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The Well Tempered Master Clock - Group buy

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B

Baka

Member
Joined 2005
- andrea_mori: 2 x AT 11.2896 MHz + 2 x SC 5.6448 MHz + 2 x SC 6.144 MHz + 2 x SC 12.288 MHz + 2 x SC 90.3168 MHz + 2 x SC 98.304 MHz
+ 4 x TWTMC-D + 4 x TWTMC-OVN + 2 x TWTMC-D&D
- canvas: 4*TWTMC-D, 4*TWTMC-OVN, 2 x TWTMC All-in-One (bare board), 1 x SC 22.5792 MHz, 1 x SC 24.5760 MHz
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D + 1 x TWTMC AIO PCB + 1 x AT 11.2896 MHz + 1 x AT 12.288 MHz
- gabor80: 1 x TWTMC-C + 2 x TWTMC-D + 2 x TWTMC-OVN + 2 x TWTMC-DIL Dil adapter + 1 x SC 45.1584 MHz + 1 x SC 49.1520 MHz + 1 x AT 11.2896 MHz
- xaled: 6 x TWTMC-D + 6 x TWTMC-OVN + 3 x TWTMC-D&D
- MadKid: 1x SC 22.5792 MHz, 1x SC 24.5760 MHz
- spm (updated) : -, 90.3168 MHz SC-cut x 1 ,98.304 MHz SC-cut x1 , TWTMC-D x 10, TWTMC-OVN x 6, TWTMC-P x 4, TWTMC-D&D x 2, TWTMC-OVN x 6, TWTMC-DIL x 4
- shendrik:1 x AT 45.1584 MHz + 1 x AT 49.1520 MHz + 1 x SC 45.1584 MHz + 1 x SC 49.1520 MHz
- tagheuer: 2 x TWTMC-OVN
- Baka: 1 x SC 22.5792 MHz; 2 x TWTMC-D
- Clsidxxl: 2 x TWTMC-D + 2 x TWTMC-OVN + 1 SC 22.5792 MHz + 1 SC 24.5760 MHz
- BDL: 2 x AT 11.2896 MHz + 1 x AT 22.5792 MHz + 1 x AT 24.5760 MHz + 1 x TWTMC-C PCB + 3 x TWTMC-D PCB + 4 x TWTMC-P PCB + 2 x TWTMC-AIO PCB + 1 x TWTMC-D&D PCB + 1 x TWTMC-OVN PCB + 2 x TWRPS-pp micro PCB
- duster1: 1 x SC 90.3168 MHz, 1 x SC 98.304 MHz, 8 x TWTMC-D, 2 x TWTMC-P, 1 x TWTMC-D&D, 4 x TWTMC-OVN
- triodehunter: 2 x SC-22.5792 MHz 3rd overtone, 2 x SC-24.5760 MHz 3rd overtone, 4 x TWTMC-D, 4 x TMTMC-OVN, 2 x TWTMC-D&D
- hsi68: 1 x SC 90.3168 MHz, 1 x SC 98.304 MHz, 2 x TWTMC-D, 2 x TWTMC-OVN
- Sligolad: 1 x SC 22.5792 MHz, 1 x SC 24.5760 MHz, 1 x SC 45.1584 MHz, 1 x SC 49.1520 MHz, 2 x TWTMC-D&D, 4 x TWTMC-D
- Crom: 1 x TWTMC All-in-One with the upgraded crystals
- rickmcinnis: 1 x TWTMC All-in-One with the upgraded crystals
- minionas: 1 x SC 45.1584 MHz, 1 x SC 49.1520 MHz, 2 x TWTMC-D, 2 x TMTMC-OVN, 2 x TWTMC-DIL Dil adapter, 1 x TWTMC-D&D
- crowlie 4 x AT 11.2896 MHz, 1 x SC 22.5792 MHz
