Franz G said:
Mostly 20VA 2 x 4.5V EI transformers.
They are a few mH and 2 x0.1 ohms
These are of course saturating with the DC but I understand that this reduces the bass response which does not really concern me.
In a split rail supply I would configure them as shown.
at present I am experimenting with discrete regulators after the choke stage but if they were in the cct I would only connect the grounds together at the PSU O/P
This is the only way I have found of equalling or perhaps bettering batteries
mike
Attachments
why did this give a link instead of showing the picture ?
what is the technique for showing a picture ?
this is an email size photo
what is the technique for showing a picture ?
this is an email size photo
Re:
Most of this thread I have seen people talking about which OP-AMP is the best, and how PS should be designed but would any one like to paste schematics of a high end buffer based on an OP-AMP (should not be haaving tubes, as they are not available here in my country) in this thread for a LAMER like me as I ve got substantial quantities of all those buffer chips as mentioned in the thread including OPAs and NEs, etc , I will appreciate.
Most of this thread I have seen people talking about which OP-AMP is the best, and how PS should be designed but would any one like to paste schematics of a high end buffer based on an OP-AMP (should not be haaving tubes, as they are not available here in my country) in this thread for a LAMER like me as I ve got substantial quantities of all those buffer chips as mentioned in the thread including OPAs and NEs, etc , I will appreciate.
Re: Re: Re: OPA6x7 and Class-A
Ah, but what's the proper definition of accurate? From an engineers standpoint, it's easy. What goes in, comes out unchanged, except for amplititude, power, etc. From the listeners standpoint, it's not so simple. What's most accurate in the processing chain, may not sound most like a live performance. Here's my take:
http://www.diyaudio.com/forums/showthread.php?postid=451797#post451797
You may have a different one.
Sheldon
aHobbit said:
Ah, but what's the proper definition of accurate? From an engineers standpoint, it's easy. What goes in, comes out unchanged, except for amplititude, power, etc. From the listeners standpoint, it's not so simple. What's most accurate in the processing chain, may not sound most like a live performance. Here's my take:
http://www.diyaudio.com/forums/showthread.php?postid=451797#post451797
You may have a different one.
Sheldon
Rule 1:
You never really know what's in the disc.
Accurate reproduction means that you can understand the music, you clearly listen what every performer is playing, all the details are always there.
Your brain doesn't have to work hard to understand the music.
The human brain fills the gaps, that's why you can listen to music on portable radios.
But if you are trying to enjoy the music on a junk like that you soon get tired and shut it off or lower the volume.
Accurate reproduction is not cheap to achieve and we are talking about the whole system here.
If you like accurate or not, that's another story.
If it's similar to a live performance and I can follow and easily understand everything, for me it's good.
Other people may like a "coloured" or even a "smoother" sound.
Live (unamplified) music is not necessarily smooth.
Conclusion: accurate for me is not accurate for everyone.
You never really know what's in the disc.
Accurate reproduction means that you can understand the music, you clearly listen what every performer is playing, all the details are always there.
Your brain doesn't have to work hard to understand the music.
The human brain fills the gaps, that's why you can listen to music on portable radios.
But if you are trying to enjoy the music on a junk like that you soon get tired and shut it off or lower the volume.
Accurate reproduction is not cheap to achieve and we are talking about the whole system here.
If you like accurate or not, that's another story.
If it's similar to a live performance and I can follow and easily understand everything, for me it's good.
Other people may like a "coloured" or even a "smoother" sound.
Live (unamplified) music is not necessarily smooth.
Conclusion: accurate for me is not accurate for everyone.
mikelm said:
Bandwidth conservation measure... thumbnails of attachments are in the works.... too make a picture show up it needs to be hosted elsewhere.
dave
Re: Rule 1:
😀
Quoted from sheldon: "That said, my favorite amps, in my system, are tubed (they have such a nice glow). As always, I reserve the right to practice hypocrisy, whenever it suits me. "
😀
carlosfm said:You never really know what's in the disc.
Conclusion: accurate for me is not accurate for everyone.
😀
Quoted from sheldon: "That said, my favorite amps, in my system, are tubed (they have such a nice glow). As always, I reserve the right to practice hypocrisy, whenever it suits me. "
😀
That's right! We are DIYers making hi-fi to listen to for us (and in some cases a SOF or family).
So, we can please ourselves, be hyproctical even or change our minds from time to time.
No harm in that except when we get a bit too evangelical in places like this.
So let's put our experiences forward for others to listen to or ignore; but at the same time being mindful that what we write is not without consequences. 😉
sss said:
Ah... I knew that it must have been a word NOT starting with "L"!
(L for Learner, in this instance?) 😀
sss said:
Of course not. We might use line level crossovers, digital crossovers, etc., but those are, ahhh, err, different. We call that voicing the system, certainly not tone control.
😉
Sheldon
sss said:
Even more phase shifts?😀
I don't have tone controls on my pre, but anywhere when a system only plays acceptably with tone controls, something's very wrong IMHO.
it modifies the sound - making it the way u want it to be
try it , maybe u will like it 😀
btw
did someone use opa843 as buffer or any other audio circuit?
try it , maybe u will like it 😀
btw
did someone use opa843 as buffer or any other audio circuit?
sss said:
Try tone controls?😱
My current (diy) pre doesn't have them.
Because all my life I had amps with tone controls (some defeatable, some not) and I simply don't like it.
To adjust 100hz and 10khz (more or less the "standard") is nonsence...
I always had the tone controls in mid position, and it worked fine.
My father had an amp that needed a treble lift to play music, but that was crap.
Oh, btw, my brother's big Vincent amp has a "source direct" switch to defeat tone contols.
But as the manufacturers make the amps to be pretty and not to play music, the layout of the fascia is very nice but the signal travels almost 1m from the volume pot to the source direct switch and back.
I disconnected all that crap, and also the loudness wire from the pot.
You just can't believe the difference.
Suddenly the amp begun to play music😱 , with those beautiful harmonics and transparency it could only dream of before.
Tone controls?
Just for being there they muck up the sound.
It always pays to have a short signal path.
sss said:
I have some here, but didn't test them.
Good specs.
But low psu voltage...
- Status
- Not open for further replies.