I have also used the same trick as Parasound does, in several of my power amp designs. The Zobel (or 2nd Zobel) just at amplifier binding posts. This, together with inductance of wires going from the PCB, may allow for stability optimization. I do not know if it was a goal of Parasound designers, but it might have been so. The difference in wire length of both channels would be just a question of amps geometry.
Dan,
Can I respectfully suggest that you start your own thread? Much of you speak of is not electronic engineering, which is what this thread was originally created to discuss. Whether or not your suppositions have an affect on performance/hearing/perception is not the issue. My problem with it is it has degraded the s/n of engineering topics to the point where it is difficult to gain any practical information regarding circuit design.
If, on the other hand this thread is now open season for anything, then so be it, I'll have to look elsewhere for engineering discussions.
Howie
Can I respectfully suggest that you start your own thread? Much of you speak of is not electronic engineering, which is what this thread was originally created to discuss. Whether or not your suppositions have an affect on performance/hearing/perception is not the issue. My problem with it is it has degraded the s/n of engineering topics to the point where it is difficult to gain any practical information regarding circuit design.
If, on the other hand this thread is now open season for anything, then so be it, I'll have to look elsewhere for engineering discussions.
Howie
“ As an alternative to our original dualistic approach, we present here our spin-mediated consciousness theory based on pan-protopsychism. We postulate that consciousness is intrinsically connected to quantum mechanical spin since said spin is embedded in the microscopic structure of spacetime and may be more fundamental than spacetime itself. Thus, we theorize that consciousness emerges quantum mechanically from the collective dynamics of "protopsychic" spins under the influence of spacetime dynamics. That is, spin is the "pixel" of mind.”
Superb!
Superb!
First I need to figure out what those ferrites are there for.....are they just for mains RFI protection or are they for something important such as to match voltage to the digital section, etc?
Almost a realization of the Infinite Monkey Theorem. Unfortunately the author bashed the keyboard with a stone while the rest of the monkey team soiled it. Nevertheless, it's still a masterpiece, clearly proving that monkeys are not really random generators.
These guys are funded by someone, they clearly have nothing to sell. Maybe Musk will fund them and send them to Mars.
??? I have it on the highest authority what goes down here stays here. Muck up all you want I won't stop the criticism.
I really don't want to get into this, but I suspect it is necessary.
First, the 'Zobel Network' is not very exotic, and a minor player in amp quality. It appears to really be a high frequency low impedance load for the power amp's stability. The values rarely change much from amp to amp, and so are applied universally from one amp to another. A theoretical 'improvement' was last suggested by Richard Marsh some time ago, of just using a load resistor and not keeping the series cap. This can cause problems with overheating the load resistor.
In the case of the Hint amplifier, what it was supplied with seems adequate. Anything else will not give much. Other amplifiers might be another answer, but the Hint amplifier cap is pretty good, at least as far as I can tell. The biggest potential compromise in the output are the output connectors. You should test them for steel content. Get a magnet, and if the magnet is extremely attracted to the connector, it should be replaced if possible. A potential improvement also 'might' be to solder directly the output cables to the output connector. Usually this is almost impossible without a huge soldering iron or a flame torch. Is it worth it?
First, the 'Zobel Network' is not very exotic, and a minor player in amp quality. It appears to really be a high frequency low impedance load for the power amp's stability. The values rarely change much from amp to amp, and so are applied universally from one amp to another. A theoretical 'improvement' was last suggested by Richard Marsh some time ago, of just using a load resistor and not keeping the series cap. This can cause problems with overheating the load resistor.
In the case of the Hint amplifier, what it was supplied with seems adequate. Anything else will not give much. Other amplifiers might be another answer, but the Hint amplifier cap is pretty good, at least as far as I can tell. The biggest potential compromise in the output are the output connectors. You should test them for steel content. Get a magnet, and if the magnet is extremely attracted to the connector, it should be replaced if possible. A potential improvement also 'might' be to solder directly the output cables to the output connector. Usually this is almost impossible without a huge soldering iron or a flame torch. Is it worth it?
The Hint, no doubt, does not deserve to be torched. As to possible gains: soldering cables directly to the output connectors could lower resistance, possibly, but the uOhm that might be gained seems irrelevant to me. Unless, of course, said connectors exhibit micro diode behavior 🙂.
Probably not. Thankfully Bob listens to what you say. For what it's worth I might do something about the connectors onto the board.
IMO just "normal" soldering iron gun (pistol) will make the job, at least it does for me.
Attachments
Well, that's the price ya pay for the randomly spaced moments of brilliance. Very very poor S/N, amazing peak to average ratio. That's the JC thread. God bless us every one.
Yep!
I "believe" that I might one day furnish a rational explanation of why tube power amplifiers sound different from their solid state brethren. I have no problem with the word and its similarity with that other word faith. There seems to me there is a massive overreaction going on. I think that the emergence of "philosophical materialism" and "scientism" isn't always that helpful. They can be as dogmatic as anybody. Is audio about science or is it about art? Is music science? Is Mona Lisa's smile?
Let people have diversity of thought and don't make everything about science, as much as I personally like science, others will just fall asleep. As a late friend of mine said "Life is too short."
I find myself agreeing with much of that.
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We should frame this sentence, and place the painting on the wall facing the front door of this thread.
God have mercy on us, if I continue to read (silently) this thread for those reasons, finding, sometimes, very interesting things both in the most scientific and delirious comments, a little more tenderness between us would make the noise less unpleasant.
This is especially for those who think they are on the scientific side. The true scientific process is based on *doubt*. Which begins with his own certainties. It's the opposite of a religion.
Even in the most delirious conclusions, there is always something to learn from the observations that initiated them.
It's about audio and music here. A thing that is primarily for our sensibilities and the emotions they provide.
It is a bad idea to want to transform a massage room, (even if they are sometimes a bit naughty ;-), in a chirurgical operating room.
I drink to that.
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You're already being misquoted (or is it mis-interpreted?) about this. Belief is of course internal and (most but not all would agree) reality external. Matrix fans and other deep-thought folk excepted.
Science is a moving target; Einstein himself was both the last of the great classical physicists and the first quantum physicist (his only Nobel). The issues that he worked with in his adult years were about the reconciliation of these fundamentally conflicting viewpoints. Of course you know all of this.
Current zeitgeist in both our countries is anti-science and we'll all suffer for it. Maybe not as much as our grandchildren, but.
All good fortune, and goddess bless us all,
Chris
What about this one:
"Lasciate ogne speranza, voi ch'intrate", most frequently translated as "Abandon all hope, ye who enter here."
We live in a time of wars and rumours of wars. My own country is approaching a second Civil War but nobody dares to talk about it. A little more tenderness would indeed serve us all well. If there is a benign Master-Fixer, this is your cue Big Guy.
All good fortune,
Chris
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