Almost two years ago I started a thread to investigate the opportunity for a diyer to build a real low jitter oscillator.
Nowadays a couple of GB have already gone, but since it seems there is still enough interest, to keep the discussion tecnical only on the main thread, I decided to start a separate thread for the group buy.
You can find every technical detail and related discussion on the master thread at The Well Tempered Master Clock - Building a low phase noise/jitter crystal oscillator - diyAudio
Available parts, prices and Order Form in post #883
The Well Tempered Master Clock - Group buy
Quick guide for GB in post #805
The Well Tempered Master Clock - Group buy
Order summary
TWTMC_Summary of Orders - Google Sheets
Nowadays a couple of GB have already gone, but since it seems there is still enough interest, to keep the discussion tecnical only on the main thread, I decided to start a separate thread for the group buy.
You can find every technical detail and related discussion on the master thread at The Well Tempered Master Clock - Building a low phase noise/jitter crystal oscillator - diyAudio
Available parts, prices and Order Form in post #883
The Well Tempered Master Clock - Group buy
Quick guide for GB in post #805
The Well Tempered Master Clock - Group buy
Order summary
TWTMC_Summary of Orders - Google Sheets
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Available parts
Following the list of the available parts and their prices.
Laptech crystals AT-Cut and SC-Cut in HC-43/U cold welded package
TWTMC-C Colpitts-Clapp AT-Cut crystal oscillator board suitable for frequencies from 5 MHz up to 50 MHz
TWTMC-D Driscoll AT-Cut and SC-Cut crystal oscillator board suitable for frequencies from 5 MHz up to 100 MHz
TWTMC-D&D Daughter board that accommodates two oscillators and provides power supply, dividers, clock delay and switching logic between the two oscillators
TWTMC-OVN Oven board for Driscoll SC-Cut crystal oscillator
TWTMC-DIL DIL adapter for Ian's dual clock board
AT-cut crystal
5.6448 MHz fundamental MOQ 15 pcs Eur 29.00 each
6.1440 MHz fundamental MOQ 15 pcs Eur 29.00 each
11.2896 MHz fundamental MOQ 10 pcs Eur 27.00 each
12.2880 MHz fundamental MOQ 10 pcs Eur 27.00 each
16.9344 MHz fundamental MOQ 10 pcs Eur 27.00 each
22.5792 MHz fundamental MOQ 10 pcs Eur 27.00 each
24.5760 MHz fundamental MOQ 10 pcs Eur 27.00 each
25.0000 MHz fundamental MOQ 10 pcs Eur 27.00 each
45.1584 MHz 3rd overtone MOQ 10 pcs Eur 27.00 each
49.1520 MHz 3rd overtone MOQ 10 pcs Eur 27.00 each
90.3168 MHz 5th overtone MOQ 15 pcs Eur 29.00 each
98.3040 MHz 5th overtone MOQ 15 pcs Eur 29.00 each
SC-cut crystal
5.6448 MHz fundamental MOQ 15 pcs Eur 45.00 each
6.1440 MHz fundamental MOQ 15 pcs Eur 45.00 each
11.2896 MHz 3rd overtone MOQ 15 pcs Eur 38.00 each
22.5792 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
24.5760 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
45.1584 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
49.1520 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
90.3168 MHz 5th overtone MOQ 15 pcs Eur 56.00 each
98.3040 MHz 5th overtone MOQ 15 pcs Eur 56.00 each
Boards
TWTMC-C Colpitts-Clapp oscillator Eur 3.00 each
TWTMC-D Driscoll oscillator Eur 3.00 each
TWTMC-D&D Daughter board Eur 10.00 each
TWTMC-OVN Oven Eur 3.00 each
TWTMC-DIL Dil adapter Eur 2.00 each
Due to the variation of the USD-EUR exchange rate the prices of the TWTMC-C and the TWTMC-D&D have been increased.
Following the list of the available parts and their prices.
