Can someone send to me the Elso's latest clock schematics (version6)? :)

[kenev]

Guido,

As I said in the above message, I 'm not a digital electronics expert. Unfortunately, I cannot explain the subject, it's just a guess. Maybe, Elso, who has designed the clock, could explain it further.

 

[Franz G]

Imho, the AD8561 comparator is responsible for a good output signal of the Kwak clock.

And the AD8561 is single supply as stated in the datasheet.

Franz

 

[Josipo]

problem

I'm not certain how to design the ferrite beads, L4 and L3 (2.2 mH) in Kwak 7. Could someone explain to me how is it done or send me a picture of the latest Kwak Clock?

Thanks

 

[Jocko Homo]

Elso is not a "digital design expert", either. But I suspect if you were to ask him to explain, his response would probably be something like:

"Because it sounded better to me if I.........blah, blah............" etc.


Jocko

 

[Guido Tent]

Guido,

As I said in the above message, I 'm not a digital electronics expert. Unfortunately, I cannot explain the subject, it's just a guess. Maybe, Elso, who has designed the clock, could explain it further.

Hi

besides from extremes, it is not the clock, but the receiving end (DAC) which could bennefit from symmetry. However, most, if not all DACs convert at either the positive or negative slope.

 

[Elso Kwak]

Elso is not a "digital design expert", either. But I suspect if you were to ask him to explain, his response would probably be something like:

"Because it sounded better to me if I.........blah, blah............" etc.


Jocko

Blah, blah blah.........???????
Is that all you have to say?

I better go back to Greece!

 

[Jocko Homo]

OK, so now you are back.......

Blah, blah, blah, and more blah.

Happy now? You are supposed to be.

Jocko

 

[hatyri]

I'm little disappointed..

I do that Elso's clock and my frend test that and compare with PLL1708 chip. (He workin Nokia and can uses that kind of instrument what need for measure.)

Maybe my clock have something wrong or PLL1708 is better for low jitter solutions. All else is ok but too much jitter. PLL1708 give about 42-55pS and my Elso's give 200-300pS. What is approximately what I get also CS8416.
My makeshift is that PLL1708 and looks like now I use that..

But have any one else compare these?

(I don't have more accurate result but I trust my frend who do high frequency measurements every day.)

Yes.. I use good quality components..

 

[peranders]

I have never seen Elso mentioning any data of his clock so if the ocsillator is equally good/bad as a plain reciever IC it's still not false marketing. The main thing is that the oscillator "sounds" better, regardless of numbers.

A more developed pcb would most likely improve things.

Maybe Elso should get some help from the real digital expert around here, Mr. H?

 

[Jocko Homo]

Mr. H????

Well, I think that I know what Elso will say. Probably will sound a lot like "blah, blah, blah".

Never knew that Elso did any marketing.

Unlike someone else that I know...........he adds in sarcasm.

Jocko, not a digital designer or a marketing weenie.

 

[Elso Kwak]

I'm little disappointed..

I do that Elso's clock and my frend test that and compare with PLL1708 chip. (He workin Nokia and can uses that kind of instrument what need for measure.)

Maybe my clock have something wrong or PLL1708 is better for low jitter solutions. All else is ok but too much jitter. PLL1708 give about 42-55pS and my Elso's give 200-300pS. What is approximately what I get also CS8416.
My makeshift is that PLL1708 and looks like now I use that..

But have any one else compare these?

(I don't have more accurate result but I trust my frend who do high frequency measurements every day.)

Yes.. I use good quality components..

Hi Hatyri,
I am afraid there is something wrong with your measurement setup.
Sjerko Piersma tested his version of the KWAK-CLOCK with the U310 instead of J309 and mearured about 8-9ps jitter 3-Sigma.

Now, not that I am worried about measurements regarding the overwhelming positive response on my clock.
Also there is the issue of the jitter spectrum.

 

[Elso Kwak]

Single or dual supply

Imho, the AD8561 comparator is responsible for a good output signal of the Kwak clock.

And the AD8561 is single supply as stated in the datasheet.

Franz

Hi Franz,
The AD8561 can be used on either single or dual supply! Please read the datasheet. Dual supply gave slightly better sonical results.

 

[Franz G]

Hi Elso

Yes, of course: single or dual supply. I was just countering another answer and so wanted to point out the single supply function.

Here is my latest pcb, working very good in a Marantz CD-40.

Kind regards
Franz

 

[peranders]

Franz, your 230 VAC looks not 100% good, it might even be dangerous. The creapage distance is way too small between primary and secondary side. You should strive to have 8 mm creapage.

 

[Franz G]

Ooops, yes, you're absolutely right, PA!

Franz

 

[peranders]

Don't forget that your text is also made of copper so it will also decrease the general creapage.

 

[Franz G]

Here is, how it is implemented actually.

The underside of the board, the high-voltage-part, is covered with epoxy and a thin pertinax sheet.

Franz

 

[peranders]

It's something but I don't think that the real experts would approve this as a safe solution.

 

[Franz G]

BTW:

My next project, a external DAC with tube output, will be based on this Classé 1 enclosure with the original psu (the original dac board has burned out...).

Here, I find primary traces 4 to 5 mm away from the groundplane. And: originally, the middle pin of the IEC connector, the earth, is hanging in the air, not connected at all!

But: still a very nice base to build a own DAC. 10mm alu frontplate and very nice finish at all.

Franz

 

[jean-paul]

And: originally, the middle pin of the IEC connector, the earth, is hanging in the air, not connected at all!

That is called double insulated in Europe, nothing wrong with that. No ground loops and safe if well implemented.