> On Jul 29, 2015, at 11:23 AM, Mike Niven <mfni...@ymail.com> wrote: > > Thanks for the comment Bob. Tracing Efratom through the ages, I see they are > now Microsemi. I wonder whether they will still have a lamp for such a > geriatric Rb source and at what price - probably more than the cost of the > complete Racal 9475? I will follow it up anyway as I hardly ever see working > or scrap FRKs for sale in the UK.
Hi I believe that the last lamps I bought were when the devices were still in their catalog (no web sites back then). Price was in the $300 to $600 range for a bulb. I simply do not remember the exact price from 20+ years ago. Bob > -------------------------------------------- >> On Tue, 28/7/15, Bob Camp wrote: >> >> Hi >> >> The Efratom bulbs have a “magic mix” of gas in them. The only place I have >> ever >> bought them is direct from Efratom. They were fairly expensive back in the >> early 90’s … >> >> Bob >> >>> On Jul 28, 2015, at 9:56 AM, Mike Niven <mfniven at ymail.com> wrote: >>> >>> Would anyone know of a source of the Rubidium bulb fitted in the Efratom >>> FRK (and probably other FRx) standards? I have repaired and refurbished my >>> Racal 9475, which is fitted with the older style FRK (not -H or -L) module. >>> It is working properly at present but the lamp voltage is down to 5.5V, >>> which is below the stated minimum of 6V. I have tried rejuvenating the >>> bulb using a hot air gun, as described by Corby, but this has had no >>> obvious impact. Hence, I have little feel for how much life the existing >>> lamp has left and a spare would be good for my peace of mind. >>> >>> Many thanks. >>> >>> Mike >>> _______________________________________________ > _______________________________________________ > 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. _______________________________________________ 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.
