Master Clock Talk

[sajunky]

Ali and his link management never succeeds to work

Maybe because link has information about other user. This one has such information removed:

https://www.aliexpress.com/item/32966029460.html

Opening page shows a cap with pin. You must select "colour: no pin".

 

[OCC7N]

Maybe because link has information about other user. This one has such information removed:

https://www.aliexpress.com/item/32966029460.html

Opening page shows a cap with pin. You must select "colour: no pin".

This helped google search with the number

Well buy one for every unused ports and without the center pin?

 

[OCC7N]

Does not make sense to me putting metal on metal, it actually looks more of an antenna than without

I think I will leave mine open.

 

[gimmeheadroom]

Does not make sense to me putting metal on metal, it actually looks more of an antenna than without

I think I will leave mine open.

Thomann has terminated plugs of the correct impedance. Not that I want to entry this fray, but it seems to me a properly terminated plug of the correct impedance is the best approach (if you can't selectively turn off specific outputs) since it means that all the energy is being consumed by a simulation of a source device as expected.

 

[OCC7N]

Thomann has terminated plugs of the correct impedance. Not that I want to entry this fray, but it seems to me a properly terminated plug of the correct impedance is the best approach (if you can't selectively turn off specific outputs) since it means that all the energy is being consumed by a simulation of a source device as expected.

But its just metal on metal. I dont see the termination point. It only has contact with ground, but leads to nowhere?

 

[gimmeheadroom]

But its just metal on metal. I dont see the termination point. It only has contact with ground, but leads to nowhere?

No, the ones I'm talking about do not short the connection. They are a dummy load of the correct impedance.

https://www.thomann.de/intl/pro_snake_resistor_75_ohms_bnc.htm
https://www.thomann.de/intl/damar_hagen_1_1041_2220_1.htm
https://www.thomann.de/intl/damar_hagen_1_2284_2220_1.htm
https://www.thomann.de/intl/damar_hagen_1_8566_13120_1.htm

etc...

 

[OCC7N]

No, the ones I'm talking about do not short the connection. They are a dummy load of the correct impedance.

https://www.thomann.de/intl/pro_snake_resistor_75_ohms_bnc.htm
https://www.thomann.de/intl/damar_hagen_1_1041_2220_1.htm
https://www.thomann.de/intl/damar_hagen_1_2284_2220_1.htm
https://www.thomann.de/intl/damar_hagen_1_8566_13120_1.htm

etc...

Yeah but no pins are recommended. Pin or to no pin?

 

[gimmeheadroom]

Yeah but no pins are recommended. Pin or to no pin?

Damar and Hagen is a pro audio company https://www.damar-hagen.de/en/produkte/

I said I'm not getting into the pin / no pin / antenna / no antenna debate

This is a classic solution in RF applications- dummy load. It has to have a pin.

 

[OCC7N]

One person had ground issues and it solved the pops and clicks sound.

He used it for the word clock

 

[gimmeheadroom]

One person had ground issues and it solved the pops and clicks sound.

He used it for the word clock

You're welcome

 

[OCC7N]

Yeah thanks, Im not gonna think much more about it. Gonna order 4

 

[sajunky]

This is a classic solution in RF applications- dummy load. It has to have a pin.

Yes, classic application on the end of the transmission line. Some devices do not have internal terminators, there were designed for daisy chain feeding. Some have a secondary connector for a daisy chaining or termination. Then you use these caps with terminating resistor as on the photo.

Dummy load also refer to terminating transmission line - for testing purpose (specific use).

There is no reason to terminate unused outputs. The only exception is where inductive elements are used for tuning up the output waveform and overshots peak voltage on these inductors or internal traces would exceed destructive voltage of drivers. Problem only exists on the RF power line drivers.

 

[roderickvd]

I would be more afraid of a radiation coming out of the pin. But once again, my thinking process is different, again.

It works both ways of course.

Since I seconded the suggestion to use terminating loads instead of just caps, I did not reply as I have little interest to fight pseudo-science or confirmation bias. But for those willing to understand, I will point to this YouTube video:

Problem only exists on the RF power line drivers.

Signals sent down an unterminated path cause standing waves and so, reflections. This is always so, not just in the case of inductive elements tuning anything. The question is not whether it happens, but whether it’s in fact a problem.

One insightful comment is that buffering on the OCK-2 offers isolation (actually: dampening, not infinite isolation as I don’t think the isolation is optocoupled, is it?) so it is questionable if anyone would notice the difference of a termination load over no termination, or just a cap. But looking at how we are in the extreme dBs here comparing an OCK-1 to an OCK-2, I am sure that any audiophile would take every little extra.

Again, for those who want to understand, take a look at the video which shows what’s happening in exaggeration. Not looking for a quarrel with others — do whatever you want and enjoy the music. Peace!

Funny how a simple suggestion could cause such a ruckus

 

[FredA]

It works both ways of course.

Since I seconded the suggestion to use terminating loads instead of just caps, I did not reply as I have little interest to fight pseudo-science or confirmation bias. But for those willing to understand, I will point to this YouTube video:




Signals sent down an unterminated path cause standing waves and so, reflections. This is always so, not just in the case of inductive elements tuning anything. The question is not whether it happens, but whether it’s in fact a problem.

One insightful comment is that buffering on the OCK-2 offers isolation (actually: dampening, not infinite isolation as I don’t think the isolation is optocoupled, is it?) so it is questionable if anyone would notice the difference of a termination load over no termination, or just a cap. But looking at how we are in the extreme dBs here comparing an OCK-1 to an OCK-2, I am sure that any audiophile would take every little extra.

Again, for those who want to understand, take a look at the video which shows what’s happening in exaggeration. Not looking for a quarrel with others — do whatever you want and enjoy the music. Peace!

Funny how a simple suggestion could cause such a ruckus

There is nothing like trying it. I ordered 2 50-ohm and 2 two 75-ohm.

 

[FredA]

@roderickvd Given a short signal path (a few cm) the effect of the standing wave should be much smaller than in the video. In my master-clock, there is 10-15cm, so well worh a try. Or is it the opposite??