The Well Tempered Master Clock - Building a low phase noise/jitter crystal oscillator

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Hello Andrea,

Thank you so much for all your sharing time and work for the DIY communauty :).

Have a basic question about the crystal soldering operation please. I remember in a thread than Peufeu fellow advised copper/berylium plugs for dacs chips instead plastic and bad metal standalone dip plugs. My basic questions are :

Does a soldering with high temperature (370° C min) provided by the soldering can affet this Sota crystals and does it worth soldering instead such plugs (or put it in vias by force) for pluging mechanicly the crystal in it after (avoding heat stress soldering operation) ?

For the pcbs, does a simple 40/60 soldering is good enough ?
 
Last edited:
Can not continue with the project

- andrea_mori : 2 x 5.6448MHz + 2 x 11.2896MHz + 2 X 22.5792 MHz + 2 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz + 10 x PCB + 4 x daughter board PCB
- Eldam : 1 x 5.6448MHz + 1 X 22.5792 MHz + 1 x 24.576 MH + 2 x daughter board PCB + 4 x PCB
- esgigt : 1 x 11.2896 Mhz + 1 x PCB, soldered if possible
- fralippo : 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB + 1 x daughter board PCB
- mravinsky : 2 x 11.2896 Mhz + 2 x XO PCB + 1 x Daughter board PCB
- TNT : 1x22.5792MHz 1x24.5760MHz 1 x 49.152 MHz + 3 x PCB, + 2 x daughter board, all soldered if possible
- 1audio : 2x22.5792MHz 2x24.5760MHz + 2 x PCB + daughter board.
- randytsuch : 2x25.0000MHz + 4 x PCB + 1 x daughterboard
- myint67 : 1x11.2896mhz ,1x22.5792,1x45.1584,1x49.152 ,4 PCB ,2xdaughter board , soldered if possible
- kf_tam : 2x PCB
- BDL : 1 x 11.2896 MHz + 4 x PCB + 1 x daughter board PCB
- thorstenlarsen : 2 x 11.2896 MHz + 2 x PCB
- Zoran : 1x22.5792MHz 1x24.5760MHz + 2 x PCB, (soldered or not...) + 1 x 11.2896 MHz + 1 x PCB
- walangalam : 1 x 11.2896 Mhz + 2 x PCB
- AR2: 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB (soldering not needed)
- mcluxun: 1 x 22.5792 MHz and 1 x 24.576 MHz 1 x 45.1584 MHz + 1 x 49.152 MHz+ 2 x PCB + 1 x daughterboard (soldering if possible)
- damohpi: 1 x 11.2896 + 1x PCB unsoldered
- noizas : 2 x 5.6448MHz + 2 x 11.2896MHz + 4 x PCB
- badrisuper : : 1 x 11.2896 Mhz + 2 x PCB
- Clsidxxl: 1 x 45.1584 MHz + 1 x 49.152 MHz+daughter board + 2 x PCB (soldering if possible)
- zeta4 1x 22.5792Mhz + 1 x PCB (soldering not needed)
- chertk : 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB + 1 x daughter board
- hirez69: 1 x 22.5792 MHz and 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz + 4 x PCB (soldered) + 1 x daughter board
- palmito : 1 x 22.5792MHz 1 x 24.5760MHz + 1 x PCB + daughter board.
- gentlevoice: 1 x 6.144 MHz (see earlier PM) + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz
- naimster: 1x 22.5792 MHz + 1x 24.576 MHz + 2x PCB + 1x daughterboard (soldered if possible)
- zenelectro : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB's + 1 x daughterboard (soldered if possible)
- Ryssen : 1 x 24.576 MHz + 1 x PCB soldered
- flowerpot : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- jcastellano: Cancelled due to other priorities. Good luck to all.
- deanoUK : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- Miklos: 1 x 11.2896MHz + 2 x PCB + 1 x 16.9344 MHz
- Kannan_s:1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- Acko : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- tuyen : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB's + 1 x daughterboard (soldered if possible)
- Malvin : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- Marlowe: 3 x 16.9344Mhz + 3 x 25MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz + 1 x 22.5792 MHz + 1 x 24.576 MHz + 8 x PCB + 3 x daughter board PCB
- ppap64: 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board(soldered if possible)
- Superdad: 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB + 1 x daughter board (soldered if possible)
- ChrisMmm: 2 x 24.576 and 2 x PCB
 