Laptech crystals AT-Cut and SC-Cut in HC-43/U cold welded package
TWTMC-C Colpitts-Clapp AT-Cut crystal oscillator board suitable for frequencies from 5 MHz up to 50 MHz
TWTMC-D Driscoll AT-Cut and SC-Cut crystal oscillator board suitable for frequencies from 5 MHz up to 100 MHz
TWTMC-D&D Daughter board that accommodates two oscillators and provides power supply, dividers, clock delay and switching logic between the two oscillators
TWTMC-OVN Oven board for Driscoll SC-Cut crystal oscillator
TWTMC-DIL DIL adapter for Ian's dual clock board
AT-cut crystal
5.6448 MHz fundamental MOQ 15 pcs Eur 29.00 each
6.1440 MHz fundamental MOQ 15 pcs Eur 29.00 each
11.2896 MHz fundamental MOQ 10 pcs Eur 27.00 each
12.2880 MHz fundamental MOQ 10 pcs Eur 27.00 each
16.9344 MHz fundamental MOQ 10 pcs Eur 27.00 each
22.5792 MHz fundamental MOQ 10 pcs Eur 27.00 each
24.5760 MHz fundamental MOQ 10 pcs Eur 27.00 each
25.0000 MHz fundamental MOQ 10 pcs Eur 27.00 each
45.1584 MHz 3rd overtone MOQ 10 pcs Eur 27.00 each
49.1520 MHz 3rd overtone MOQ 10 pcs Eur 27.00 each
90.3168 MHz 5th overtone MOQ 15 pcs Eur 29.00 each
98.3040 MHz 5th overtone MOQ 15 pcs Eur 29.00 each
SC-cut crystal
5.6448 MHz fundamental MOQ 15 pcs Eur 45.00 each
6.1440 MHz fundamental MOQ 15 pcs Eur 45.00 each
11.2896 MHz 3rd overtone MOQ 15 pcs Eur 38.00 each
22.5792 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
24.5760 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
45.1584 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
49.1520 MHz 3rd overtone MOQ 10 pcs Eur 38.00 each
90.3168 MHz 5th overtone MOQ 15 pcs Eur 56.00 each
98.3040 MHz 5th overtone MOQ 15 pcs Eur 56.00 each
Boards
TWTMC-C Colpitts-Clapp oscillator Eur 3.00 each
TWTMC-D Driscoll oscillator Eur 3.00 each
TWTMC-D&D Daughter board Eur 10.00 each
TWTMC-OVN Oven Eur 3.00 each
TWTMC-DIL Dil adapter Eur 2.00 each
Due to the variation of the USD-EUR exchange rate the prices of the TWTMC-C and the TWTMC-D&D have been increased.
Attachments
TWTMC All-in-One
If there will be enough interest, at least 100 boards, I could supply a finished board at a budget price, EUR 60 for a finished All in One board.
The board includes a dual Driscoll oscillator at 22/24 MHz. These are the only frequencies provided. It use a pair of crystals in HC-49/U package instead of HC-43/U. There are two shunt regulators on board to feed both oscillators and squarers. Output is fixed at 3V3. So one needs only unregulated or pre-regulated 10 to 12 VDC.
I could also provide an upgrade to HC-43/U Laptech crystals at the cost of Eur 60.
If there will be enough interest, at least 100 boards, I could supply a finished board at a budget price, EUR 60 for a finished All in One board.
The board includes a dual Driscoll oscillator at 22/24 MHz. These are the only frequencies provided. It use a pair of crystals in HC-49/U package instead of HC-43/U. There are two shunt regulators on board to feed both oscillators and squarers. Output is fixed at 3V3. So one needs only unregulated or pre-regulated 10 to 12 VDC.
I could also provide an upgrade to HC-43/U Laptech crystals at the cost of Eur 60.
Attachments
Available crystals
The following crystals are in stock (exceeding of the previous batches):
- AT-Cut 5.6448 MHz fundamental 3 pcs
- AT-Cut 12.288 MHz fundamental 4 pcs
- AT-Cut 25.000 MHz fundamental 3 pcs
- AT-Cut 33.8688 MHz 3rd overtone 2 pcs
- AT-Cut 45.1584 MHz 3rd overtone 2 pcs
- AT-Cut 49.152 MHz 3rd overtone 2 pcs
- AT-Cut 98.304 MHz 5th overtone 1 pcs
The following crystals are in stock (exceeding of the previous batches):
- AT-Cut 5.6448 MHz fundamental 3 pcs
- AT-Cut 12.288 MHz fundamental 4 pcs
- AT-Cut 25.000 MHz fundamental 3 pcs
- AT-Cut 33.8688 MHz 3rd overtone 2 pcs
- AT-Cut 45.1584 MHz 3rd overtone 2 pcs
- AT-Cut 49.152 MHz 3rd overtone 2 pcs
- AT-Cut 98.304 MHz 5th overtone 1 pcs
When you add yourself to the list please copy and update the previous one.
