ahh, but you mentioned some circuitry first, not me... and I just know that in lion and lipo not always hugely higher power, but somewhat higher, they have to have these limiters BY LAW to sell them. small batteries if lipo still have easily enough explosive power to do serious damage, but I was indeed thinking of higher power batteries than phone, some are still quite small.
but it really doesnt matter a great deal, even without them, as I mentioned lipo are actually quite noisy and a 3.7v battery, will not be a 3.7v battery, it will charge to 4.2v 3.7v is a nominal voltage, silly voltages for digital when you can buy 3.3v batteries that charge to 3.6
but it really doesnt matter a great deal, even without them, as I mentioned lipo are actually quite noisy and a 3.7v battery, will not be a 3.7v battery, it will charge to 4.2v 3.7v is a nominal voltage, silly voltages for digital when you can buy 3.3v batteries that charge to 3.6
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polyswitches, your battery, even for internal use, must have one along with an external circuit in the device relies on the device still being functional to stop the battery having thermal runaway. the below is from polk audio on removing polyswitches in their speakers, so added to the higher levels of lipo noise already, you have this
from the battery university and mind you even more regulations have been enacted since they updated these pages...
Making Lithium-ion Safe
since then they will also include a low voltage cutoff in the pack, but this can also be in the phone
or it may have a solid state switch, which would again not be designed for low noise.While the attenuation properties of the polyswitch are relatively insignificant, the noise characteristics of the devices are considerable and audible...even when they are brand new. After a polyswitch is tripped the first time, the resistance increases from 52% to 83%. The noise from the "burned" polyswitches also greatly increases. [Quantifying the signal damage done by new and tripped polyswitches would be a good project for an interested meter pontiff.]Removing the polyswitches removes a tiny bit of attenuation, but removes a significant amount of noise. When noise is lowered, the signal becomes apparently louder although the amplitude (level) of the signal remains the same. It is analogous to cleaning a dirty window.
from the battery university and mind you even more regulations have been enacted since they updated these pages...
Making Lithium-ion Safe
since then they will also include a low voltage cutoff in the pack, but this can also be in the phone
Yes, I did mentioned about some circuitry inside battery. I was not very sure at that moment. Now I`m a little bit more sure about...
I agree that in this case of using battery to power clock oscillators it may be improvements, and one may research a little bit more to find the best way.
Something is very sure (for me who have done this experiment): using the phone battery so how it is, the improvement is obviously.
To be honest, I have to say that may first plan were to connect that battery before the low noise regulator. But suddenly I decided to eliminate the regulator completely, and use only the battery. The phone battery I had, was perfect for this project (it fits very well inside). So, I just done it like this. In my opinion the improvement were huge at once. After this I had not so much time to research more about, but listen my records from this improved player now is just delightful... and it take quite much time...
I did not recharged my batteries so far. One may test how is the tension level just after recharge. If will be necessary a regulator, I will not be very happy. But is a way to go, I think... One may take anyway a closer look in this field... I think to do it so afterwords.
I agree that in this case of using battery to power clock oscillators it may be improvements, and one may research a little bit more to find the best way.
Something is very sure (for me who have done this experiment): using the phone battery so how it is, the improvement is obviously.
To be honest, I have to say that may first plan were to connect that battery before the low noise regulator. But suddenly I decided to eliminate the regulator completely, and use only the battery. The phone battery I had, was perfect for this project (it fits very well inside). So, I just done it like this. In my opinion the improvement were huge at once. After this I had not so much time to research more about, but listen my records from this improved player now is just delightful... and it take quite much time...
I did not recharged my batteries so far. One may test how is the tension level just after recharge. If will be necessary a regulator, I will not be very happy. But is a way to go, I think... One may take anyway a closer look in this field... I think to do it so afterwords.
That figure is followed by a:
4. BW = 12 KHz to 20 MHz.
Most music is under 12khz... but -80 dbc/hz at fs+10 hz is not bad...
