• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

50W super triodes and stuff

Well, this ended better than his last thread, where he cursed out the many people who had tried to help him, and stormed off to sulk. It was mercifully closed by the moderators. Things are improving.
Well, if you re-read that thread carefully you'll understand that I had to repeat myself constantly in an attempt to correct countless and repeated misunderstandings and I had to sit there and grin while I was being rudely mocked continuously. You better bet I stormed outta there.
Being misunderstood is my super power on this forum, and in life really. But it's particularly bad on this forum, I feel like I'm in the twilight zone.

A friendly but firm piece of advice.
If you ever want to be taken seriously, you remove all emotional content from your arguments,
Um, the only emotion I ever put into my posts is when I'm responding to people who are being a**holes, and even then most of the time I just grin and take it.
The one major issue I have with the people on this forum is the endless amount of emotion and ego. It gets in the way of practical progress and is so frustrating.
I just want to solve problems and learn. Not argue about who's right and wrong or whatever. I don't have an ego, I don't care who's right or wrong. I just want to discuss information and improve the technology.
I crave criticism, just not when people are being unhelpful jerks or continuously ignoring my words and making presumptuous accusations.

go to work to PROVE what you are capable of.
Yeah, I've been trying for years. I have particular circumstances that prevent me from easily escaping my situation. I've basically been riding the edge of homelessness for quite some time now, almost ended up on the street a few times this year. No this is not "emotion" and I don't want your pity. This is just me sharing context.

In any case can't find investors without something to show so I've been spending all my efforts trying to build something worth showing as I only get one shot.


you will follow the ideas using your last dime (or Eurocent), and the shirt off your back, to make something happen
Hahaha, that's basically what I'm doing man. I sacrificed 4 years of my life for this. Basically going nowhere, doing nothing, seeing no one, because I live out in the boonies and I have no transport and no money to get out except for work. I knew for quite some time that this endeavor would likely land me on the street. And you know what, I don't even care, I need something to strive for other than simply existing. My plans changed recently and I have to take care of some stuff that can't be ignored before I return to this though. At the start of next month I need to drop this hard for a while. I threw a few lines in the water and contacted some people to see if I can get my main project measured but I can't put proactive effort into it for the time being.
 
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Well, if you re-read that thread carefully ......

I sacrificed 4 years of my life for this. I knew for quite some time that this endeavor would likely land me on the street.
Learn the word PRAGMATISM or you will always fall over.
(which also means someone has probably done what you are doing before, but you don't know about it)

Re-read what you just wrote, and (if you can) imagine how embarrassed you might be in 1,2 or even 5 years to read what google has archived about you in the wayback machine...

Customers will find this stuff even if you forgot you wrote it....

Ie. before you write something (emotional whether you see it or not) put your brain in gear before your fingers hit the keyboard.

Nobody knows behind that screen there is a dog.

220px-Internet_dog.jpg


(written by someone, who deliberately manipulates forums in the past, to elicit reactions + select out & get shot of / find only customers I want to work with.)

We may prove the internet does not exist at all. :deerman:
 
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I dunno, I would think a 25W amp with "unmeasurable" distortion that can fit in your hand and costs a hundred or so bucks would also fall into the "eminently marketable" category.
But maybe I'm wrong there. I know the Magni and O2 amps have sold a ton and they literal toys in comparison despite being of similar size and cost.

I would agree that the headphones would be another option to get things kick started but I simply lack the funds to get them beyond an alpha stage of development. It could cost me thousands.
The amp is way further along, I only need one more prototype iteration, still a $700 expense but at least I get two amps for that.
 
I would agree that the headphones would be another option to get things kick started but I simply lack the funds to get them beyond an alpha stage of development. It could cost me thousands.

The amp is way further along, I only need one more prototype iteration, still a $700 expense but at least I get two amps for that.

Yes but thinks things through. PLS.

The chances of you selling a low distortion amp these days are just about ZERO.
(I wouldn't buy one, and you are up against the marketing PR monsters out there)...

The chances of selling an improved headphone are HUGE, because the offerings out there are just horrible, and STUDIOS and broadcast radios want them.
(I will buy one in the next 3 months but it will be ESL, as you don't have a product).

I explained this by PM, but you don't seem to have understood. ( yet )
 
he should never have used his real name

That's really a dumb answer.
You know data mining these days is something totally BANAL.

You can't imagine how easy it is to get IP address info, association between a product and the developer, it gets cloned and built in some back street of Shenzhen...in fact they are probably working on the subject of this thread already and making it work....

How you think the Chinese have already developed something before you can even say "bonjour"?

They also watch forums like this with great interest, because they aren't able to come up with ideas themselves....
Huawei is just the tip of the iceberg..

Time for a little bit of that naivety to vanish down the yellow river, or are you used to seeing the 1USD valves suddenly vanish and reappear in Taiwan or Hong Kong at 15x the price a few months later, then see your product appear on Aliexpress for 10USD by June this year ???

Tubelab will confirm! 😱

Hmm. Sharing contextual information doesn't seem like something to be embarrassed about. If that's the way people see it then that's a them problem.

Yes but people who want to develop YOUR product (and even steal it) watch what you write, say (OK the geezer hasn't a cent to his name, so we can steal it easy and he hasn't a chance of suing us), so they say he's weak ,- rip him off, and we'll make a fortune.

That's exactly how Zuckerberg did Facebook, and look where his is now..
.. how Microsoft shafted DEC (stole NT, and were half hearted sued for it by a company that was already weakening)....
I had a book stolen, and still struggle to sue for something as internationally simple as copyright....I could go on and on...
In England, they say possession is 90% of the law.
It sure is,- , (IP is almost impossible to protect),

so even IF, big IF, you are quicker to market, someone will always clone something and claim it's their own idea, OR you did nothing original!

