John Curl's Blowtorch preamplifier part III

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I never ashamed to ask a question and learn, I remember that forum too, pity it was closed.🙁
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Damir
there is nothing wrong about asking for help.
The thing is that you asked for help and some of us gave you good advices, but you decided to ignore the advices you got and asked the same questions again and again, hoping that we would agree with you.
We never did that.
That's one of the reasons that some of us isn't surprised when the RNM super duper AMP blows the OPS transistors.
I see that RNM don't understand the issue, but that is in my opinion his problem.

S
 
Funny, circa 1974 we did a buy resale on a comparator where the former test engineer measured the offset with a standard op-amp test loop on an old Teradyne J263. Well the latest mask set oscillated and having no control over that I just soldered a 5uF cap to the output and lengthened the test delay. The test cable/fixture capacitance became just into the right range.

Yeah, programming a J263 controlling Teradyne M365 computer (we were still using them in the very early 80's) was a lot of fun, in particular that 256 character alpha numerical display 😀.

Good example 😀. I always had lots of troubles explaining to people that the output capacitor in a linear power supply is usually the loop compensation element, so a 10nF ceramic cap at the output, intended to remove traces of HF crud, could make the power supply sing like a soprano, even if a 1000uF electrolytic is in parallel 😀.
 
Master, could you illuminate us with your wisdom ?

Thank the force to have been with us and allowed us to listen to music for 60 years before benefiting from your revolutionary discoveries.

He is expert. He can do what ever he like.

Guys, you need to find something more productive to do than trying to argue with me. Sorry, I'm not playing, happy listening for the next 60 years!
 
Damir
there is nothing wrong about asking for help.
The thing is that you asked for help and some of us gave you good advices, but you decided to ignore the advices you got and asked the same questions again and again, hoping that we would agree with you.
We never did that.
That's one of the reasons that some of us isn't surprised when the RNM super duper AMP blows the OPS transistors.
I see that RNM don't understand the issue, but that is in my opinion his problem.

S

I don't remember it was like this.
 
Right, this diffracting bullet in the center. I apologize.

My Dearest Professor Tournesol, may I dub you The Don Quixote of Audio ...
Touched. (May-be I'm closer to Rossinante ?)

About horns and to explain the windmills that I hunt, about micro dynamic, separation, details, some videos to share with you my penchant for horns. (The last reveal the importance of close listening.)
YouTube
YouTube
YouTube
YouTube
 
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I'm not so sure. Once you read all the specs, all the measurements on 3-axis g-forces around the ring for two different cars - could you truly know which one you preferred to drive. Exactly how the feeling in the wheel would be as you start turning into a bend. The motion/feel as you run over a 3mm stone at 160 mph.

Now you drive them - and???

My point is that cars are ALSO well characterised by a lot of measurement but when coming to the more fine grained and delicate aspect of driving it - you will see the same discussion in a racing forum as you do here - this is a guess - didn't check any. "Brand A has much better feel when cornering - you cant trust those G measurements" ? ... 😉

Until racing becomes un-manned, it will not be enough with just performance figures. This will happen eventually/probably to racing, but not for audio 🙂

This is all tiny detail "geekery" and that division will never be accurate or precise as long as humans are involved and has a say.

This doesn't mean that its not fun and interesting... I think it is!

//

There will always be a human element and a feeling, sure. You can have two cars with similar overall metrics, identical laptimes, and very different feel. The difference is, those things can still be quantified.

Ferrari and other F1 teams spend vast sums of money on datacenters / HPC / machine learning in order to build models of how to correlate the sensor data with driver feedback. There are similar efforts for street cars for various components, like suspension and electric power steering tuning.

I'm not aware of any such effort in audio that's been rigorous or successful.
 
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As Matt put it, it is different but how do we know it is better?
Right, studying the measurement is one thing a customer can enjoy and brag about the High Fidelity nature of his amp.
I replied to your question on how. If a customer wants to know if it is better, there is a right way to do it as opposed to boutique audio marketeers trying to steer them towards, i.e. cable burn-in or long term listening.

Guys, you need to find something more productive to do than trying to argue with me. Sorry, I'm not playing, happy listening for the next 60 years!
Try "you are on my ignore list" and see how he reacts. After all, that's his favorite move when he can't debate.
 
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