/
I bought this (25Mhz) one here, and is oscillating very well in my player :
Crystals and Oscillators | Oscillators | DigiKey
If you think is not good for you, you may chose another one... This one is anyway much, much better than that original one....
:Crystals and Oscillators | Oscillators | DigiKey
If you think is not good for you, you may chose another one... This one is anyway much, much better than that original one....
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By the way, this infos here is for those who has no clue about this BDP95 player:
The 25Mhz oscillator is meant to clock the main processor in the machine. From this processor it not may come out any "music"... but I2S digital lines which are decoded in the DAC... From that DAC it come the music out.... The DAC have its own oscillator... Quite complicated process!
The 25Mhz oscillator is meant to clock the main processor in the machine. From this processor it not may come out any "music"... but I2S digital lines which are decoded in the DAC... From that DAC it come the music out.... The DAC have its own oscillator... Quite complicated process!
I bought this (25Mhz) one here, and is oscillating very well in my player
Crystals and Oscillators | Oscillators | DigiKey
If you think is not good for you, you may chose another one... This one is anyway much, much better than that original one....
Thanks Coris
Just trying to make bigger order as expensive postage with small order
Will get 27MHz for DVD player as well.
Was looking into possible improvements in the Hd Dvd player but cannot get a schematic.The only crystal I can find that is familiar is a 24.576MHz which I think is audio associated.The rest resembles a motherboard.
Smiffy
Hello Coris,
I have a problem on my OPPO93 and I need help.
I instaled the map of OCXO Jaehong Lee.
25.000MHz clock change turns 1h ok
20.000MHz clock change turns 1h ok
Change the clock 27.000MHZ OPPO is ALUME but no display.
It cuts the power, connection vérilerles different water and touching the ground between the motherboard and the card NuForce analog smoke came out of the motherboard at the water supply between the supply line and the map mother.
A protection component of a drop.
For the OPPO does ALUME more since even changing the power supply board.
Would you have any idea what component could have let go?
Sincerely Johann.
I have a problem on my OPPO93 and I need help.
I instaled the map of OCXO Jaehong Lee.
25.000MHz clock change turns 1h ok
20.000MHz clock change turns 1h ok
Change the clock 27.000MHZ OPPO is ALUME but no display.
It cuts the power, connection vérilerles different water and touching the ground between the motherboard and the card NuForce analog smoke came out of the motherboard at the water supply between the supply line and the map mother.
A protection component of a drop.
For the OPPO does ALUME more since even changing the power supply board.
Would you have any idea what component could have let go?
Sincerely Johann.
I never use opamps and I only use what is good about the '95 - and I have heard nothing that touches it, IF you get everything right.
I pull the outputs of the ES9108 to ground, that exchanges the voltage offset to 8.5mA current offset. The current is dumped into a few Ohm to ground and using a Diamond Transistor circuit based on the JLTi Phono Stage, but sans the RIAA EQ, up to 2,25V RMS - exactly the same as before.
No negative feeedback, DC coupled (no caps in the signal path), massive bandwidth and huge headroom at VHF - a must for an I/V converter - totally immune to slew rate induced distortion, which people like Charlie Hansen (Ayre) says causes digital sound - a kind of greyness and lack of tonal colours - and that only when it's not to bad and unlistenable when worse.
For powering the clocks I use the Terra Firma - a power supply that is tuned down to below 5 millionth of a Hertz... Batteries? They are not even close.
The Oppo 95 is totally transformed.
I know the rep for the company that brings in the Oppo down here, and they sell MUCH more expensive gear - he has heard it and quite astonished: "Some people will always buy expensive gear, but if the are into sound they should get one a '95 and take it to you."
It is that sublimely good.
Cheers, Joe R.
That's not fair. What I have done for the DIY fraternity has been widely acknowledged - and it was a direct response to Coris re the quality of the Oppo 95, because I disagreed. And even stock I am on record saying the Oppo 95 is amazing quality and even if upgrading or DIY is not your thing, buy it anyway if it fits your budget.
