The Well Tempered Master Clock - Group buy

gabor80 · 2020-11-01 6:35 pm

-G600:
2 x TWTMC-DRIXO New Driscoll semi-finished
1 x SC 5.6448 MHz
1 x SC 6.1440 MHz
2 x TWTMC-DRIXO semi-finished
4 x TWTMC-DBM-F semi-finished
1 x TWTMC-STS-DX
1 x TWTMC-STS-SX
2 x transformer kit for Driscoll 5 to 12
4 x transfomer kit for freq doublers

-mars2:
2 x SC 11.2896 MHz
2 x SC 12.2880 MHz
2 x TWTMC-DRIXO semi-finished
4 x TWTMC-DBM semi-finished
1 x TWTMC-STS-SX
1 x TWTMC-STS-DX
1 x TWRPS-pp bare board

-tbrowne:
4 x SC 5.6448 MHz
1 x SC 6.144 MHz
1 x SC 11.2896 MHz
1 x SC 12.2880 MHz
2 x TWTMC-DRIXO-SF
1 x TWTMC-EXO-SF
4 x TWTMC-DBM-SF
1 x TWTMC-DRIXO-XFMR 22-24 MHz
1 x TWTMC-DRIXO-F 5.6448 MHz
1 x TWTMC-DBM-F 5.6448 MHz to 11.2896 MHz
1 x TWTMC-DBM-F 11.2896 MHz to 22.5792 MHz
2 x TWTMC-STS-SX

-laserscrape:
1 x 5.6448 MHz SC-cut
1 x TWTMC-DRIXO-SF
1 x TWTMC-DRIXO-XFMR 5-12 MHz
1 x TWRPS-UGL-SF

-gabor80:
2 x TWTMC-DRIXO-SF
2 x TWTMC-DBM-SF
2 x TWTMC-STS-SX
2 x TWTMC-DRIXO-XFMR 5-12 MHz
2 x TWTMC-DBM-XFMR

clsidxxl · 2020-11-01 6:45 pm

-G600:
2 x TWTMC-DRIXO New Driscoll semi-finished
1 x SC 5.6448 MHz
1 x SC 6.1440 MHz
2 x TWTMC-DRIXO semi-finished
4 x TWTMC-DBM-F semi-finished
1 x TWTMC-STS-DX
1 x TWTMC-STS-SX
2 x transformer kit for Driscoll 5 to 12
4 x transfomer kit for freq doublers

-mars2:
2 x SC 11.2896 MHz
2 x SC 12.2880 MHz
2 x TWTMC-DRIXO semi-finished
4 x TWTMC-DBM semi-finished
1 x TWTMC-STS-SX
1 x TWTMC-STS-DX
1 x TWRPS-pp bare board

-tbrowne:
4 x SC 5.6448 MHz
1 x SC 6.144 MHz
1 x SC 11.2896 MHz
1 x SC 12.2880 MHz
2 x TWTMC-DRIXO-SF
1 x TWTMC-EXO-SF
4 x TWTMC-DBM-SF
1 x TWTMC-DRIXO-XFMR 22-24 MHz
1 x TWTMC-DRIXO-F 5.6448 MHz
1 x TWTMC-DBM-F 5.6448 MHz to 11.2896 MHz
1 x TWTMC-DBM-F 11.2896 MHz to 22.5792 MHz
2 x TWTMC-STS-SX

-laserscrape:
1 x 5.6448 MHz SC-cut
1 x TWTMC-DRIXO-SF
1 x TWTMC-DRIXO-XFMR 5-12 MHz
1 x TWRPS-UGL-SF

-clsidxxl:
1 x 5.6448 MHz SC-cut
1 x TWTMC-DRIXO-F 5.6448 MHz
1 x TWTMC-DBM-F 5.6448 MHz to 11.2896 MHz
1 x TWTMC-STS-SX
1 x TWRPS-UGL-F

wlowes · 2020-11-01 6:54 pm

laserscrape said:
What do you plan to drive with the FIFO at this clock frequency?

I run everything at redbook speed into a TDA1541a DAC. To my ear it works well and covers natively 99.9% of my collection. Any hires or DSD files that pop up to play convert in real time to redbook PCM. I am happy with the results.