Hello Andrea,

Thank you so much for all your sharing time and work for the DIY communauty :).

Have a basic question about the crystal soldering operation please. I remember in a thread than Peufeu fellow advised copper/berylium plugs for dacs chips instead plastic and bad metal standalone dip plugs. My basic questions are :

Does a soldering with high temperature (370° C min) provided by the soldering can affet this Sota crystals and does it worth soldering instead such plugs (or put it in vias by force) for pluging mechanicly the crystal in it after (avoding heat stress soldering operation) ?

For the pcbs, does a simple 40/60 soldering is good enough ?

Eldam,

there is a crystal socket you could use to avoid soldering the crystal
PQ 18 W - FISCHER ELEKTRONIK - SOCKET FOR CRYSTALS, PRECISION | Farnell element14 UK

BTW, I would solder the crystal to reach the best mechanical connection.
Obviously, one have to avoid to stress the crystal when soldering, doing a quick job, avoiding that high temperature damages the crystal.
To reach the best performance of this oscillator, once the crystal was soldered, it need some rest (a few days). Then you can power on the oscillator and leave it powered for some more days.

To solder SMD devices this tool could be one of the best
WES51 Apex Tool Group (Formerly Cooper Tools) | Mouser
but you can also use a regular 40/60 soldering tool, you have to use a thin tool.
 
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Joined 2004
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I would not worry about thermal stress on a crystal in a welded case. The crystal will Chanel frequency for the first few weeks of operation but you will need a really good measurement setup to see it.
The FM tuner trick will show microphonics and power supply hum real well. Measuring close in noise is very hard but can be done with two identical oscillators, however one needs to have a varactor to steer it and you will need real isolation amps or they will lock to each other and seem perfect.
 
