The 'best' performing clock?

[Baka]

Originally posted by carlosfm
Yes, but a good dedicated unregulated PSU is needed.

I would like to build a dedicated unregulated PSU for my HagClock.
As I could understand it should consist of small trafo + diodes + smoothing capacitors.

Could you give me additional advise on this?

Anyone also, please...

Thanks,
Baka

 

[Elso Kwak]

I would like to build a dedicated unregulated PSU for my HagClock.
As I could understand it should consist of small trafo + diodes + smoothing capacitors.

Could you give me additional advise on this?

Anyone also, please...

Thanks,
Baka

Don't.
Use the raw digital supply of your player.
Replace LT1016 by AD8561 and the FET by J309.

You have almost, but not entirely, a KWAK-CLOCK then.

 

[fmak]

Hi Fred,

Elso never carries out measurements, so it doesn't make sense to discuss technical issues with him.

I agree on your remarks, but do not understand your note on the ground problems, could you eleborate ?

best

I tried the newish LT (?) low noise SMD series. All need a largish ground plane to avoid 50 Hz pickup. Don,t know why. My setup is short point to point. Try that with the small SMDs!

 

[fmak]

Really?

Really really really

 

[Baka]

Originally posted by Elso

Use the raw digital supply of your player.

Many thanks, Elso.

HagClock needs both positive and negative supply, from +/-8V to +/-15V and, regarding the raw digital supply, I have only +8V...

What is your advise for this situation, please? To build unregulated PSU or not ?

Rplace LT1016 by AD8561 and the FET by J309

I have installed AD8561 at the very beginning. At a later time I have aditionally soldered 20pF capacitors on the +- supply rails, as recomended by the manufacturer, and I could hear the further improvement.
Will try to replace JFET2N5486 with J309.

You have almost, but not entirely, a KWAK-CLOCK then.

Well, the only reason why I haven't implemented a KWAK-CLOCK was pcb.

Many thanks again, Elso

Baka

 

[Elso Kwak]

Hi Baka,
Use it single supply I would say. Omit the negative regulator. Ground pin 4 of the comparator.

 

[Guido Tent]

Wave shapes are totally unimportant!
The best comparators and regulators are SMD.................
Agree on Oscons.
I like PCBs slighty smaller than the size of a credit card.......

then why do you stick a comparator in your design ? if shapes do not count, you'd better stick with a sine wave.

 

[fmak]

then why do you stick a comparator in your design ? if shapes do not count, you'd better stick with a sine wave.

Guido

Some say that a sine wave is best; what is your view?

Fred

 

[Guido Tent]

Guido

Some say that a sine wave is best; what is your view?

Fred

Hi Fred

For clock distribution it isn't, a square wave does a better job as its' higher slope is less sensitive to induced noise. To make a square, you need a device with lots of gain, which induces a bit of jitter.

As always in life, trade-offs need to be made......

best

 

[Baka]

Originally posted by Elso Kwak
Use it single supply I would say. Omit the negative regulator. Ground pin 4 of the comparator.

I will try soon.

Thanks, Elso.

Baka

 

[Elso Kwak]

No Comment

.....then why do you stick a comparator in your design ? if shapes do not count, you'd better stick with a sine wave.

Guido,
So I do take gladly your advice: no comment!