.