John Curl's Blowtorch preamplifier

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syn08 said:





And these measurements, please!


PMA said:
How about "Search"?


Pavel,

I have tried hard to identify/search your posts re: measurements; I failed to find any relevant experimental data posted under your name.

This being said, I have to assume that you do not have or do not want to disclose any experimental results to support your claims. Fine by me, but not so good for your credibility and/or reputation.
 
Probably this:
 

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What is it with this thread?

:cop:
It did not start well, did not correct itself and has not improved. I wish we could put you all in a room together. I have a feeling your words and actions would be considerably different. We ask once again to show a little decorum in this and all threads here at diyAudio. There are other places on the net to conduct your ******* matches, please feel free to take those attitudes there. If there is no noted improvement in the manner in which you conduct yourselves, we will take action including extended bin time. The choice is yours. This is getting very tiring, I feel like a GD babysitter!



You are welcome to email me or any of the mods with your comments.
 
:captain:

Everyone, there appears to be a concerted effort by Jam, SE, and several moderators to derail the 'Blowtorch' thread and put it to bed. I have maintained discussion on this thread, somewhat beyond just what the 'Blowtorch' preamp was composed of to elaborate on related design issues when possible. As I have no permanent place on this website or any other, I have tried to maintain this one thread as the place to give info and answer questions. We have been VERY successful in keeping viewer interest over the years, but apparently I am somehow violating the 'spirit' of the website, by not having a dedicated thread of my own (that has never been offered to me) to do this. If this keeps up, I suspect that the thread moderators will stop the thread entirely, and leave me to 'swing in the wind' so to speak. Any suggestions?

John,

First, there is no "conspiracy" between Jam, SE and any moderators. The thread that SE started will be deleted. I suspect that many have noted what a zoo this thread is and come up with various ideas to "improve" it whether sincere or not.
I assure you that the moderators are quite sincere however...

We moderators, have been studying options on what to do with this thread due to frequent complaints by John Curl, Charles Hansen, and some others that we don't delete enough off topic posts, insults, different opinions, and topics that don't interest John. I personally feel that a new thread or threads THAT HAD A CLEAR TOPIC STATEMENT as the first post might be helpful because then insults, discussions of other circuits than those defined by the TOPIC STATEMENT, and anecdotes of old employment and old hatreds would be OFF TOPIC , and deleted by the mods.

I think that in addition, that John should start various threads like other members do and have each defined by a topic statement so off topic posts will be deleted. By having multiple threads, that are narrowly defined, he can then discuss various topics, such as "my years at Ampex" and anyone else who wanted to discuss Ampex could join in. That would keep out the riffraff! 😉 Other threads could discuss specific circuit designs. Various threads also are easier to read- I wonder how many people will start at page one of this thread- its too long and cumbersome.

So it appears that now that I have spent time trying to help you with your complaints, and proposed a possible solution to you in a private e-mail, (one option being to close this thread-but not delete it of course!-and open new ones) you suddenly LOVE this thread and everything about it and throw your appeal out to the members "Please help me in my hour of need!"


I am somehow violating the 'spirit' of the website, by not having a dedicated thread of my own (that has never been offered to me) to do this. If this keeps up, I suspect that the thread moderators will stop the thread entirely, and leave me to 'swing in the wind' so to speak.

Violating the "spirit " of the website by not having a dedicated thread? where did that come from? You DO have this one thread and yes, I proposed closing it, so that you could get a fresh start, as I mentioned above, by starting new threads with narrowly defined scope. This was due to your complaints about how the thread is, not because you don't have a proper dedicated thread or something...

Since you now just love having just this thread where anything goes, it's fine with me if you want to keep it, just stop complaining...we have proposed ways to help you, and you have rejected them.

I reserve the right to shut it down at any time if it reflects even more poorly on DIY Audio, and this poor behavior continues. It has nothing to do with John's "straw man " of him not having a "Dedicated thread" of his own but has everything to do with the behavior here, including his..

Variac

:captain:
 
Re: Re: Re: PIM

syn08 said:


Bob,

You just described a lock-in-amplifier. Never thought about, it will be a nice application for my old PAR lock in.

But then I can't imagine an amp with zero IMD and significant/measurable PIM...


Hi Syn08,

Right you are!

I also have difficulty imagining an amplifier producing measurable PIM without producing similarly measurable IM or other measurable distortions.

Cheers,
Bob
 
QUOTE]Originally posted by Cal Weldon
What is it with this thread?

:cop:
It did not start well, did not correct itself and has not improved. I wish we could put you all in a room together. I have a feeling your words and actions would be considerably different. We ask once again to show a little decorum in this and all threads here at diyAudio. There are other places on the net to conduct your ******* matches, please feel free to take those attitudes there. If there is no noted improvement in the manner in which you conduct yourselves, we will take action including extended bin time. The choice is yours. This is getting very tiring, I feel like a GD babysitter!

You are welcome to email me or any of the mods with your comments.
[/QUOTE]


This is like the Wild Wild West as far as developing a new way to share ideas, it seems to have some teething pains as far as getting off topic and the egos clashing, but it would be a shame to shut it down over words. Somehow there needs to be an unwritten code of ethics that keeps the dominant "geniuses" from stomping all over the less enlightened and a means of controlling the sidetracks so the off topic banter; the cable and Bybee discussions can be weeded out , a simple "this is off topic reminder by the moderators/participants" to regulate it.

It started out as the Blowtorch thread but has evolved into a rolling discussion of all things relevant to low-level circuit design. This discussion has taken on a religous fervor and there might be a need for some give and take concerning the possibility that there are effects outside of the norm that do exist. They need to be discussed without the bible thumping. I feel a lot can be learned from the high resolution technical side and alot can be learned by also keeping the discussions in the real world.

Maybe someone should define the subject matter and once agreed upon continue from there and TRY to keep moving forward in an open minded fashion. Maybe it's just not possible for the reasons alluded to in an earlier post. It would be a pity.

Just a thought, Mike.
 
syn08 said:

A) simulation, B) simulation, C) don't know how this is related to the topic.

I'm sorry, I still fail to find the relevant experimental results. But as long as John likes your picture, my opinion is probably irrelevant. Good luck!

Over and out.

I still do not know experimental results of what you want to see. Related to what issue? PIM? Distortion? Transient behaviour? Anything else?
 
I would think that the number of hits on this thread would give a more accurate picture as to why this thread has become 'permanent' or 'sticky', not some moderator's personal opinion as to its relevance to whatever they are interested in.
For example, I like to relate the history of audio design, because I am part of it and have a good memory of who invented what and when. When I give details, such as my working years at Ampex, I may put some people off, who could care less, but it is important to me to give enough detail, so that what happened in those early days is not forgotten and design credit is then given to another, who might have reinvented the design, decades later. This happened on this very thread, just a few weeks ago, and I had to name names and dates, in order to get the credit that I was due. For me, taking credit for my own efforts is important to me, even if I will not profit from it financially in any way, in these later years. I did the work, made the breakthrough, and I don't like to be cut out of the credit. Is this so out of line?
Please remember everyone: There are 3 phases to an idea. 1. It doesn't exist (or won't work)
2. It exists (or works) but is not important. 3. Someone else claims to have invented it.
I just like to keep the record straight.
 
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