- GOR3: 2 x TWTMC All-in-One (bare board), 2 x SC 22.5792 MHz, 2 x SC 24.5760 MHz
- kazap: 1 x TWTMC All-in-One completed with the upgraded crystal
- system54 1x SC 22.5792 MHz, 1x SC 24.5760 MHz, 1x AT 25.000 Mhz, 2 x TWTMC -D, 1x TWTMC -P, 2x TWTMC -D&D
- flowerpot 2 x AT 45.1584 MHz, 2 x AT 49.1520 MHz, 1 x AT 90.3168 MHz, 1 x AT 98.3040 MHz, 8 x TWTMC-D, 3 x TWTMC-D&D
- taisho_daniel 1 x TWTMC All-in-One completed, 1 x SC 45.1584 MHz, 1 x SC 49.1520 MHz
- ryanj: 1 x AT 11.2896 MHz
- twlai: 1x SC 22.5792, 1x SC 49.1520, 2x TWTMC -D, 2x TWTMC-D&D, 2x TWTMC-OVN
- Jp85 1x TWTMC-D&D,2X TWTMC Dil adapter, 2xTWTMC-D, 1xTWTMV-Ovn, 1xAt-cut 24.5760x 1xSc-cut 22.5792, TWRPS-pp mico pcb x2
- SPWONG: 1 x AT 11.2896 MHz, 1 x TWTMC-P
- grael: 1 x SC 45.1584 MHz, 1 x SC 49.1520 MHz, 4 x TWTMC-D bare PCB
- sts9: 1 x AT 22.5792 MHz, 1 x AT 24.5760 MHz, 2 x TWTMC-D, 1 x TWTMC-D&D
- ambrosia168: 1 x SC 90.3168 MHz
- lindamar: 4 x TWTMC-D + 4 x TWTMC-OVN + 2 x TWTMC-D&D + 4 TWTMC-DIL
- ppap64: 4 x TWTMC-D + 4 x TWTMC-OVN + 4 x TWTMC-D&D + 4 TWTMC-DIL + 1 x SC 45.1584 MHz + 1 X SC 49.1520 MHz
- Malvin: 1 x AT 11.2896 MHz, 1 x AT 22.5792 MHz, 1 x AT 24.5760 MHz, 1 x TWTMC-P, 2 x TWTMC All-in-One (bare board), 2 x TWTMC-OVN, 2 x TWTMC-D, 4 x TWTMC-DIL Dil adapter, 1 x TWTMC-D&D, 2 x TWRPS-pp micro PCB
- jptz: 1 x TWTMC-AIO (bare board), 4 x TWTMC-D, 2 x TWTMC-OVN, 1 x AT 22.5792 MHz, 1 x AT 24.5760 MHz, 1 x SC 45.1584 MHz, 1 x SC 49.1520 MHz
- Carmaux: 1 x SC 22.5792 MHz, 1 x SC 24.5760 MHz, 1 x SC 45.1584 MHz, 1 x SC 49.1520 MHz, 8 x TWTMC-D, 4 x TWTMC-OV
- Superberg: 2 x SC 45.1584 MHz, 2 x SC 49.1520 MHz, 4 x TWTMC-C, 4 x TWTMC-D, 4 x TWTMC-P, 2 x TWTMC-D&D, 2 x TWTMC-AIO, 4 x TWTMC-OVN, 8 x TWTMC-DI, 4 x TWRPS-pp micro PCB
- Rookie: 1 x SC 45.1584 MHz, 1 x SC 49.1520 MHz, 2 x TWTMC-D, 1 x TWTMC-D&D, 2 x TWTMC-OVN
- roender: 1xAT 45.1584 MHz, 1x AT 49.1520 MHz, 2x TWTMC-AIO. If AT cut can't be ordered then please replace the cristals with SC cut at the same freq
- lindamar: 1 x AT 11.2896 MHz + 1 x SC 5.6448 MHz + 1 x SC 90.3168 MHz + 1 x SC 98.304 MHz
- Vil : 1x SC 22.5792 MHz, 1x SC 24.5760 MHz

