John Curl's Blowtorch preamplifier

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janneman said:
The one big difference is that Scott, Syn, Edmond, Andy_c, Bob C etc never called me a clueless, pitchfork-wielding-villager with lesser education. They never try to artificially promote conflict by talking about 'us' and 'them'. That exactly is the rub here as SY and Chris B try to explain. The reference to Nelson Pass is an apt one. You reap what you sow.


This latest instalment to the “Blowtorch” thread soap opera is amusingly ironic, given your published comments in the Erno Borbely interview, esp. WRT the comment on the treatment of JC.
 
Moderation is not the easiest job in the world. And the pay is naff. 🙁
My opinion is that the moderators should redouble their focus on:
1) Defamation (of persons)
2) Dishonesty (especially by people trying to sell things)
3) Diversion (going way off topic)

Much of the technical info posted in this forum (regardless, as I have observed, of the experience and notoriety of the poster!) is quite unreliable, but it is clearly not the goal of the moderators is to make a technical reference site. Rather, this is a largely informal gathering place for exchange of ideas and practical knowledge.
 
G.Kleinschmidt said:



This latest instalment to the “Blowtorch” thread soap opera is amusingly ironic, given your published comments in the Erno Borbely interview, esp. WRT the comment on the treatment of JC.


Well, I don't claim to remember verbatim what's in the Borbely interview, but on the face of it I don't see a contradiction. Sometimes you must use different words to shine on another side of an issue. And some issues have more than one side anyway.

Jan Didden
 
syn08 said:
Not worse than, say, Wikipedia. It's a matter of setting the expectations bar.
I can't say whether it is better or worse, on the whole, but I agree this is a "reader beware" environment. Wiki has the advantage that the expectation is that information should be as accurate as possible and that the info is grouped and categorized and that it can be modified, corrected and contested. Advertising appears to be prohibited, contributors are anonymous. My personal experience of Wiki is that the information is of a surprisingly high standard - quite something when you think about how it is authored.
 
janneman said:
Sometimes you must use different words to shine on another side of an issue.


🙄


traderbam said:
I can't say whether it is better or worse, on the whole, but I agree this is a "reader beware" environment. Wiki has the advantage that the expectation is that information should be as accurate as possible and that the info is grouped and categorized and that it can be modified, corrected and contested. Advertising appears to be prohibited, contributors are anonymous. My personal experience of Wiki is that the information is of a surprisingly high standard - quite something when you think about how it is authored.


"3) Diversion (going way off topic)"


So no one gives a fudge about earth loops then?
 
Charles Hansen said:


Don't be coy, Chris. You act as if you've only been here a few days.

The reason it's unpleasant to post here is that the moderation sucks.

Anytime someone makes a statement or expresses an opinion that is not in line with Lipshitz, et al, the "thought police" come crashing in, hurling personal insults and making disparaging remarks:

http://www.diyaudio.com/forums/showthread.php?postid=1772320#post1772320

http://www.diyaudio.com/forums/showthread.php?postid=1772603#post1772603



Hi M. Hansen,
I have great respect for you and your products but i don't understand if you not agree with these answers why you don't answer yourself. My first question was for you, i would have liked to have your answer. Maxpou
 
G.Kleinschmidt said:
It is an industrial E-I isolation transformer with a 230V primary and twin 115V secondaries. I use this one at the mains input, prior to the two 225VA step-down toroids (one for each channel).

The secondaries are connected in series with the centre tap connected to mains earth and the chassis.

This allows the electrical earth of each amplifier channel to be (safely) left fully floating,
If I use my dedicated power ring into my listening room and "isolated" it like this back at the distribution board, what does this do to mains safety, Earthing and all the other equipment that will be connected to this isolated supply?

This is a genuine question, I am not about to "jump" on Glen.

Maybe the answer in another thread?
 
janneman said:


I did learn here a lot from people like Syn08, Scott W, Edmond S, Andy_c, Bob C and apologies to all I forget to mention.
They also don't as a rule post complete schematics; which I wouldn't use anyway, I like to take ideas and develop them myself.

The one big difference is that Scott, Syn, Edmond, Andy_c, Bob C etc never called me a clueless, pitchfork-wielding-villager with lesser education. They never try to artificially promote conflict by talking about 'us' and 'them'. That exactly is the rub here as SY and Chris B try to explain. The reference to Nelson Pass is an apt one. You reap what you sow.

Jan Didden

Some people never stops learning, some grumpy old men think they know everything, and that they are the only one that knows.
 
Charles,

It’s unfortunate if people take a sarcastic comment about LP de-magnetization as having any personal content. I get the little email notices on my desktop while I work. Yes, sometimes I shoot off a zinger. I think I later checked out the “technical” basis of that particular device. The residual magnetism of an LP IIRC was well below the earths static field and the device was only capable of reducing it by 10%. If I bought a bulk tape eraser that worked that poorly I would return it. The induced fields in a cartridge, supposedly from the LP moving around and around, were certainly well below (orders of magnitude) the background H field noise. A cartridge poorly designed (or well designed depending on your viewpoint) enough to generate any pickup from this would be rendered unusable due to hum pickup.

This is a casual hobby for me, I have nothing to sell, don’t promote our products, and avoid commenting on other vendors products. I try answer any questions when I feel one was asked. Good solid instrumentation engineering principles go a long way and encompass a lot more that circuit topologies. Giving wire directionality et al equal billing is a disservice to the probably hundreds of people who never post here but come to learn something.
 
OK, now for some clarification. The word 'associates' came up in post 17252 from me trying to include others of like mind with me, at least at times. They will often chime in, in order to clarify the answer to a question or challenge. I was 'called' to task about who these 'associates' are, as if we were of some 'secret order' like POOGE, once active on these issues. I just called my local fellow engineers and asked their permission to include them as 'associates'. That is ALL there is to it.
What a reaction! Some seemed let down, that they were not selected from the first, and some because they probably not be included in the selection at all. So what? It was all a casual association, anyway.
Now when it comes to 'insulting' behavior. I find that about 1/2 of the contributors here to be extremely insulting to the other 1/2 of contributors, because for some reason, making fun of another's beliefs based on their own experience, is not only tolerated here, it is put forth as laudable by the moderators. This is what chases Charles Hansen away, Walt Jung, and many others, who don't have the patience for it, AND have something better to do with their time.
I come from another culture. Gang fighting. I LIKE to 'rough it up' intellectually of course, just like I liked to impose my physical stature in the long past, to get 'respect'.
Most of my close friends, like Jack Bybee, and my current business partner, think that I waste my time here, and they try to discourage it. So it goes.
 
Scott, your bringing up demagnetizing vinyl records was meant as an implied insult to Charles Hansen and others, because they are directly involved in experiments like this, and even offer products that do this sort of thing.
If you wanted to talk about this subject, why did you bring it up here? Were you looking for some 'action' either positive or negative?
Now that does not mean that we can't have a sense of humor about audio.
I have the audio joke book done decades ago, and it is still very appropriate and funny, but it is not what audio design is.
Now, even the BLOWTORCH was designed as a joking statement. YES!
OUR preamp case was going to out-Krell, Krell, out-Levinson, Levinson, and so forth.
Our first volume control knobs were so thick that I nicknamed them 'Dolly' knobs, and suggested that we cut them back a little for production. And so on. However, we made OUR knobs do something useful, like real air scoops on a sportscar. They multiply torque and damp the inherent jerkiness of the Shallco switches and TKD pots. They offer 'refinement' just like big tire rims often do on sports cars.
Still, Scott, why hassle us? Why not just contribute your best? We always appreciate that.
 
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