Besides, I don't make a lot of money and I don't use forums - I let others speak. Note my near absence from Australian Stereonet. Even then when I ever so occasionaly get an email asking me to respond, and I do - it happens again - is this an Australian thing? Weird.
I stand by my record - it's a good one!
Cheers, Joe R.
The main clock in the 93/95 is the 27 meg clock underneath the board. The 25 meg clock is for the laser OPU. Yes, it makes the sound better to change the 25 meg clock but I bet it would make more difference to change them both. This information comes directly from Jason at Oppo.
The 103/5 use a new Mediatek chip that has no separate laser OPU clock. The only clock on the Mediatek chip is a 27 meg located on the top of the board. You cannot see the clock without removing the heatsink on the Mediatek. Again, this information comes directly from Jason at Oppo.
Joe,
Yes, you do share some good stuff. Thank you. However, you do try to tease us with your products.....ie...advertise. I want your circuit for a low noise, low frequency power supply for the clocks. Will you share it with us? Or are you going to keep teasing. If you are not making a lot of money on it then you might as well share with the world. I mean, how many of your customers would roll their own?
The 103/5 use a new Mediatek chip that has no separate laser OPU clock. The only clock on the Mediatek chip is a 27 meg located on the top of the board. You cannot see the clock without removing the heatsink on the Mediatek. Again, this information comes directly from Jason at Oppo.
Joe,
Yes, you do share some good stuff. Thank you. However, you do try to tease us with your products.....ie...advertise. I want your circuit for a low noise, low frequency power supply for the clocks. Will you share it with us? Or are you going to keep teasing. If you are not making a lot of money on it then you might as well share with the world. I mean, how many of your customers would roll their own?
Good grief.
And should I betray commercial confidences? No way. Get real. Some people's idea of teasing strikes me as rather odd. We are all individuals - and from where I am, teasing is not really my thing - don't have a need to do it.
When Menno Vanderveen was asked (by us - and SY was there) what magnetic materials he used in his transformers, he simply said that there were some things he had to keep to himself for reasons that were obvious. Does that amount to teasing? Does that now mean that ALL the things he has openly shared with us are now relegated as worthless because he chose to make certain decisions, some of which (as in my case) would maybe betray confidences placed in me by others and... well, I just don't get it. And quite frankly don't care. Besides, I would then be open to worse charges because I was being indiscreet?
As I said - I'm not perfect, but I stand by my record. It's not a bad one - and the idea that money makes the world go round and the Messianic "Free Market" is going to save us all... that is thankfully not the world I surround myself with. Maybe I am a latent hippie who believe that love is more important than money.
My Elsinore Loudspeaker Project has taken thousands of hours and a free gift to the DIY Fraternity. There was no money in it - and it was never done for the money. Made a lot of friends though.
And I am not going to be bowed into silence and have my right to speak freely and too bad if some take it the wrong way. Not my problem any longer.
BTW, do you see me constantly on the forums and spending a lot of time on them? Nope? Advertising? Sheesh... I could really rather maximise it and I am not...why? Because I am not a very good businessman I'm afraid.
Maybe I should just not bother with forums anymore...? Is that the idea? Word of mouth has been OK. Here is Oz they discuss my stuff on the local Stereonet Forums and I'm hardly ever on Stereonet. If I was to advertise, then THAT is where I would do it, not here.
Ciao, Joe R.
PS: One rather amusing incidence was Esa Marilainen getting criticised for spruiking his "Current Driving of Loudspeakers" book on a diyaudio.com forum. How did he dare as it was a commercial product/book? What was funny was he had every right, as it was the Vendor Forum - but somebody STILL couldn't help himself.... sigh. Funny though.
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Thanks, that is good info. We won't be seeing any Oppo 105s here until Jan/Feb - not that much interested in the 103 comparatively speaking.
