Of course, I meant a good designer.
Of course again, I was referring to modifications like the ones I saw in the two mono chassis, not to what could be assembly errors that can obviously always exist. 😉
Frankly I don't get your point: what do you really want (to mean)?
If it's not a motorized ALPS pot (just as it seems) then what is it?
And would it be even higher quality than an ALPS and would work up to temperatures of let's say 80°? 😳
I din't realize what you want to talk about. 🤔
you cannot work at 80° is basic
the amp wotk at 60° in summers the alps at 70°, is fine !!,plus have min 10% to 20% more safety work temp
It is a faulty pot end of story
the amp wotk at 60° in summers the alps at 70°, is fine !!,plus have min 10% to 20% more safety work temp
It is a faulty pot end of story
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In fact it was an absurd hypothesis to say that if an ALPS can work up to 70° a non-ALPS potentiometer as you hypothesized that it could even be certainly cannot work at more than 70°.
It was more than clear.
Okay, it's is also enough for me.
It was more than clear.
Okay, it's is also enough for me.
The crux of the matter is the fact that CEO subliminally equates extreme heat generation as a quality feature. At the same time, the official device specifications seem to have sprung from the writer's imagination.
Incidentally, it should also be noted that the small toroidal core, the mains transformer, also gets quite warm, regardless of the cover as a cooling surface for the TIP3xCs.
Everyone can imagine what the lid would have had to look like as a real heat sink to achieve a comfortable maximum temperature of 40°C and what size the toroid would have had to be.
The fact that Tim de Paravincini's circuit proposal sounds absolutely great is irrelevant if the physical implementation is blatantly flawed. Everything here revolves around the external design - the A1 is an eye-catcher.
Incidentally, it should also be noted that the small toroidal core, the mains transformer, also gets quite warm, regardless of the cover as a cooling surface for the TIP3xCs.
Everyone can imagine what the lid would have had to look like as a real heat sink to achieve a comfortable maximum temperature of 40°C and what size the toroid would have had to be.
The fact that Tim de Paravincini's circuit proposal sounds absolutely great is irrelevant if the physical implementation is blatantly flawed. Everything here revolves around the external design - the A1 is an eye-catcher.
You will never see a 40° ClassA amp ,we shot for 55° is a fact ,just buy AB ones
That's, now you know that it is an ALPS. 🙄
However, please note that you are making more than one hypothesis now.
You are hypothesizing that the pot inside A1 is the 70° type and not the 60° one, but you don't know exactly which APLS model it is.
Furthermore, you are still hypothesizing that the temperatures inside the case are not higher than 70°, but obviously you can't know that and yours is just another hypothesis.
Furthermore, you are still hypothesizing that the pot gear and the pot itself do not reach and exceed 70°, but obviously you can't know that either and yours is yet another hypothesis.
On the other hand, if the external part of the heatsink which is the cover reaches at least 65° as stated in this thread, we can easily deduce (not hypothesize) that the temperature inside that stupid case is almost certainly higher because among other things that case except for small vents is almost completely closed.
But you yourself also said that.
And I think that should apply to you. 😉
I don't need a purchase recommendation, thank you - the A1 is on my desk for other reasons (which I won't go into here).
Regarding the provocative 40°C I mentioned, we are actually talking about a 10W amplifier! In stereo, of course, i.e. 2 x 10W in operating class A. And these candidates designed as push-pull amplifiers do not have to dissipate more losses as heat than I demand.
The power output that the A1 is capable of for a short time is irrelevant -> as soon as the THD limit of 0.03% is exceeded, we no longer need to talk about the design!
hope that your personal opinion traslate in dimmamation of serius soric Musical Fidelity story
I'm sorry for you ,fact 70° , the amp is at 53° noproblem
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The internal temperature of the enclosed air measured by me is exactly 53°C at the sides (distance 25mm).
What value will the thermometer be in the immediate vicinity of the power transistors (i.e. in the center of the housing)?
Please stop the petty squabbling, please ... 🙏
I can only say that after two hours of operation, my gearbox makes loud, strange noises.
What value will the thermometer be in the immediate vicinity of the power transistors (i.e. in the center of the housing)?
Please stop the petty squabbling, please ... 🙏
I can only say that after two hours of operation, my gearbox makes loud, strange noises.
You are not paid to do an analysis do you? Then we are giving free input.
The discussion if Alps potmeters are fine to use in an air fryer is off topic. Comments denying well-founded criticism are better suited in other threads.
Min are 12W fix in classA still summer time 55° for the price is good
clipping in AB is at 25w on demand
No, I can reassure you - this is my private pleasure and also my device (properly paid for!).
btw
I always give free input.
Good. Then nothing stops you from improving it although building a new one in classic class A fashion with twice the transformer size and loads of vertical aluminium fins would be a shorter job. Possibly more effective. Or live in 2024 and try out an excellent class D device, improve it where possible and just use it. Silent power efficient cool running small sized devices are a blessing in disguise.
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I will determine this by measurement,
but of course this specimen will be able to drive up to 40Vpp.
The original regularly died at the RAIL limit or reached the second thermal breakthrough before that.
@jean-paul
Why should I do this? It would not be my first experience?
Let's stick (a little while) with the buyable A1 for now, shall we?
Regards,
HBt.
Why should I do this? It would not be my first experience?
Let's stick (a little while) with the buyable A1 for now, shall we?
Regards,
HBt.