This is down to average 17 year old internet troll standards. I did hope we were above sinking this low now. Sigh.
I am referring to envelope modulated signals where both the fundamental and modulator are below filter cutoff. My very first example being the 20k modulated by a 2.5k.
Tomorrow I will post some jpegs of what I refer.
Thanks again,
Jn
Tomorrow I will post some jpegs of what I refer.
Thanks again,
Jn
Except you didn't.
Actually I find the ongoing Ballad of Richard's amplifiers amusing.
I know. Richard is continually bragging on about it. He likes telling us what a nice kind generous person he is.
You completely and utterly misunderstood what was said.
repeat, you misread...
A BMW costs more than a Hugo. I am assuming that one shops carefully to get good value for money spent. Instead of jumping to wrong conclusions about what someone meant, you could try asking first.
If a dac uses good parts: dac chip, clocks, many-layer PCBs, discrete voltage regulators for analog audio circuitry, etc., then a dac may be costly to build. If a dac were built for personal use, the case can be quite utilitarian. I have used an old file server case since it was shielded pretty well. If someone wants to make a dac using costly parts to sell, then the case may have to be nice looking to appeal to the particular market segment. That would be the kind of situation Richard seemed to be describing, seemed to me anyway.
I am coming to the end of a life that I have chosen free and adventurous, having never sacrificed my passions for money. I’m probably older than you. More experience? It's like culture, life distributes it over time if we keep our eyes opened.
But, once again, you still seem to view relationships on a battlefield of conflicts or competitions. Personally, the only thing that interests me is the exchange and the only real competitor: myself, trying to do the best I can.
I was challenging you on rail sticking. It was just to show how vain, negative and cheap such an attitude can be.
I would prefer that we exchange friendly on various ways to address as elegantly as possible this small detail of design of an amplifier.
But your level of frustration is such that you have refused all the hands holded in your direction by spitting on it.
And seem to enjoy yourself only in an agressive attitude of contempt for others. Time for an auto analyse ?
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Challenge of the day. Build a discrete voltage regulator that has better specs (ripple, noise, regulation, output impedance, frequency response, stability) than the best ICs available today.
Except if you are doing the evaluation as subjective, sighted tests. Which is what is always to be assumed when reading your contributions here.
Witch is ? (The best available IC : [ripple, noise, regulation, output impedance, frequency response, stability]).
As all circuits are always a compromise between various parameters, is-it possible one exists better on all of them ?
your case is worrying.
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This data was collected via SnapEDA’s analytics by looking at downloads from our part model library (symbols, footprints, and 3D models). Millions of parts are evaluated on SnapEDA annually,
Best linear reg --> - LM1117MP-3.3 by Texas Instruments.
Can be set to higher voltage out.
Is it really the best?
THx-RNMarsh
Best linear reg --> - LM1117MP-3.3 by Texas Instruments.
Can be set to higher voltage out.
Is it really the best?
THx-RNMarsh
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The easiest thing to achieve is less noise when you simply stop responding or at least rippling at a much lower frequency and more stability while creating your output.
Hans
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What I have recently learned from Markw4 is that cheap Chinese knockoffs or even their own products, may MEASURE OK, but might not sound that good. Apparently, they will start with a good chip or a good discrete design (sometimes one of mine) but their final product will lack in audio quality, as established by the listening experience of serious listeners. This is unfortunate, but apparently how things are.
Mark has taught me from his experience in dacs about this.
Independently, I tried a JC-2 line preamp Chinese knockoff that a colleague sent me. It looked and measured great! However, another colleague got one, listened to it, then tried to get it to sound 'good'. This engineer had to replace virtually every passive part, including the volume control, wire, connectors, resistors, caps etc. to get it acceptable. This is the problem that Markw4 also has found. I believe!
Mark has taught me from his experience in dacs about this.
Independently, I tried a JC-2 line preamp Chinese knockoff that a colleague sent me. It looked and measured great! However, another colleague got one, listened to it, then tried to get it to sound 'good'. This engineer had to replace virtually every passive part, including the volume control, wire, connectors, resistors, caps etc. to get it acceptable. This is the problem that Markw4 also has found. I believe!
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I didn't say it was his logic, THE logic in general of basing a new hi-end product on that chip. For 10K I would expect full bespoke FPGA's etc. We shall have to see, I don't expect Luxman to put out something at absurd margins.
It's hard to keep up with this thread, but I have just spent 2 hours going through the
last 2 days and I'd like to respond to the comment about incompetent engineers.
When I was working for a large aerospace company about 15 years ago an EE engineer had designed a new board for a product, he sent the schematic to PCB layout to be be made.and they sent it off to manufacturing. On the schematic he had all of
the IC's decoupled with a .1uf capacitor on the + and - supplies.
When I got the first boards to test, in engineering they had a nice little farm of 36 .1uF
capacitors next to the 1000uF capacitors from the power supply.
They populated 5 boards without the layout being checked.
I can imagine that smaller errors would be easier overlooked.
PS.
Reality, what a silly idea, everybody's reality is different.
last 2 days and I'd like to respond to the comment about incompetent engineers.
When I was working for a large aerospace company about 15 years ago an EE engineer had designed a new board for a product, he sent the schematic to PCB layout to be be made.and they sent it off to manufacturing. On the schematic he had all of
the IC's decoupled with a .1uf capacitor on the + and - supplies.
When I got the first boards to test, in engineering they had a nice little farm of 36 .1uF
capacitors next to the 1000uF capacitors from the power supply.
They populated 5 boards without the layout being checked.
I can imagine that smaller errors would be easier overlooked.
PS.
Reality, what a silly idea, everybody's reality is different.
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Good PCB layout people are hard to find. They often do not understand the circuits they are laying out. I had similar problems 35 years ago, RJM1.
Automatic placement and routing in action. Incompetence at all levels, from the EE, to the management (professional PCB layouts are supposed to be subject to collective reviews, as much as IC layouts).
On complex PCBs there are much more subtle errors that can be made, like a bad clock distribution tree.
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