Updated and ordering form sent
 
A

Abra

Member
Joined 2015
Hello Andrea,

Can you tell me please the estimated delivery time of 98.3040 MHz or 90.3168 MHz, ovenized SC-cut Discol type solution?
I intend to use it in my diyinhk.com ES9038PRO card, replacing the factory 80MHz NDK clock. I also have 100MHz Crystek 945 (sine wave output), and 100MHz Abracon NBLNO to compare.

I would like to replace the 24.0000MHz clock of my Cubietruck music server too. Please let me know if you have any oscillator solution or suggestion for this non audio standard frequency. The Cubietruck uses 24.0000Mhz main clock for many purposes, so I have to keep exactly this freq. The 22.5792MHz and 24.5760MHz I2S clocks are also diveded/multipled from here.

Thanks
 
andrea_mori

andrea_mori

Banned
Joined 2005
I have a few 90/98 MHz SC-Cut crystals left from the last GB, so they can be delivered as soon as I will receive them from the manufacturer, I think within April 15th (if you are planning to build yourself the oscillators). If you want me to build the oscillators for you it takes at least one more month.

24 MHz AT-Cut crystals could be used in all the three oscillators, Colpitts-Clapp Driscoll and Pierce, although I believe at such that frequency the Pierce is the best solution.
The problem is that I have no crystals in stock or in order at 24 MHz, and the manufacturer asks at least 10 pcs MOQ.
If I remember correctly there was other members interested in this frequency, so you could start a new GB to see what happen (unless you would get all 10 pcs).
 
A

Abra

Member
Joined 2015
Thank you for the promt reply.

The 24.0000MHz one has more important role, and also much harder to find.
As I neither want to organise GB, nor want to buy 10pcs, I just bought a NDK/NIHON TCXO from ebay to compare to the original noname oscillator.

Do you think the OCXO version is the musically best performer on your list?
Any measurement available?
 
andrea_mori

andrea_mori

Banned
Joined 2005
Abra said:
Thank you for the promt reply.

The 24.0000MHz one has more important role, and also much harder to find.
As I neither want to organise GB, nor want to buy 10pcs, I just bought a NDK/NIHON TCXO from ebay to compare to the original noname oscillator.

Do you think the OCXO version is the musically best performer on your list?
Any measurement available?
Click to expand...

Around 100 MHz with high ESR overtone crystals (AT-Cut and SC-Cut) I believe the emitter coupled oscillator is the best way, since it maximizes the loaded Q.

No measurement, I can't afford a 100000 USD Agilent E5052B.
 
A

Abra

Member
Joined 2015
andrea_mori said:
Around 100 MHz with high ESR overtone crystals (AT-Cut and SC-Cut) I believe the emitter coupled oscillator is the best way, since it maximizes the loaded Q.

No measurement, I can't afford a 100000 USD Agilent E5052B.
Click to expand...

I understand that 10000$ instruments are not tipical in the diyers community.

The 100MHz question remained to decide:
1. AT-Cut or SC-Cut?
2. Oven or not oven?
3. Driscoll or not?

I hope next week I can test the Crystek and Abracon oscillators with my audio buddy. We will discuss if he can do the soldering job with a shorter delivery time. If not, I need your help to do it, as I'm not a diyer at all.

Thanks
 
andrea_mori

andrea_mori

Banned
Joined 2005
Abra said:
I understand that 10000$ instruments are not tipical in the diyers community.

The 100MHz question remained to decide:
1. AT-Cut or SC-Cut?
2. Oven or not oven?
3. Driscoll or not?

I hope next week I can test the Crystek and Abracon oscillators with my audio buddy. We will discuss if he can do the soldering job with a shorter delivery time. If not, I need your help to do it, as I'm not a diyer at all.

Thanks
Click to expand...

1. I have not AT-Cut crystals at 90/98 MHz in stock, so SC-cut only, as soon as they arrive
2. Different points of view on this matter, personally I would use the oven
3. Colpitts-Clapp does not work with 90/98 MHz SC-Cut crystals, Pierce.. I don't know, not yet tested. It works with AT-Cut at these frequencies, but it's not recommended.
 
andrea_mori

andrea_mori

Banned
Joined 2005
GOR3 said:
Andrea,
On the TWTMC-AIO board, am I correct that resistors R11/R31 are adjusted for the correct collector voltage before the crystals are installed?
Thanks,
George
Click to expand...

Yes, you are right. 6.8K should be almost correct for 22/24 MHz Laptech AT-Cut crystal and MMBT5179 bjt.

With different crystals/frequencies these resistors have to be adjusted to get around half Vcc at Q1 collector.
 
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