Now that 105 pics have been released, I believe that I can spot the 50-100MHz(?) for the ES9018 as X1 - its near the ribbon going to the 7.1 board - so the other ES9018 would be getting the shared clock signal via that ribbon I suspect.
Have you tried a SAW oscillator here? Best if you do a dedicated PS for it and fully floating (its own tx etc). Maybe a servo tuned to a ridiculously low frequency is not a bad idea, one that takes days to settle at 3.3V - and a happy wait...
Oops! Teasing...? Sorry. But I am sure that if others wanted to do it, they would.
The lowest SAW I can find is 50MHz, so there really is only one DAC that SAWs are compatible with.
Please try it, I would love your thoughts on it.
It seems that the stereo DAC is no longer 4x parallelled per channel? That Oppo has split them up into 2x pairs and using one 2x for headphone amp - it's own I/V etc. Disable that and I will disable run links that gets back the earlier 4x configuration and then use own post-DAC solution as before.
Is Oppo claiming that 2x is as good as 4x? Or is this simply about adding a feature. Some will definitely take this as a backwards step and leave headphone amps for specialist headphone amps.
You guys in the States would now have physical samples. Wouldn't it be great if Oppo just made info available, rather than just a "Jason" dripping info?
Cheers, Joe
The DAC in the 105 is run thuswise (is this really a word?): a pair of outputs for the headphone, a pair of outputs for unbalanced outs, a pair of outputs for the left balanced outs and a pair of outputs for the right balanced outs. Anotherwords....each DAC pair is used separately.....no paralleling whatsoever. Burson is using the ESS DAC chip in their latest DAC and they said they listened and paralleling actually sounded worse than single....so they are using it single. Also the Eastern Electric DAC (excellent sound, especially with Dexa or Burson Op amps) is using the DAC with just one set of outputs. I think Oppo said somewhere they felt there was no sonic penalty from doing it this way. So, there you have it. You can, of course, wire it any way you want.
Oppo gives plenty of info. There was an interview on Audioholics that explained a lot. Please read it. No manufacturer goes into much details of their circuitry. Only us modders and tweakers want to know the inner details (I mean this is a $1200 universal player....how much info do they need to tell us? This is not some super expensive exotic machine with Teflon caps, tweaky clocks and tubes and stuff....and even the companies that make such things don't tell us much). The information about the clocks came because I asked about the clock on the 105 because I could not decifer what frequency it was. I asked if it was a 25 meg master clock, just as they had used on the 93/5 and that is when he told me I had it wrong. Of course, I was just rehashing what I thought was the correct info that I had "learned" here. If you really want to know how something works on the Oppo......contact Jason at Oppo. He is very helpful. This is what I will do from now on. We all assumed the original info that you posted was correct.....you know, the secret conspiracy about the fabled 25 meg clock......oh what drama we weave....he he.
The 105 is a very nice machine. I am sure someone will start a thread on it soon.
Oppo gives plenty of info. There was an interview on Audioholics that explained a lot. Please read it. No manufacturer goes into much details of their circuitry. Only us modders and tweakers want to know the inner details (I mean this is a $1200 universal player....how much info do they need to tell us? This is not some super expensive exotic machine with Teflon caps, tweaky clocks and tubes and stuff....and even the companies that make such things don't tell us much). The information about the clocks came because I asked about the clock on the 105 because I could not decifer what frequency it was. I asked if it was a 25 meg master clock, just as they had used on the 93/5 and that is when he told me I had it wrong. Of course, I was just rehashing what I thought was the correct info that I had "learned" here. If you really want to know how something works on the Oppo......contact Jason at Oppo. He is very helpful. This is what I will do from now on. We all assumed the original info that you posted was correct.....you know, the secret conspiracy about the fabled 25 meg clock......oh what drama we weave....he he.
The 105 is a very nice machine. I am sure someone will start a thread on it soon.
