You seem to underestimate the amount of work it costs to first build the infrastructure
it takes to develop a state of the art oscillator and then do multiple iterations of both
the oscillators and the multipliers. That is counted in man months.
I find it offensive to ask Andrea and the moderators to service you with outdated
information, while you are not even willing to take the 20 minutes to go back a few
pages and look it up yourself, much less than reading the thread.
This here is diy, not Alibaba.
Gerhard
it takes to develop a state of the art oscillator and then do multiple iterations of both
the oscillators and the multipliers. That is counted in man months.
I find it offensive to ask Andrea and the moderators to service you with outdated
information, while you are not even willing to take the 20 minutes to go back a few
pages and look it up yourself, much less than reading the thread.
This here is diy, not Alibaba.
Gerhard
Hi Gerhard,
thank you to explain the heavy work is needed to develop and test a true low phase noise oscillator.
You are more than right, we have done at least 4-5 iterations of each oscillator and we are investigating the best way to build a frequency doubler that only adds the theoretically 6dB of phase noise, although we don't need any doubler for the audio system we are building (our DAC operates at 5/6 MHz), so we are building it for the audio community, not for us.
Anyway, as soon as oscillators and doubler will be ready I'll try to update the first post adding all the information about each device.
Please, be patient… and stay tuned.
Andrea
To understand the complexity and the hard work developing a state of the art oscillator, please, take a look at the price of Oscilloquartz BVA 8607 or Wenzel BT ULN. These are the SOTA oscillators on the market and they are very very expensive, several thousands of USD/Euro.
As an example, this is just the Oscilloquartz BVA 8600, they ask Euro 4200 for a used part with worse phase noise performance against the SOTA 8607
OSA OSCILLOQUARTZ BVA 8600 quartz crystal oscillator FREQUENCY STANDARD | eBay
As an example, this is just the Oscilloquartz BVA 8600, they ask Euro 4200 for a used part with worse phase noise performance against the SOTA 8607
OSA OSCILLOQUARTZ BVA 8600 quartz crystal oscillator FREQUENCY STANDARD | eBay
The BVAs are no longer made. The have left quite a void.
There are new ones from both Morion, St. Petersburg and
Racon, England. Esp. good close to the carrier.
The prices for one are far in the 5 digit €.
Even if you have the money, that does not mean that you get one.
It is not a circuit trick, you need a different crystal, far beyond SC.
BTW I had bought a BVA on *bay, turned out to be defective.
Luckily I had no problem to return it.
Cheers, Gerhard
There are new ones from both Morion, St. Petersburg and
Racon, England. Esp. good close to the carrier.
The prices for one are far in the 5 digit €.
Even if you have the money, that does not mean that you get one.
It is not a circuit trick, you need a different crystal, far beyond SC.
BTW I had bought a BVA on *bay, turned out to be defective.
Luckily I had no problem to return it.
Cheers, Gerhard
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THIS is the way to handle such a long an complex thread. And I'm sure that will also result in added orders and interest in your project. THANKS!
I'm sorry Gerhard, but I find your response COMPLETELY CONFUSED.
Look at the first post. The last sentence reads:
"TWTMC project. For Schematics, BOM, PCB and Assembly guide see post #1506".
And that sentence isn't even hyperlinked. One has to manually search for post 1506. And when one finds that post, it is dated Oct. 2017. Does that mean none of the PDFs have NOT been amended since 2017?
Believe it or not, a user-friendly interface (such as the one I suggest about making the TS all inclusive) reflects (positively or negatively) on the entire project design. Indeed a clunky web interface, with information dispersed all heater-skelter throughout a long thread. One thinks: if the web interface is this confusing, how efficacious (hence) might the actual project be?
I'm sorry but,i agree with Gerhard, when a subject interests me I take the time to read it in full before i blame.......😱
On this subject, Andrea I followed the beginning DIYHiFi.org • View topic - To clock or not to clock, that is the question...
