Who cares what happens IN a heat sink, as long as the transistors are cooled enough ?
How could you know where Dadod put his transistors in the vertical side ?
The Dadod's implantation is more clever than your, because the two sides of the push-pull will be at the same temp. Period.
So why this strange comment, because of this, that is revealer ?
I think some come here especially to be abusedor they haven't got the guts for self flagellation
More like finding a good reason to victimize themselves: "I'm such a genius and nooooobody loooooves meeeee, booohooo, waaa, waaa, sob, sob"
.
Every designer of a big power amplifier with multiple output pairs should. Because a thermal gradient in the heatsink results in a different temperature of output pairs. Output pairs are in parallel, yes they have some small Re like 0R1-0R33 usually, however different temperatures of their chips make different Vbe of each of them and thus different idle currents. So we have multiple pairs each loaded differently and each having different Ptot and temperature and this may make a problem like overloading some of the pairs.
It would be naive to expect that the whole heatsink has the same temperature. It differs not only in a vertical direction, but also in a horizontal direction.
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I don't consider <5mOhm down to 0.35mOhm as high ESR, do you?
Maxwell Technologies cell product lines Standard Series, XP™ Series, DuraBlue,Pseudocapacitors.
Whose talking about AC? As a substitution for voltage regulators is what I said - sonically better
Nobody said to get rid of bypass caps on pins of DAC which is where the needed PS speed comes from - the point was about having a large energy storage in the form of supercapacitor - I used the term 'stability' of PS under dynamic load conditions - many say this is a wrong technical term but I still can't think of a better one - if I used "non resonant" or "non-reactive" I'm sure there would be similar objections.
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So what, on the same note it could be argued that your layout is using efficiently less than 1/2 of the heat sink cooling capacity (the upper half). Rth is decreasing with temperature, so the upper half will get the bulk of the radiated heat, while the lower half will stay much cooler, depending on the airflow (convection) around.
Talking about magnetic effects, did I mention I'm cringing when I see the output inductor on the PCB, radiating straight toward the input stage?
BTW, I am not your competitor, so you can relax
Never anything nice from you, angry all the time.
There is possibility on my layout to put output inductor on the board (I don't think it's a big crime, in this layout there is drivers heat sink long alu plate between input and output)) but there is direct output too if one choose to put it outside close to loudspeaker connector, as I did in my build of this amp.
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It was not against you "personally" ;-).
Only the use of the word "attack" and that it implies .
And, yes, it is a question of language. In French, we don't say "Attaquer une théorie". We have a word for-it: "Réfuter" (Disprove ?). Not at all the same meaning.
Yes, I'm exasperated by this ambiance, reason while I, sometimes, sing loud or "cry", as you say, in the same tonality to try to stop the huggly music. You will notice it is always in reaction to a previous aggression. (See S..08).
I think I will leave this place. You are right, about me, everybody tend to be rude in a rude ambiance, not enough stability margin like in a country restaurant, and I don't want to turn like this.
Same for me. And I think a lot of us.Unfortunately, it is true.
These days, when I load a page here, usually about a half of it consists of ignored posts.
I'm sure our ignore list is very similar. They are few, but ubiquitous. The worse is some of them pretend to be EE, while they seems to be here only to show their c..k instead of trying to help others or try to discover something new for them from others opinions.
I suppose such behavior comes from self-centered view.
Well put!
I forgot about that type.I think some come here especially to be abused
A thin sheet of aluminum will do **** to screen magnetic fields. Make it 12mm thick and 200mm high on both sides of the board and we can talk about.
And please stop this mimosa pudica attitude. Expecting praises only is the worst way to learn something useful. If you don't want critical feedback, then stop posting about your stuff.
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Absolutely. I always wonder why the sole (?) of many heatsinks is so thin.
We usually do not take enough time to think about the thermal implantation, (relative) because it is not easy (impossible ?) to solve other way than try and error and it vary with ambient temp.
With the requisite of modern fast power Mos for ultra short connections, it does not help.
Some good advices ?
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No, this thread is for the discussion of John Curl's Blowtorch preamplifier, anything else would be off-topic
Wow !
I believe it is not simple, even affraying for a non specialist in sims like me ?
Thanks A LOT for this, George, i will try to discover.
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Thanks
I better checked before I posted
It probably isn't the factual content of critical feedback that is off-putting to those on the receiving end. It is your particular way of always trying to prove/demonstrate you are the smartest guy in the room, that what you happen to believe is the only real truth, and that your behavior is the ideal model that all other true EEs should aspire to.
Alrighty then.....
RME ADI-2 dac?
AKM 4490 based.....nice build quality from the looks and reports.
It has many dsp options including eq
My questions would be....
1) RME....reputation in pro stuff is good afaik ? This is stepping a toe into home audio waters based on a pro unit.....could be beneficial?
2) does the addition of dsp at this point help or hinder sq....I’m thinking maybe it’s a nice option for overall system tuning?
3) reports are awesome comparing it to or better than chord,benchmark,Mytek...
Any experience/familiarity with RME here?
This is a big investment for me and I’d like to get the best bang for buck possible.....if it’s beating $2500 dacs at $1,000 I’d say that’s good value?
No affiliation,just found it web cruising
Thanks, bob
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