Here's a link to data on an 8607-008. You may recognize the bottom plot
from a recent posting. :-) But the ADEV and PN data at the top of the
page is from the factory test data. The ADEV doesn't explicitly say so,
but I strongly believe it's based on comparison with a "gold standard" 8607.
Hi
Obviously you need two more 8607’s ….. :)
I suspect you are correct and the OCXO is doing better than the close in data
suggests.
Bob
> On Feb 4, 2018, at 8:33 AM, Tom Van Baak wrote:
>
> FYI: here's an old plot where I evaluated an Oscilloquartz 8607 BVA against a
> H-maser. It gets do
Hi
> On Feb 4, 2018, at 7:13 AM, Poul-Henning Kamp wrote:
>
>
> In message <480971424.644410.1517715556...@webmail.xtra.co.nz>, Bruce
> Griffiths
> writes:
>
>> It has been used to machine/polish crystal quartz waveplates and
>> to machine/polish the surface of silicon wafers before u
FYI: here's an old plot where I evaluated an Oscilloquartz 8607 BVA against a
H-maser. It gets down to 8e-14 but is likely a bit better. On this plot, I
suspect the short-term numbers were not the BVA oscillator or the TSC 5110A
analyzer, but the H-maser.
/tvb
__
In message , Bob kb8tq writes:
>If you try “normal” machining techniques on a resonator, you are very
>likely to create micro cracks in the material. Those are *really* bad for
>aging and a few other issues …..
So that brings me to another question:
We use quartz crystals in very simp
In message <480971424.644410.1517715556...@webmail.xtra.co.nz>, Bruce Griffiths
writes:
>It has been used to machine/polish crystal quartz waveplates and
>to machine/polish the surface of silicon wafers before uses for
>MEMS fabrication. Its even been used to carve channels in silicon
>w
There is abrasive entrained in the fluid stream. Operation is in the ductile
grinding regime so fluid pressures are around 6 bar or so, way below that used
in abrasive water jet cutting.
It has been used to machine/polish crystal quartz waveplates and to
machine/polish the surface of silicon wa
Hi
Anything like a laser that generates heat to do the “work” will twin the
quartz.
Once you do that, it’s pretty much useless as a resonator. The same issue
gets you in trouble trying to wire bond to a resonator.
Bob
> On Feb 3, 2018, at 9:46 PM, Hal Murray wrote:
>
>
> kb...@n1k.org sai
kb...@n1k.org said:
> Unfortunately ( at the rates you must use) the âblast it with a fire hoseâ
> approach is not very fastâ¦..
How fast to laser blasters work and/or how much do they damage the crystal?
--
These are my opinions. I hate spam.
Hi
Unfortunately ( at the rates you must use) the “blast it with a fire hose”
approach
is not very fast…..
Bob
> On Feb 3, 2018, at 8:15 PM, Bruce Griffiths
> wrote:
>
> Fluid jet polishing perhaps?
>
> At least on fused quartz and optical glass there is no associated subsurface
> damage.
Fluid jet polishing perhaps?
At least on fused quartz and optical glass there is no associated subsurface
damage.
Bruce
>
> On 04 February 2018 at 14:05 Bob kb8tq wrote:
>
> Hi
>
> If you try “normal” machining techniques on a resonator, you are very
> likely to create micro
Hi
If you try “normal” machining techniques on a resonator, you are very
likely to create micro cracks in the material. Those are *really* bad for
aging and a few other issues ….. Much of the normal production flow of the
quartz is designed to keep the processes like sawing far enough away
from
In message <0f9a9acc-4cdf-780f-e633-616262264...@earthlink.net>, jimlux writes:
>> [1] Surprising to me is that modern dentists are highly kitted for
>> CNC-ing very hard ceramic materials at high precision.
>
>But, small "tooth sized" pieces - how big is your crystal.
Well, they appeara
On 2/3/18 3:31 PM, Poul-Henning Kamp wrote:
In message <31183984-ed9d-60e1-6528-76dfde5f3...@rubidium.dyndns.org>, Magnus D
anielson writes:
The slots and thus the remaining bridges seems to have been a relatively
simple stage of the process. Orientation of the blank seems to have been
Hi
Back when the BVA was up for sale, by far the biggest issue was the machining
involved
in making those slots. They don’t just have to be slots. They have to be very
precise. Etching
will not do the trick. Neither will most machining processes. Electrode shape
changes have
been part of resona
In message <31183984-ed9d-60e1-6528-76dfde5f3...@rubidium.dyndns.org>, Magnus D
anielson writes:
>The slots and thus the remaining bridges seems to have been a relatively
>simple stage of the process. Orientation of the blank seems to have been
>simple. The shapes for the electrodes seems
Hi,
The slots and thus the remaining bridges seems to have been a relatively
simple stage of the process. Orientation of the blank seems to have been
simple. The shapes for the electrodes seems to have been worse.
Cheers,
Magnus
On 02/03/2018 11:34 PM, Bob kb8tq wrote:
> Hi
>
> The “BVA” part o
Hi
The “BVA” part of the name refers to the slots machined into the crystal blank
to manage the mounting stress on the resonator. Both the “plated on the blank”
and the “electrodes off blank” versions are legit BVA approaches. Indeed the
electrode off the blank version is the more expensive (and
On Fri, 2 Feb 2018 11:02:27 -0800
wrote:
> Anyone priced a Rakon HSO-14 option 8.
>
> It's the Oscilloquartz 8607 option 8 replacement.
>
> I'm almost afraid to ask!
I do not know the HSO-14, but when I asked what the 8607 costs new, I
got ~5000 CHF for the "lowest" grade and over 14k CHF for
Hi,
Anyone priced a Rakon HSO-14 option 8.
It's the Oscilloquartz 8607 option 8 replacement.
I'm almost afraid to ask!
Cheers,
Corby
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