- andrea_mori : 2 x 5.6448MHz + 2 x 11.2896MHz + 2 X 22.5792 MHz + 2 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz + 10 x PCB + 4 x daughter board PCB
- Eldam : 1 x 5.6448MHz + 1 X 22.5792 MHz + 1 x 24.576 MH + 2 x daughter board PCB + 4 x PCB
- esgigt : 1 x 11.2896 Mhz + 1 x PCB, soldered if possible
- fralippo : 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB + 1 x daughter board PCB
- mravinsky : 2 x 11.2896 Mhz + 2 x XO PCB + 1 x Daughter board PCB
- TNT : 1x22.5792MHz 1x24.5760MHz 1 x 49.152 MHz + 3 x PCB, + 2 x daughter board, all soldered if possible
- 1audio : 2x22.5792MHz 2x24.5760MHz + 2 x PCB + daughter board.
- randytsuch : 2x25.0000MHz + 4 x PCB + 1 x daughterboard
- myint67 : 1x11.2896mhz ,1x22.5792,1x45.1584,1x49.152 ,4 PCB ,2xdaughter board , soldered if possible
- kf_tam : 2x PCB
- BDL : 1 x 11.2896 MHz + 4 x PCB + 1 x daughter board PCB
- thorstenlarsen : 2 x 11.2896 MHz + 2 x PCB
- Zoran : 1x22.5792MHz 1x24.5760MHz + 2 x PCB, (soldered or not...) + 1 x 11.2896 MHz + 1 x PCB
- walangalam : 1 x 11.2896 Mhz + 2 x PCB
- AR2: 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB (soldering not needed)
- mcluxun: 1 x 22.5792 MHz and 1 x 24.576 MHz 1 x 45.1584 MHz + 1 x 49.152 MHz+ 2 x PCB + 1 x daughterboard (soldering if possible)
- damohpi: 1 x 11.2896 + 1x PCB unsoldered
- noizas : 2 x 5.6448MHz + 2 x 11.2896MHz + 4 x PCB
- badrisuper : : 1 x 11.2896 Mhz + 2 x PCB
- Clsidxxl: 1 x 45.1584 MHz + 1 x 49.152 MHz+daughter board + 2 x PCB (soldering if possible)
- zeta4 1x 22.5792Mhz + 1 x PCB (soldering not needed)
- chertk : 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB + 1 x daughter board
- hirez69: 1 x 22.5792 MHz and 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz + 4 x PCB (soldered) + 1 x daughter board
- palmito : 1 x 22.5792MHz 1 x 24.5760MHz + 1 x PCB + daughter board.
- gentlevoice: 1 x 6.144 MHz (see earlier PM) + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz
- naimster: 1x 22.5792 MHz + 1x 24.576 MHz + 2x PCB + 1x daughterboard (soldered if possible)
- zenelectro : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB's + 1 x daughterboard (soldered if possible)
- Ryssen : 1 x 24.576 MHz + 1 x PCB soldered
- flowerpot : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- jcastellano: Cancelled due to other priorities. Good luck to all.
- deanoUK : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- Miklos: 1 x 11.2896MHz + 2 x PCB + 1 x 16.9344 MHz
- Kannan_s:1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- Acko : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- tuyen : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB's + 1 x daughterboard (soldered if possible)
- Malvin : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- Marlowe: 3 x 16.9344Mhz + 3 x 25MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz + 1 x 22.5792 MHz + 1 x 24.576 MHz + 8 x PCB + 3 x daughter board PCB
- ppap64: 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board(soldered if possible)
- Superdad: 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB + 1 x daughter board (soldered if possible)
- ChrisMmm: 2 x 24.576 and 2 x PCB
-vita:1 x 24.576Mhz + 6 PCB
 
Hello Andrea and everyone,

sorry if my two questions are not part of this thread, but if you can answer briefly, your responses are welcome, because I use a converter rather old, a yamaha da2x, which has three clocks, in addition, the first oscillator crystal, has a frequency that is not common, 12.8 Mhz, so I'm going to order separately this crystal, there is also a programmable oscillator (exo 3c), and a VCO (fujitsu 18m432 d300).

-my question is: if I replace crystal 12.8 MHz,
by the clock of Andrea Mori, is that the result can be ruined by these other oscillators, or it is the first to set a good pace to the others?

-does it's worth, to more accurate clocks in a computer, or it's useless?

-for the test capacitor C8 of 50pF and resistance R0, are both components could not be permanently welded on the PCB, with a bridge, once the test performed,the bridge is moved.

Thank you,
Best Regards.
Stefano
 
I see in Laptech datasheet for HC/43 U crystal, they produce 3rd overtone crystal up to 110 MHz, so we can try the 100 MHz way.
The Clapp oscillator could be able to manage these frequencies, but I have never tested such high frequencies, so I cannot assure nothing. Also, my oscilloscope is a cheap 100 MHz, a little limited at such that frequencies.

BTW, if someone would try this way with me, taking the risk to fail, I add 2 more crystal in my desired list. If we will reach the minimum quantity for these frequencies I will ask the quote for them ( 90.3168 MHz and 98.304 MHz).

