Hi Supersurfer,
That looks really promising. I have the clock KIT and SC cut, just want to try the same. Can you send me the most updated document by email.
Thank you and have a good weekend.
Ian
Hi Andrea,
Is it possible to run the clock on 6.6-6.7v? I want to use Ians battery supply for the clock power. If this is not possible I can use a dropping resistor but I assume direct battery power is better.
A queston for both Ian and Andrea:
The clock is now connected with a 2” ufl cable to the fifopi and the dac master clock input is connected to the fifopi with 2” ufl.
Will it be an improvement to connect the dac master clock input directly to the clock or is there some processing of the clock signal on the fifopi that than will be bypassed?
@Ian: you can find the parts lists and assembly manuals here: https://www.diyaudio.com/forums/dig...itter-crystal-oscillator-151.html#post5073292
Regards,
Is it possible to run the clock on 6.6-6.7v? I want to use Ians battery supply for the clock power. If this is not possible I can use a dropping resistor but I assume direct battery power is better.
A queston for both Ian and Andrea:
The clock is now connected with a 2” ufl cable to the fifopi and the dac master clock input is connected to the fifopi with 2” ufl.
Will it be an improvement to connect the dac master clock input directly to the clock or is there some processing of the clock signal on the fifopi that than will be bypassed?
@Ian: you can find the parts lists and assembly manuals here: https://www.diyaudio.com/forums/dig...itter-crystal-oscillator-151.html#post5073292
Regards,
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You can run the oscillator at 6.6/6.7V without any problem, simply set Q1 collector at half VCC (3.3/3.35V).
About u.fl. cable IMHO you can keep them in place.
Ian, what do you think about?
Andrea
Cables have a specified attenuation based on length. Cable loss specs for RF grade cables with SMA termination are .5 db per meter. Not sure there is a jitter issue so much as a signal strength attenuation. Not cheap... $15 and up.
Hard to believe there is a practical difference between 2" or 2 feet?? Perhaps Andrea can comment?
Hard to believe there is a practical difference between 2" or 2 feet?? Perhaps Andrea can comment?
Are there not too much bigger long groundloops when using long uf-l shielded (grounded on both sides is a better definition) wires and a masterclock output and its I2S outputt in the same time ? What the best option then : masterclock utputt nearer from the streamer for instance or uf-l outputs nearer from the dac chip (so masterclock farer from the streamer MC inputt ?
Difficult to distinguish, the clock is also still running in and I used a battery line that I had paralleled for feeding the iv board in my streamer; so the configuration is now different. There are too much variables to say if battery is better or not.
Maybe I will compare later on when all is settled.
Thanks for the early feedback Supersurfer.
Your pioneering helps those of us following. You have a system that will reveal the fine details.
If I can get 90% of the benefit of the clock using a good linear PS I will be happy.
It will be interesting to see how much benefit there is from feeding clock with a separate PS. People claim its important to avoid contaminating other supplies. Time will tell.
Your pioneering helps those of us following. You have a system that will reveal the fine details.
If I can get 90% of the benefit of the clock using a good linear PS I will be happy.
It will be interesting to see how much benefit there is from feeding clock with a separate PS. People claim its important to avoid contaminating other supplies. Time will tell.
A pleasant surprise was that the latest batch 11.2896MHz SC-cut crystal sounds better than the earlier batch!
And that operating at room temperature in a Colpitts oscillator.
You mean, beeter tha previous sc cut batch or than the at cut at same frequency?
Better than the previous SC cut. The SC cut is always superior to AT cut, even the tiny "tuning fork" type.
It means there is no production consistency from Laptech ?
Or a detail changed in your setup as a passive component on the oscillator like a type or brand of caps for instance or a diiferent smd resistor ??
Is it a hearing feeling or do you check an important difference via your scope?
Agging or break in of the previous sc cut you have ?
Anyway thank you for your inputt
Or a detail changed in your setup as a passive component on the oscillator like a type or brand of caps for instance or a diiferent smd resistor ??
Is it a hearing feeling or do you check an important difference via your scope?
Agging or break in of the previous sc cut you have ?
Anyway thank you for your inputt
B82799S513N1 EPCOS / TDK | Mouser
This common mode choke is no longer available. Next closest thing is B82789C0513H002 EPCOS / TDK | Mouser but with double the impedance. Will it work?
This common mode choke is no longer available. Next closest thing is B82789C0513H002 EPCOS / TDK | Mouser but with double the impedance. Will it work?
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