@minivan
98.XXXX MHz XO works for 48,96,192,384 KHz music only. And also it doesn't work for any DSD. It belongs to another sampling rate frequency group.
Regards,
Ian
Great. I suspect your battery/supercap powered ESS system will shine.
BTW... I put your gift of LT3042 pcb's to good use to set 6v & 3.3v. Thanks again. Appreciate the small form factor.
Seems we have a little misunderstanding. I am talking not about SE vs BAL. BAL sounds better for me too. I am talking about paralleling connection. If I understand correctly then the dual mono is when you connect two outputs of the first chip: DACR with DACL to get POSITIVE output (lets call it DACR) and DACRB with DACLB to get NEGATIVE (let it be DACRB) - so you have DACR\DACRB output. And you takes the second chip and do the same to get DACL\DACLB out. The question is how did you connect that DACR with DACL and DACRB with DACLB within each chip? Simple direct connection or through resistors I guess?
If so, then I would like to connect mentioned DACR with DACL or DACRB with DACLB not by simple galvanic connection (direct or through resistors) but by two primary coils of transformer. In this case there will be no galvanic connection and the current summing will be done at the secondary coil of the transformer. That is what I want try
Have checked the board and found direct connections of DACR+DACL and DACRB+DACLB. So there is a way to cut the traces and to check idea
Nice. Waiting to see how it goes.
Interesting to learn that your path to ultimate audio is similar to mine
Please let us know what the effect of the oven will be.
Maybe a good idea to put this information on the thread of Andrea.
The oven takes it up another notch. More of everything. It was like flipping the loudness switch. The bottom and top ends both become much more pronounced, and rest becomes richer. All of this is very preliminary as the power supplies are very rudimentary and nothing is burned in. Interesting side note... I use a real-time audio spectrum analyzer on my phone. The waterfall diagram clearly shows more information below 100hz, and the mid range clearly has sharper definition.
Please try to plug that pulSar in to another XO socket and let me know if you have update. If it still doesn't, please measure the voltage between PIN7 and PIN14 of the XO socket.
Regards,
Ian
Too bad I believed you had one at your work as HF engineer ?
Well, don't see it as a no-go, we can make an announcement and someone near you maybe has an acess to such tools ?
Anyone to help Ian (canadian country fellows) to help us as he already helped us a lot with his front ends ?
Sure some very experienced guys whom helped Andrea Mori have such expensive tools...
Well, don't see it as a no-go, we can make an announcement and someone near you maybe has an acess to such tools ?
Anyone to help Ian (canadian
country fellows) to help us as he already helped us a lot with his front ends ? Sure some very experienced guys whom helped Andrea Mori have such expensive tools...
D
Deleted member 537459
hi ian:
tried 98.x puslar by itself on both xo sockets, still both xo led flashing.
voltage between pin7 and pin14 of both xo sockets measured 3.07v with or withouth 98.x pulsar on.
fifopi fed by lfiopi4 battery , voltage measured on fifopi j5 input terminal is 3.27v.
minivan..
What are the current needs of the Pulsar?
I can't help but wonder if the pulsar requires more current than the LT3042 can deliver.
If it is not getting sufficient power, you could power it separately by pulling the +vcc pin and giving it its own supply. Just a thought.
Edit.. I looked it up. If I am reading the correct datasheet, it looks like it requires 150ma at startup and 50ma continuous. I believe the clocks and the output buffer are both fed by a LT3042 which can output 200ma. So perhaps safe to assume that one clock should work but 2 would have a challenge at startup? Not sure what happens when you are supplying 3.3v. Does the LT3042 step aside and allow enough current to flow?
What are the current needs of the Pulsar?
I can't help but wonder if the pulsar requires more current than the LT3042 can deliver.
If it is not getting sufficient power, you could power it separately by pulling the +vcc pin and giving it its own supply. Just a thought.
Edit.. I looked it up. If I am reading the correct datasheet, it looks like it requires 150ma at startup and 50ma continuous. I believe the clocks and the output buffer are both fed by a LT3042 which can output 200ma. So perhaps safe to assume that one clock should work but 2 would have a challenge at startup? Not sure what happens when you are supplying 3.3v. Does the LT3042 step aside and allow enough current to flow?
Last edited:
Hi wlowes ,I am currently just using the 98.x pulsar by itself onlyas Ian said before you can only use one pulsar on the fifopi one at a time.
The fifopi is fed by the one of the 3.3v output of the ian's lifepo4 board, I read on the fifopi manual, this will bypass the ldo of the fifopi, the a123 battery should have plenty current for the 98.x clock and fifopi?
The fifopi is fed by the one of the 3.3v output of the ian's lifepo4 board, I read on the fifopi manual, this will bypass the ldo of the fifopi, the a123 battery should have plenty current for the 98.x clock and fifopi?