- andrea_mori : 2 x 5.6448MHz + 2 x 11.2896MHz + 2 X 22.5792 MHz + 2 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz + 1 x 90.3168 MHz + 1 x 98.304 MHz + 10 x PCB + 4 x daughter board PCB
- Eldam : 1 x 5.6448MHz + 1 X 22.5792 MHz + 1 x 24.576 MH + 2 x daughter board PCB + 4 x PCB
- esgigt : 1 x 11.2896 Mhz + 1 x PCB, soldered if possible
- fralippo : 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB + 1 x daughter board PCB
- mravinsky : 2 x 11.2896 Mhz + 2 x XO PCB + 1 x Daughter board PCB
- TNT : 1x22.5792MHz 1x24.5760MHz 1 x 49.152 MHz + 3 x PCB, + 2 x daughter board, all soldered if possible
- 1audio : 2x22.5792MHz 2x24.5760MHz + 2 x PCB + daughter board.
- randytsuch : 2x25.0000MHz + 4 x PCB + 1 x daughterboard
- myint67 : 1x11.2896mhz ,1x22.5792,1x45.1584,1x49.152 ,4 PCB ,2xdaughter board , soldered if possible
- kf_tam : 2x PCB
- BDL : 1 x 11.2896 MHz + 4 x PCB + 1 x daughter board PCB
- thorstenlarsen : 2 x 11.2896 MHz + 2 x PCB
- Zoran : 1x22.5792MHz 1x24.5760MHz + 2 x PCB, (soldered or not...) + 1 x 11.2896 MHz + 1 x PCB
- walangalam : 1 x 11.2896 Mhz + 2 x PCB
- AR2: 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB (soldering not needed)
- mcluxun: 1 x 22.5792 MHz and 1 x 24.576 MHz 1 x 45.1584 MHz + 1 x 49.152 MHz+ 2 x PCB + 1 x daughterboard (soldering if possible)
- damohpi: 1 x 11.2896 + 1x PCB unsoldered
- noizas : 2 x 5.6448MHz + 2 x 11.2896MHz + 4 x PCB
- badrisuper : : 1 x 11.2896 Mhz + 2 x PCB
- Clsidxxl: 1 x 45.1584 MHz + 1 x 49.152 MHz+daughter board + 2 x PCB (soldering if possible)
- zeta4 1x 22.5792Mhz + 1 x PCB (soldering not needed)
- chertk : 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB + 1 x daughter board
- hirez69: 1 x 22.5792 MHz and 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz + 4 x PCB (soldered) + 1 x daughter board
- palmito : 1 x 22.5792MHz 1 x 24.5760MHz + 1 x PCB + daughter board.
- gentlevoice: 1 x 6.144 MHz (see earlier PM) + 1 x 24.576 MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz
- naimster: 1x 22.5792 MHz + 1x 24.576 MHz + 2x PCB + 1x daughterboard (soldered if possible)
- zenelectro : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB's + 1 x daughterboard (soldered if possible)
- Ryssen : 1 x 24.576 MHz + 1 x PCB soldered
- flowerpot : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- deanoUK : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- Miklos: 1 x 11.2896MHz + 2 x PCB + 1 x 16.9344 MHz
- Kannan_s:1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- Acko : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- tuyen : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB's + 1 x daughterboard (soldered if possible)
- Malvin : 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board PCB
- Marlowe: 3 x 16.9344Mhz + 3 x 25MHz + 1 x 45.1584 MHz + 1 x 49.152 MHz + 1 x 22.5792 MHz + 1 x 24.576 MHz + 8 x PCB + 3 x daughter board PCB
- ppap64: 1 x 45.1584 MHz + 1 x 49.152 MHz + 2 x PCB + 1 x daughter board(soldered if possible)
- Superdad: 1 x 22.5792 MHz and 1 x 24.576 MHz + 2 x PCB + 1 x daughter board (soldered if possible)
- ChrisMmm: 2 x 24.576 and 2 x PCB
- vita:1 x 24.576Mhz + 6 PCB
 
Hi All

Thank you for your interrest in Assembly Service.
I'll be back soon to give further informations about the process.
Andrea's point is pretty clear, see Post #240.
We're working together for a comprehensive order form.
It will be published after checking configuration and BOM parts.