Hey wake up!
 
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Is licencing an option? If you were able to create something that wraps all the work and testing you have done into something that can be presented, then maybe one of the mid-size top end hifi companies would licence your ISP?

To do that you have to be able to demonstrate the product, but keep the ISP secret - maybe put a prototype in a sealed box?

If you had a prototype and a portfolio of test results to make your claims justifiable, maybe crowd funding is an option?

It sounded like you had your back up against the wall for some reason, and also like there was a lot of information that you had lost sight of. Can you just regroup, and search for it all, and gather it altogether so that it is presentable?
 
You are so right, he should never have used his real name 😛
Real name? As far as I know my real name doesn't exist on the internet. Indeed google turns up nothing.

in fact they are probably working on the subject of this thread already and making it work....
Well it's a good thing I only posted schems of my throw away designs then isn't it.

Is licencing an option? If you were able to create something that wraps all the work and testing you have done into something that can be presented, then maybe one of the mid-size top end hifi companies would licence your ISP?

To do that you have to be able to demonstrate the product, but keep the ISP secret - maybe put a prototype in a sealed box?

If you had a prototype and a portfolio of test results to make your claims justifiable, maybe crowd funding is an option?

It sounded like you had your back up against the wall for some reason, and also like there was a lot of information that you had lost sight of. Can you just regroup, and search for it all, and gather it altogether so that it is presentable?
Making a presentable piece of equipment has been the core plan all along. It just takes a lot of time and money to get to that point. I'm almost there with my amp, but will be quite some time before I can get back to it again.
Not sure what you mean by "information". If you mean the test results of my amp then those results are irrelevant because if I a take screenshot of my analyzer in loopback mode then that will be the result every time anyway. Anything else is just extrapolative tests.
That's why I need a reputable third party to get involved so I can stop wasting my time.
 
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Whenever you post a somewhat sensitive schematic online, include some circuitry with a 6BN6 or 6H6 tube or such that looks like it does something, and label it BS control or similar. "Quantization modulator" Maybe the world supply of those tubes will head East with any luck. 😎
 
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I wouldn't worry too much there.
The PRC, HK and Taiwan, (& now India a late starter) has been so busy of late destroying the mountain of old Soviet NOS 6V6, 807 & the small hi gain "super triodes" they've struggled with the more obscure yankee TV stuff.

Latest in the hyping stakes have been any close relative of the NOS KT66 c/w PRC made "convertor-adaptors"...because GEC OEM ones are already 1000-1500US for a quad, and people have got wise to the PRC clone look alikes and clever fakes.

Basically any new tube amp on Aliexpress or the eletronics web sites is now stacked with soviet made stuff. presumably sent from here, down the trans-siberian from anywhere in Uzbekh, Ukraine, Moldovia, Russia where large stashes of them keep surfacing.

It's no more than 3 days on a train for them, which is why Chinese made IT tuff in Russia is cheaper then anywhere else in the world.

One thing that suprised me in the clothes stores in downtown Bejing was just how many languages they spoke, and especially how many spoke really good Russian for their weekend clients from Moscow.
 
I can tell you what it is in power amps.

A certain type of non linear compression, which varies subject to the following (non exhaustive list):-

1/ line stability (also exists in microphones)
2/ magnetic saturation characteristics (exists in tape heads also) - transformers.
3/ alignment of grids, especially secondary emission (particularly pentodes)
4/ cathode emission limits and aging, (matching of differing pairs)
5/ leakage inductance and stray capacitance in transformers
6/ quality control issues between different manufacturers NOS and Repro.
7/ Insulation issues between differing electrodes, inc DHTs.
8/ Oscillation phenomena which can be hard to detect...
9/ other parasitic phenoma inc shot noise & microphony
10/ specific behaviour under inductive and capacitive loads.

plenty more 🙂
May I add the in my view most important one, the interaction between the amp and the speaker (especially during the time when things turn around and the speaker becomes the generator)
 
in my view most important one, the interaction between the amp and the speaker (especially during the time when things turn around and the speaker becomes the generator)

I think this was tackled in the last thread, and we know how all that ended.

DF is almost totally irrelevant,-once above a certain value which why I didn't mention it.

My own amps were designed to drive shaker tables.
The day I see the speaker shaking my amp, I will start to believe this BS about damping and speaker EMF.
I reckon this so called "interraction" is one of the silliest and most over-rated theories to hit hifi, just like the old TID stuff was 30yrs ago,

..quite apart, from the fact on a good valve amp, the higher impedance end is at very high voltage (650V), and has current aplenty to back it all up.
 
You do know that a step-down transformer acts quite different from a step up transformer? So much about Df when the speaker is the generator feeding a step up transformer, those really weird phase-relations dont bother you?
 
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May I add the in my view most important one, the interaction between the amp and the speaker

DF is almost totally irrelevant,-once above a certain value which why I didn't mention it.

It may be true that the interaction is minimal when the DF is sufficiently high, as it MUST be for a shaker table amp. There is some observable interaction when the DF is in the low single digit range as common in SE tube amps without feedback.

I went too far down this rabbit hole about 15 years ago when I observed that the (properly scaled) voltage on the plate of the output tube does not match the voltage across the speaker at the instant a huge bass drum transient attempts to reverse the cone motion in a 15 inch woofer. The voltage and current at the speaker are nowhere near in phase either.