[time-nuts] Surplus Guidelines, was: Rubidium Standard
cfmd at bredband.net
Sun Dec 10 17:20:12 EST 2006
From: Robert_Deliën <robert at delien.nl>
Subject: Re: [time-nuts] Surplus Guidelines, was: Rubidium Standard
Date: Sun, 10 Dec 2006 22:12:51 +0100
Message-ID: <D891702134D46242B089F044A1C20CD1025DA6 at deuterium.delien.local>
> > > Isn't it deposited metal from the filament that blackens the glass?
> > No.
> > Therei is no filament. The Rubidium lamps are excited with a UHF field which is external to the bulb.
> I didn't know that: How interesting! Doesn't it take a greate amount of RF power to excite cold Rb?
No. For instance, on my R&S XSRM it is a fairly basic 100 MHz resonance setup
with a single transistor in the core. It is setup such that the RF coil is also
part of the resonator in a LC based oscillator. It is something like 1 W, which
is also what the literature say.
More information about the time-nuts