For technical/configuration details, please ask Andrea and read this great thread ;)

Regards

Phil
 
Laptech quote

I have just got the quote from Laptech.
Unfortunately, they increased the minimum orderable quantity:
10 pcs for all frequencies, except for 5.6448 MHz (15 pcs) and 6.144 MHz (100 pcs).

Attached the quote.

The final price for each crystal (including shipment from Canada and VAT 22%) is:
11.2896 MHz
16.9344 MHz
22.5792 MHz
24.576 MHz
25.00 MHz
33.8688 MHz
45.1584 MHz
49.152 MHz
MOQ 10 pcs, EUR 27.00 each

5.6448 MHz
MOQ 15pcs, EUR 29,00 each

About the 6.144 MHz, the minimum orderable quantity is too high.
 

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Thank you Andrea for the quotation,

Strange there are not more people for the 6.1 Mhz to have a true double frequency NOS DAC with a e.g. TDA1541 ... I have to say I hesitated myself to try more than one crystal here (I stay with the 5 M hz: the idea is of course to upsample the materials in the computer before).

I have two questions please,

- Do you think there will be any more customs taxes when the crystals shipment arrives in UE (around 30% with custom taxes + custom/transporter administrativ fees) ?
- Does the jitter stability really decrease with both: hardware upsampling and upper crystals Fhz ? (I mean for the crystals: does the stability (jitter, ageing...stability after one year of breaking/use) is better when the Fhz is lower ? 5 M hz VS 45 M hz ?)

I hesitate really between 22& 24M fhz crystals or the traditional 45/49 for the Distinction-1541 Dac board ? (first project is of course to keep it with the 5 M fhz to stay NOS on my 90% red book materials... but want to try both conf).

Any thought Andrea on this & the TDA-1541 please ?

Eldam
 
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Thank you Andrea for the quotation,

Strange there are not more people for the 6.1 Mhz to have a true double frequency NOS DAC with a e.g. TDA1541 ... I have to say I hesitated myself to try more than one crystal here (I stay with the 5 M hz: the idea is of course to upsample the materials in the computer before).

I have two questions please,

- Do you think there will be any more customs taxes when the crystals shipment arrives in UE (around 30% with custom taxes + custom/transporter administrativ fees) ?
- Does the jitter stability really decrease with both: hardware upsampling and upper crystals Fhz ? (I mean for the crystals: does the stability (jitter, ageing...stability after one year of breaking/use) is better when the Fhz is lower ? 5 M hz VS 45 M hz ?)

I hesitate really between 22& 24M fhz crystals or the traditional 45/49 for the Distinction-1541 Dac board ? (first project is of course to keep it with the 5 M fhz to stay NOS on my 90% red book materials... but want to try both conf).

Any thought Andrea on this & the TDA-1541 please ?

Eldam

Hi Eldam,

EUR 27.00 and 29.00 should be the final price, all including. You have only to add the shipment from Italy to final destination (I'll let you know later).
The only problem is to reach the minimum quantity for each frequency (eg. 15 pcs for the 5.6448 MHz, I could add 3 more pcs for myself)

About the clock frequency, tipically: the lower the frequency, the greater the Q, the lower the phase noise. You have to consider that if you start from higher frequency and divide down, theoretically the phase noise decrease 6dB for each division. In real world is not always true, anyway the division decrease the phase noise.

About the TDA1541A, its maximum clock frequency is around 6MHz, so you can use 5.6448 MHz or higher frequency divided down. As I said several time, I would think to a player system rather than a DAC, so IMHO the best way should be slaving the source.
 
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Hi Andrea,

Yes, thank you also for the quote. Interesting that the 6.1 MHz crystal has such a higher MOQ but that's apparently just the way it is.

Maybe I've missed this information elsewhere in the thread but how does things progress from here? Should I transfer money to you for the crystals I'd like to buy, or ...?

Thanks again Andrea for setting this in motion ;-)

Jesper
 
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