Hi
There are a number of papers on LED / Laser excitation of Rb cells (and
other gas cells). They go back quite a ways. The gotcha (as pointed out
in PHK’s post) is that you need to stabilize the LED source. Doing that is
a bit complex. Doing that so that the result beats a gas lamp is a bit mo
In message <20180221184928.1c9b4c3a4d2e762970b5b...@kinali.ch>, Attila Kinali w
rites:
>So the Rb85 "notch" filter might not get rid of all the unwanted light
>and some of this might depopulate the excited state of the Rb87
>that are in the RF cavity.
I have a hard time seeing how you ca
Attila,
The Child and oven windings were destroyed pulling the oven cylinders out
of the potting.
I suppose you could replicate them and try to repot but I'm never going
to try!
Cheers,
Corby
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Attila I haven't tried that and I suspect the lines are important because
that establishes the reference.
Now I would also suggest that an experiment like you suggest be tried on a
FRS-XXX cheapy Rb.
Easily dis-assembled and can be re-assembled back with the lamp. No harm.
Paul
WB8TSL
On Wed, Feb
Moin,
Has anyone ever tried using a LED instead of a discharge lamp for Rb standards?
There are quite a few and very cheap 780nm IR LEDs available. They usually
have a line width in the order of 20nm to 50nm (FWHM). This means that they
still need the Rb85 filter, but they would not produce all th
On Wed, 21 Feb 2018 15:37:53 +
"Poul-Henning Kamp" wrote:
> I was talking about driving the single-transistor UHF generator which
> ionizes the Rb in the lamp, so far I have not even established if
> this voltage affects the HP5065 performance in the first place.
Oops... sorry, I missed that
In message <20180221163511.b8d6eec26415fe16e66e4...@kinali.ch>, Attila Kinali w
rites:
>On Tue, 20 Feb 2018 09:36:49 -0700
>Mark Goldberg wrote:
>
>> I don't know anything about these devices, but for TCXOs, the power supply
>> noise significantly affects the phase noise of the output. An
WRT Rb on the envelope, the 5065A has a built in 'cold trap' to recover the Rb
into the reservoir, Instructions on use are in the manual
Content by Scott
Typos by Siri
On Feb 21, 2018, at 10:33 AM, Attila Kinali wrote:
On Tue, 20 Feb 2018 10:03:20 -0800
wrote:
> You do NOT want to take on
On Tue, 20 Feb 2018 09:36:49 -0700
Mark Goldberg wrote:
> I don't know anything about these devices, but for TCXOs, the power supply
> noise significantly affects the phase noise of the output. An LM317 is not
> well specified for noise and I expect is is orders of magnitude worse than
> somethin
On Tue, 20 Feb 2018 10:03:20 -0800
wrote:
> You do NOT want to take one apart to this level!
>
> It's never going to operate again.
Why not? Is there something you had to break to open it up this far?
Attila Kinali
--
It is upon moral qualities that a society is ultima
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