But once again:
I hope every buyer of the current A1 knows what's under the hood - and there will be no complaints.
Since the heat wave caused by climate change has left northern Germany, the current A1 has been playing perfectly in my living room - I have no complaints to make.
Only improvements!
#
The grandmasters at Musical Fidelity's headquarters could definitely ... if they were allowed to, could /know and wanted to, yes then!
But what's the point? I like the A1, even the myth.
I hope every buyer of the current A1 knows what's under the hood - and there will be no complaints.
Since the heat wave caused by climate change has left northern Germany, the current A1 has been playing perfectly in my living room - I have no complaints to make.
Only improvements!
#
The grandmasters at Musical Fidelity's headquarters could definitely ... if they were allowed to, could /know and wanted to, yes then!
But what's the point? I like the A1, even the myth.
Hi I see I am dragged into this (again). All good but you’re highly biased which does not do good to neutrality. The Master, the great, I like the little englishman, I like the A1, magical sound, the beautiful Musical Fidelity A1, kudos to Tim, Great Grandmaster Tim de Paravicini (if you are idolate please spell the name correctly), mentioning the CEO Heinz Lichtenegger ... and so on. So that could possibly indicate you don't really want to hear what others think about it (or their criticism) nor is the interest in others variations really wanted. You have an A1 like biased opinion embedded in details and nothing is going to change it. There is therefor not much relentlessness in the analysis.
It is just a device. It is also just a device cooking itself. Those that repaired them know the same. Those that buy them feel & believe about the same. Two different worlds 🙂
It is just a device. It is also just a device cooking itself. Those that repaired them know the same. Those that buy them feel & believe about the same. Two different worlds 🙂
Of course there will be complaints, you have already occurring errors described in detail.
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Increasing olg is only doctoring on the symptoms but does not eliminate the cause, which is the output stage.
After conversion to EF, olg could be increased to further improve thd, if desired.
Both methods may have a similar effects initially but if one insists on keeping the original ops (why?), finally there is much less headroom for further improvement.
After conversion to EF, olg could be increased to further improve thd, if desired.
Both methods may have a similar effects initially but if one insists on keeping the original ops (why?), finally there is much less headroom for further improvement.
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I like the challenge. I will go back to drawing board and post later. Not necessarily practical for modding the original board, just for fun.
@jean-paul
You lay out - exegesis. No more and no less. You are an expert at this, a rhetorically adept one at that. When I write “relentless”, I mean it.
I know that.
Which ones would that be please.
I don't like the
- the gear noise of the hot motorpot,
- the insufficient internal height of the housing, and feet
- the inadequate ventilation,
- the insufficiently dimensioned mains transformer,
- ...
- the blue LEDs
- ...
It is not a thread titled building an amplifier! Or "bashing" one!
Furthermore, I have no interest in an argument with you.
Beste Grüße, best regards,
HBt.
This is all correct,
but one should also bear in mind that the resulting product is then no longer a MF-A1-offshoot, the DNA has been erased.
That is why I advocate not changing certain points as long as it is still an A1 concept.
Is this understandable and is there a willingness to accept this attitude?
HBt.
I am
- neither a believer nor do I belong to any kind of degenerate religious community.
- an ateist, absolutely neutral, and basically not biased at all.
Personally,
I'm only interested in the often-mentioned laying stones /the Lego-bricks, i.e. solution manifestations.
Bye and back to the topic of this thread,
HBt.
Some A1 owner who desires a more neutral sound may not care about point 1.
By the way, the biasing scheme persists, a part of the DNA is still there.
That also answers point 2.
BOM used BJT's
8 NPN BC550C 4 Q16,Q14,Q15,Q8
9 NPN BC337_40 2 Q10,Q9
10 NPN BD139_16 1 Q4
11 NPN TIP3055 1 Q5
12 PNP BC560C 4 Q13,Q12,Q11,Q3
13 PNP BC327_40 2 Q2,Q1
14 PNP BD140_16 1 Q7
15 PNP TIP2955 1 Q6
thx M0rton, it's very kind ...
😎
Seems like odd junctions: Q11-Q12-Q13 and Q14-Q15-Q15. Still missing a resistor?
For the resistor, 470 is better. Rule of thumb is to give at least 1ma bias current for each transistor.
#134 might go too far.
I think there is positive feedback going on.