Today I run a WTMC at 45MHz but always run as described, so I am wasting the phase noise performance possible with lower speed crystals. If I have understood Andrea's performance results, the simple 5MHz single Driscoll circuit will give me the best possible performance at least possible cost and complexity.

diyiggy · 2020-11-01 6:57 pm

Same here, I have a cool 24 Mhz AT-cut for the 0.1 % of the 96 or 192 K Hz collection

The red Book will be read on a 5 Mhz SC-Cut !

wlowes · 2020-11-01 7:01 pm

wlowes
1 x 5.6448 MHz SC-cut
1 x TWTMC-DRIXO-SF
1 x TWTMC-DRIXO-XFMR 5-12 MHz
1 x TWTMC-STS-DX

-G600:
2 x TWTMC-DRIXO New Driscoll semi-finished
1 x SC 5.6448 MHz
1 x SC 6.1440 MHz
2 x TWTMC-DRIXO semi-finished
4 x TWTMC-DBM-F semi-finished
1 x TWTMC-STS-DX
1 x TWTMC-STS-SX
2 x transformer kit for Driscoll 5 to 12
4 x transfomer kit for freq doublers

-mars2:
2 x SC 11.2896 MHz
2 x SC 12.2880 MHz
2 x TWTMC-DRIXO semi-finished
4 x TWTMC-DBM semi-finished
1 x TWTMC-STS-SX
1 x TWTMC-STS-DX
1 x TWRPS-pp bare board

-tbrowne:
4 x SC 5.6448 MHz
1 x SC 6.144 MHz
1 x SC 11.2896 MHz
1 x SC 12.2880 MHz
2 x TWTMC-DRIXO-SF
1 x TWTMC-EXO-SF
4 x TWTMC-DBM-SF
1 x TWTMC-DRIXO-XFMR 22-24 MHz
1 x TWTMC-DRIXO-F 5.6448 MHz
1 x TWTMC-DBM-F 5.6448 MHz to 11.2896 MHz
1 x TWTMC-DBM-F 11.2896 MHz to 22.5792 MHz
2 x TWTMC-STS-SX

-laserscrape:
1 x 5.6448 MHz SC-cut
1 x TWTMC-DRIXO-SF
1 x TWTMC-DRIXO-XFMR 5-12 MHz
1 x TWRPS-UGL-SF

-clsidxxl:
1 x 5.6448 MHz SC-cut
1 x TWTMC-DRIXO-F 5.6448 MHz
1 x TWTMC-DBM-F 5.6448 MHz to 11.2896 MHz
1 x TWTMC-STS-SX
1 x TWRPS-UGL-F

lasercut · 2020-11-01 7:39 pm

wlowes said:
I run everything at redbook speed into a TDA1541a DAC. To my ear it works well and covers natively 99.9% of my collection. Any hires or DSD files that pop up to play convert in real time to redbook PCM. I am happy with the results.

Today I run a WTMC at 45MHz but always run as described, so I am wasting the phase noise performance possible with lower speed crystals. If I have understood Andrea's performance results, the simple 5MHz single Driscoll circuit will give me the best possible performance at least possible cost and complexity.

Thanks,
With ian/andrea's FIFO a 5.6Mhz clock should work with 16bit+ Multibit DACs but unless I'm mistaken 11Mhz minimum will be needed to drive MCLK for AK44xx DS DACs at redbook.
Just wanted to confirm you werent using an Ak44xx DAC and I wasnt misinformed.

palmito · 2020-11-01 7:53 pm

Question about boards

Hi Andrea. Great job as always.

Just a quick PCB layout question: are all SMD components on the boards on one side only? Or some (all) boards have SMD components on both sides (top and bottom)?

Thanks.

Supersurfer · 2020-11-01 7:59 pm

Hi Andrea,

If I wanted to go for the battery supply. What would I need for the use of 2pieces 5/6mhz clocks and 4 doublers?
what voltages are needed? can I parallel 2 clocks on one supply rail or wil this deteriorate the performance?
I already own 2 of Ians battery boards, can they also be used?

andrea_mori · 2020-11-01 8:05 pm

palmito said:
Hi Andrea. Great job as always.

Just a quick PCB layout question: are all SMD components on the boards on one side only? Or some (all) boards have SMD components on both sides (top and bottom)?

Thanks.

All SMD components are at the top side of the boards.

Only the LiFePo4 battery power supply boards (TWRPS-LBS-M and TWRPS-LBS-D) have SMD parts at bottom side.

andrea_mori · 2020-11-01 8:12 pm

Supersurfer said:
Hi Andrea,

If I wanted to go for the battery supply. What would I need for the use of 2pieces 5/6mhz clocks and 4 doublers?
what voltages are needed? can I parallel 2 clocks on one supply rail or wil this deteriorate the performance?
I already own 2 of Ians battery boards, can they also be used?

With the TWRPS-LBS-M LiFePo4 battery board you can supply all the devices (2 oscillators + 4 doublers) and also our new FIFO Lite and DAC Lite if you was interested on them in the future. You also need the TWRPS-LBS-P board to recharge the batteries.

To supply 2 oscillators and 4 frequency doublers you need 12 to 18 Vdc (better in the range 15-16 Vdc) and around 240 mA.
I don't know if you can use Ian's stuff because I don't know about the available rails.

