Re: [time-nuts] Low noise quartz crystal oscillator by Bruce Griffiths
This oscillator seems to have been more a frequency standard then a noise
standard. Today's 10 MHz oscillators are different/better, such a crystal is
no longer available/made.
I have more experience with 100 MHz, 125 and 128 MHz. Once I am back in the
USA I will send some measured results and comments.
Thank for this reference :
http://www.hpl.hp.com/hpjournal/pdfs/IssuePDFs/1981-03.pdf
Ulrich
In a message dated 10/28/2015 7:01:16 P.M. W. Europe Standard Time,
hmurray@megapathdsl.net writes:
richard@karlquist.com said:
The 2N5179 in the 10811 is selected for minimum beta and Ft at 20 mA,
which
is the start up condition due to the ALC being at full gain. It has a
special HP part number, so you wouldn't know this just looking at the
parts
list.
How much of a difference does that selection step make?
I'd expect the parts within a batch to be very similar, more so for mature
parts.
--
These are my opinions. I hate spam.
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Am 28.10.2015 um 19:22 schrieb KA2WEU--- via time-nuts:
This oscillator seems to have been more a frequency standard then a noise
standard. Today's 10 MHz oscillators are different/better, such a crystal is
no longer available/made.
Yes. Rubiola gives it the credit of being able to be mass-produced, and
it was
one successful product. There is a section in "hacking oscillators" on it;
my copy of the book is 200 miles away right now.
regards,
Gerhard, DK4XP
(see www.rubiola.org)
Do you have a specific URL for "hacking oscillators"? I can't
find it on Rubiola's web site.
Rick
On 10/28/2015 1:32 PM, Gerhard Hoffmann wrote:
Am 28.10.2015 um 19:22 schrieb KA2WEU--- via time-nuts:
This oscillator seems to have been more a frequency standard then a noise
standard. Today's 10 MHz oscillators are different/better, such a
crystal is
no longer available/made.
Yes. Rubiola gives it the credit of being able to be mass-produced, and
it was
one successful product. There is a section in "hacking oscillators" on it;
my copy of the book is 200 miles away right now.
regards,
Gerhard, DK4XP
(see www.rubiola.org)
Hi Rick,
any info on how Wenzel makes that low noise oscillators?
73
KJ6UHN
Alex
On 10/28/2015 3:04 PM, Richard (Rick) Karlquist wrote:
Do you have a specific URL for "hacking oscillators"? I can't
find it on Rubiola's web site.
Rick
On 10/28/2015 1:32 PM, Gerhard Hoffmann wrote:
Am 28.10.2015 um 19:22 schrieb KA2WEU--- via time-nuts:
This oscillator seems to have been more a frequency standard then a
noise
standard. Today's 10 MHz oscillators are different/better, such a
crystal is
no longer available/made.
Yes. Rubiola gives it the credit of being able to be mass-produced, and
it was
one successful product. There is a section in "hacking oscillators"
on it;
my copy of the book is 200 miles away right now.
regards,
Gerhard, DK4XP
(see www.rubiola.org)
time-nuts mailing list -- time-nuts@febo.com
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10/28/15
Am 28.10.2015 um 23:04 schrieb Richard (Rick) Karlquist:
Do you have a specific URL for "hacking oscillators"? I can't
find it on Rubiola's web site.
It is a chapter in his book where he analyzes the form of the noise spectra.
6 - Oscillator hacking pp. 150-191 -
http://ebooks.cambridge.org/chapter.jsf?bid=CBO9780511812798&cid=CBO9780511812798A053
2 Oscillator hacking - http://arxiv.org/pdf/physics/0502143.pdf
A weird example; The effect of the output buffer; Oscillator hacking -
http://rubiola.org/pdf-slides/2009T-MPQ-Short-course-on-stable-oscillators.pdf
hth
Ulli
Am 28.10.2015 um 23:04 schrieb Richard (Rick) Karlquist:
Do you have a specific URL for "hacking oscillators"? I can't
find it on Rubiola's web site.
Rick
That's chapter 6 of his book.
http://rubiola.org/indexx-oscillator-noise.html
Just scroll down for the phase noise plots.
The left hand column of plots contains the essentials.
Adrian
Richard (Rick) Karlquist schrieb:
Do you have a specific URL for "hacking oscillators"? I can't
find it on Rubiola's web site.
Rick
On 10/28/2015 1:32 PM, Gerhard Hoffmann wrote:
Am 28.10.2015 um 19:22 schrieb KA2WEU--- via time-nuts:
This oscillator seems to have been more a frequency standard then a
noise
standard. Today's 10 MHz oscillators are different/better, such a
crystal is
no longer available/made.
Yes. Rubiola gives it the credit of being able to be mass-produced, and
it was
one successful product. There is a section in "hacking oscillators"
on it;
my copy of the book is 200 miles away right now.
regards,
Gerhard, DK4XP
(see www.rubiola.org)
time-nuts mailing list -- time-nuts@febo.com
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It's chapter 6 in his phase noise book.
Cheers,
Magnus
On 10/28/2015 11:04 PM, Richard (Rick) Karlquist wrote:
Do you have a specific URL for "hacking oscillators"? I can't
find it on Rubiola's web site.
Rick
On 10/28/2015 1:32 PM, Gerhard Hoffmann wrote:
Am 28.10.2015 um 19:22 schrieb KA2WEU--- via time-nuts:
This oscillator seems to have been more a frequency standard then a
noise
standard. Today's 10 MHz oscillators are different/better, such a
crystal is
no longer available/made.
Yes. Rubiola gives it the credit of being able to be mass-produced, and
it was
one successful product. There is a section in "hacking oscillators" on
it;
my copy of the book is 200 miles away right now.
regards,
Gerhard, DK4XP
(see www.rubiola.org)
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.
Hi
They do it pretty much the same way everybody else makes the same
sort of oscillators. Design, build, tune / select, test, re-tune/ select, re-test.
The amount of test / tune depends enormously on what level of oscillator
is being made. > 80% of the volume shipped gets relatively less effort than
the other 20%.
Bob
On Oct 28, 2015, at 6:24 PM, Alexander Pummer alexpcs@ieee.org wrote:
Hi Rick,
any info on how Wenzel makes that low noise oscillators?
73
KJ6UHN
Alex
On 10/28/2015 3:04 PM, Richard (Rick) Karlquist wrote:
Do you have a specific URL for "hacking oscillators"? I can't
find it on Rubiola's web site.
Rick
On 10/28/2015 1:32 PM, Gerhard Hoffmann wrote:
Am 28.10.2015 um 19:22 schrieb KA2WEU--- via time-nuts:
This oscillator seems to have been more a frequency standard then a noise
standard. Today's 10 MHz oscillators are different/better, such a
crystal is
no longer available/made.
Yes. Rubiola gives it the credit of being able to be mass-produced, and
it was
one successful product. There is a section in "hacking oscillators" on it;
my copy of the book is 200 miles away right now.
regards,
Gerhard, DK4XP
(see www.rubiola.org)
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.
No virus found in this message.
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Version: 2016.0.7163 / Virus Database: 4457/10906 - Release Date: 10/28/15
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On 10/28/15 4:29 PM, Adrian wrote:
That's chapter 6 of his book.
http://rubiola.org/indexx-oscillator-noise.html
Just scroll down for the phase noise plots.
The left hand column of plots contains the essentials.
Adrian
what would be nice is some similar simple analysis for lower performing
oscillators.. (like the oscillator in a PC, or run of the mill 1-10 ppm
TCXOs)
tvb has some on his website.
I guess there's stuff around, but it's not all gathered together.