Crystals and boards interest list
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
Crystals and boards interest list
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
Crystals and boards interest list
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- MadKid: 1 x SC 90.3168 MHz + 1 x SC 98.304 MHz + 5 x TWTMC-D + 5 x TWTMC-OVN
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- MadKid: 1 x SC 90.3168 MHz + 1 x SC 98.304 MHz + 5 x TWTMC-D + 5 x TWTMC-OVN
Crystals and boards interest list
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D
Crystals and boards interest list
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D
- gabor80: 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
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D
- gabor80: 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
Crystals and boards interest list
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D
- gabor80: 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
- xaled: 6 x TWTMC-D + 6 x TWTMC-OVN + 3 x TWTMC-D&D
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D
- gabor80: 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
- xaled: 6 x TWTMC-D + 6 x TWTMC-OVN + 3 x TWTMC-D&D
If you mean the TWTMC All in One, it's a finished and tested board, no assembly needed.
Crystals and boards interest list
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D
- gabor80: 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
- xaled: 6 x TWTMC-D + 6 x TWTMC-OVN + 3 x TWTMC-D&D
- MadKid: 1 x SC 90.3168 MHz + 1 x SC 98.304 MHz + 5 x TWTMC-D + 5 x TWTMC-OVN
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D
- gabor80: 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
- xaled: 6 x TWTMC-D + 6 x TWTMC-OVN + 3 x TWTMC-D&D
- MadKid: 1 x SC 90.3168 MHz + 1 x SC 98.304 MHz + 5 x TWTMC-D + 5 x TWTMC-OVN
Thank,for TWTMC All in One i had understood this is a full board,
but it's for TWTMC -D and TWTMC-OVN for SC-Cut crystal,i dot no have equipement to test proper functioning after the build,i have already the TWTCM-DD,Phil will soon send me
-spm: 90.3168 MHz AT-cut x 1, 98.304 MHz AT-cut, x 1, 90.3168 MHz SC-cut x 1 ,98.304 MHz SC-cut x1 , TWTMC-D x 8, TWTMC-OVN x 4
Crystals and boards interest list
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D
- gabor80: 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
- xaled: 6 x TWTMC-D + 6 x TWTMC-OVN + 3 x TWTMC-D&D
- MadKid: 1 x SC 90.3168 MHz + 1 x SC 98.304 MHz + 5 x TWTMC-D + 5 x TWTMC-OVN
-spm: 90.3168 MHz AT-cut x 1, 98.304 MHz AT-cut, x 1, 90.3168 MHz SC-cut x 1 ,98.304 MHz SC-cut x1 , TWTMC-D x 8, TWTMC-OVN 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
- 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: 2*TWTMC-D, 2*TWTMC-OVN
- martin clark: 1 x AT 5.6448 MHz +1 x AT 11.2896 MHz + 1 x SC 11.2896 MHz + 2 x TWTMC-C + 2 x TWTMC-D
- fralippo: 8 x TWTMC-D + 8 x TWTMC-OVN + 4 x TWTMC-D&D
- gabor80: 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
- xaled: 6 x TWTMC-D + 6 x TWTMC-OVN + 3 x TWTMC-D&D
- MadKid: 1 x SC 90.3168 MHz + 1 x SC 98.304 MHz + 5 x TWTMC-D + 5 x TWTMC-OVN
-spm: 90.3168 MHz AT-cut x 1, 98.304 MHz AT-cut, x 1, 90.3168 MHz SC-cut x 1 ,98.304 MHz SC-cut x1 , TWTMC-D x 8, TWTMC-OVN 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
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