Supersurfer · 2020-11-01 8:17 pm

Ian's battery board has 2 rails of 3,3v and 2 rails configurable with 1 to 4 batteries so maximum 13,2V.

With the 2 battery boards I hope there will be enough configuration space for your clock units. What do you think?

Blitz · 2020-11-01 8:21 pm

Sorry to ask this question, I used the search function, but could not find the answer...so:

What is the pirppse of the transformer kits ? Are they needed in any case ?

gabor80 · 2020-11-01 10:00 pm

In the end my interests has lost, so update it:

wlowes
1 x 5.6448 MHz SC-cut
1 x TWTMC-DRIXO-SF
1 x TWTMC-DRIXO-XFMR 5-12 MHz
1 x TWTMC-STS-DX

-G600:
2 x TWTMC-DRIXO New Driscoll semi-finished
1 x SC 5.6448 MHz
1 x SC 6.1440 MHz
2 x TWTMC-DRIXO semi-finished
4 x TWTMC-DBM-F semi-finished
1 x TWTMC-STS-DX
1 x TWTMC-STS-SX
2 x transformer kit for Driscoll 5 to 12
4 x transfomer kit for freq doublers

-mars2:
2 x SC 11.2896 MHz
2 x SC 12.2880 MHz
2 x TWTMC-DRIXO semi-finished
4 x TWTMC-DBM semi-finished
1 x TWTMC-STS-SX
1 x TWTMC-STS-DX
1 x TWRPS-pp bare board

-tbrowne:
4 x SC 5.6448 MHz
1 x SC 6.144 MHz
1 x SC 11.2896 MHz
1 x SC 12.2880 MHz
2 x TWTMC-DRIXO-SF
1 x TWTMC-EXO-SF
4 x TWTMC-DBM-SF
1 x TWTMC-DRIXO-XFMR 22-24 MHz
1 x TWTMC-DRIXO-F 5.6448 MHz
1 x TWTMC-DBM-F 5.6448 MHz to 11.2896 MHz
1 x TWTMC-DBM-F 11.2896 MHz to 22.5792 MHz
2 x TWTMC-STS-SX

-laserscrape:
1 x 5.6448 MHz SC-cut
1 x TWTMC-DRIXO-SF
1 x TWTMC-DRIXO-XFMR 5-12 MHz
1 x TWRPS-UGL-SF

-clsidxxl:
1 x 5.6448 MHz SC-cut
1 x TWTMC-DRIXO-F 5.6448 MHz
1 x TWTMC-DBM-F 5.6448 MHz to 11.2896 MHz
1 x TWTMC-STS-SX
1 x TWRPS-UGL-F

-gabor80:
2 x TWTMC-DRIXO-SF
2 x TWTMC-DBM-SF
2 x TWTMC-STS-SX
2 x TWTMC-DRIXO-XFMR 5-12 MHz
2 x TWTMC-DBM-XFMR

andrea_mori · 2020-11-01 10:07 pm

Supersurfer said:
Ian's battery board has 2 rails of 3,3v and 2 rails configurable with 1 to 4 batteries so maximum 13,2V.

With the 2 battery boards I hope there will be enough configuration space for your clock units. What do you think?

With 13V2 they will work correctly.

andrea_mori · 2020-11-01 10:09 pm

Blitz said:
Sorry to ask this question, I used the search function, but could not find the answer...so:

What is the pirppse of the transformer kits ? Are they needed in any case ?

You need the RF transformers kit only if you get semi-finished boards (oscillators and frequency doublers), while the finished boards have already the transformers installed.

WTS · 2020-11-02 4:21 pm

Andrea, what is the purpose of the RF transformer.
Is this a part from Mouser or a custom part? Is there a different one for 16.9344MHz as I only see 5-12MHz and 22-24MHz?
Thanks

andrea_mori · 2020-11-02 4:37 pm

Without knowing the specs of the crystal I cannot say what component values have to be changed including the RF transformers.

pinnocchio · 2020-11-02 5:43 pm

Hi Andrea,

I'll be buying for your future to be released R2R DAC (either the lite or the bigger one). So I'll be ordering :

1x TWRPS-LBS-P
1x TWRPS-LBS-M-SF
1x TWRPS-LBS-D-SF

Which crystal would be best to get for it and which other product would I need?

Thanks
Do

andrea_mori · 2020-11-02 6:15 pm

Just a quick guide for the GB.

I'm publishing here the documents because I cannot add attachments to the first post.

Please, let me know if I forgot something so I can update the documents.

TNT · 2020-11-02 6:21 pm

Great documentation - thanks!!

//

The Well Tempered Master Clock - Group buy

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