On this subject, Andrea I followed the beginning DIYHiFi.org • View topic - To clock or not to clock, that is the question...
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Say, I have a Philips CD player with SAA7220 and TDA1541A, and I want to upgrade the clock.
PRICE NO OBJECT. EFFORT NO OBJECT.
I would choose ST cut Laptec 11.289 Mhz. But which TWTMC circuit should I opt for:
TWTMC-D
TWTMC-C
TWTMC-P
PRICE NO OBJECT. EFFORT NO OBJECT.
I would choose ST cut Laptec 11.289 Mhz. But which TWTMC circuit should I opt for:
TWTMC-D
TWTMC-C
TWTMC-P
I don't understand ... are you saying you used this $$ instrument to fine tune TWTMC projects?
Were any objectives captured (measurements, graphs, screen shots).
Andra is making the point that a true SOTA oscillator is a difficult and expensive undertaking. The lead time for the BVA's is over 1 year. The Wenzels are a little quicker and they both have tradeoffs. the BVA is better for close in phase noise and the Wenzel is much better broadband. The performance is published and you can see comparisons here:
Oscilloquartz 8607-008 BVA Oscillator Wenzel 5 and 10 MHz Ultra Low Noise Oscillators
Given the experience and resources these companies have brought to the task don't expect a quick project to get to the same place. And audio does not need all of those performance requirements.
Oscilloquartz 8607-008 BVA Oscillator Wenzel 5 and 10 MHz Ultra Low Noise Oscillators
Given the experience and resources these companies have brought to the task don't expect a quick project to get to the same place. And audio does not need all of those performance requirements.
+1; Bravo and I am thankfull also for all the inputs you provided since the beginning.
that's what & why I tried to make understand as well few posts above with more or less some humor, which is always difficult because it's about culture and this is not universal. But some people seem to think they have rights and no duties. At least zero education and do not understand as fastly they desire !
Some want a menu and fas(r)t food delivry and not just good food that asks months of slow coocking - whatever the oven- ?! I say : print it yourself and go to Mac Donald!
Sorry, but my fingers were itching more than my ears ! No education, nore decent is feding up me after a some time.
Sorry btw, Andrea is certainly more patient and tolerant that I am. And as someone I consider here for his kindness and his postcards and whom signature talks about friendship and Dalai Lama... I dare at the oposit the step beyond : if you feel hurry, indeed go to Alibaba, Tobao and pay for a pale copy, minute made as a printer ! 😡
I apologize but I feel better !
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How about #2093, #2044
Could have been found by simply reading it.
Gerhard
--
Businessmen, they drink my wine, plowmen dig my earth
None of them along the line know what any of it is worth”
Some more context to the NIST doubler
< http://www.darksmile.net/ee/NIST_UL...NTHESIZER_FOR_DIODE_LASER_PUMPED_RUBIDIUM.pdf >
There is a lot of interesting stuff on the web server of the NIST timefreq group.
The URLs are a moving target and the filenames don't tell much: 123456.pdf.
Use the google site: feature for some orientation.
< http://www.darksmile.net/ee/NIST_UL...NTHESIZER_FOR_DIODE_LASER_PUMPED_RUBIDIUM.pdf >
There is a lot of interesting stuff on the web server of the NIST timefreq group.
The URLs are a moving target and the filenames don't tell much: 123456.pdf.
Use the google site: feature for some orientation.
The NIST doubler is quite simple construction ... if you supplement with proper filtering on output.
Attachments
The OLD FASHIONED WAY.
--
Sorry, but it ain't worth my time to search for messages the OLD FASHIONED WAY.
If you want to impress, try using hyperlinks.
PSSSSSTT: That's why the Internet was invented 😉
--
Sorry, but it ain't worth my time to search for messages the OLD FASHIONED WAY.
If you want to impress, try using hyperlinks.
PSSSSSTT: That's why the Internet was invented 😉
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