Good stuff - thanks. I will look up those things. No doubt you will be doing your thing as well, so will keep an eye on that too - not with any evil intentions of course. My post-DAC solution can certainly work of single pairs, and multiples, so indeed will be worth trying paralleling up and listen - but in reality then, the L & R in the 7.1 Board would be identical to Stereo Board (except for the additional balanced line driver).
Also, as far as available real estate, I have only see the top down photo - but it has to be better. You have seen the actual player? If so, is there a plus there? It looks like it will be a lot easier to work on - that split of boards.
Cheers, Joe
Also, as far as available real estate, I have only see the top down photo - but it has to be better. You have seen the actual player? If so, is there a plus there? It looks like it will be a lot easier to work on - that split of boards.
Cheers, Joe
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I realise I had read the Audioholics article before.
I still wish that they would do what most manufacturers do, like the Japanese brands etc, actually give us a manual. Yet it doesn't stop us...
But yes, Jason seems to be the goto man.
BTW, I was not the first to identify the 25MHz - there were two others and one of them was Audiocom. But that single 27MHz is good news.
Will you start the BDP-105 thread - especially if you actually have a sample that we down here has to wait for.
Cheers, Joe R.
I still wish that they would do what most manufacturers do, like the Japanese brands etc, actually give us a manual. Yet it doesn't stop us...
But yes, Jason seems to be the goto man.
BTW, I was not the first to identify the 25MHz - there were two others and one of them was Audiocom. But that single 27MHz is good news.
Will you start the BDP-105 thread - especially if you actually have a sample that we down here has to wait for.
Cheers, Joe R.
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Go back to Post #2 http://www.diyaudio.com/forums/digital-source/190033-upgrading-modding-new-oppos-bdp-93-bdp-95-a.html#post2607333
This was installed by a French audiophile on an Oppo 93 - he ordered and Audiocom Clock as shown and they sent him 25MHz and instructions to install.
I then contacted Audiocom and asked the pertinent question re 25MHz vs 27MHz - and they played silly-buggers with me and just said I should order the Clock and specify the Brand and Model Number and they would send me the correct kit and instructions. They could have of course just told me to click "27MHz" in their online shop - so why was ordering for Oppo 93 different? The fact they had sent that kit already to another customer shows what they would have sent me if I went ahead with the order as per their instructions. I also wonder if this is still the kit they send now to Oppo 93 owners/users?
The "French" kit and shows 25MHz input - their photo:
Of course we are not talking about the Oppo 95 - but only the Oppo 93 as that does not use a 2nd clock as per 95 - so you must clock in the Digital Board. I assume that IF Audiocom sends a clock kit for the Oppo 95, that only does the Sabre DAC(s) and doesn't bother with any clock on the Digital Board.
So there you are. Led up the garden path? Also, how does it explain/tally up, with what we hear with file playback on the Oppo 95?
Cheers, Joe R.
This was installed by a French audiophile on an Oppo 93 - he ordered and Audiocom Clock as shown and they sent him 25MHz and instructions to install.
I then contacted Audiocom and asked the pertinent question re 25MHz vs 27MHz - and they played silly-buggers with me and just said I should order the Clock and specify the Brand and Model Number and they would send me the correct kit and instructions. They could have of course just told me to click "27MHz" in their online shop - so why was ordering for Oppo 93 different? The fact they had sent that kit already to another customer shows what they would have sent me if I went ahead with the order as per their instructions. I also wonder if this is still the kit they send now to Oppo 93 owners/users?
The "French" kit and shows 25MHz input - their photo:
Of course we are not talking about the Oppo 95 - but only the Oppo 93 as that does not use a 2nd clock as per 95 - so you must clock in the Digital Board. I assume that IF Audiocom sends a clock kit for the Oppo 95, that only does the Sabre DAC(s) and doesn't bother with any clock on the Digital Board.
So there you are. Led up the garden path? Also, how does it explain/tally up, with what we hear with file playback on the Oppo 95?
Cheers, Joe R.
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