[time-nuts] how long dues this rubidium standard last for

2018-05-10 Thread cdelect
Paul, I agree with Bob, the small telecom ones to include the Efratom ones have a lifetime that is just a guess at this point. A brand new PRS10 with a warranty and the original owner repair discount would be a good bet, they do however have lamp assy problems unless that has been redesigned.

Re: [time-nuts] how long dues this rubidium standard last for

2018-05-09 Thread Bob kb8tq
Hi Rubidium standards are a “who knows” sort of thing in terms of life. Best guess for the telecom Rb’s is 10 to 20 years. For a normal Cs standard with a high performance tube, the life may be in the 6 or 7 year range ( I have replaced a couple of those). The HP 5065 is a rare beast. One sold

[time-nuts] how long dues this rubidium standard last for

2018-05-09 Thread Paul Bicknell
Hi all as I am new to time nuts could someone please help with e following questions I have a Racal 9475 and a comment was it is a good entry level rubidium That is not working yet how long dues the rubidium standard last for and how much to replace? I assume rubidium & cesium's are