???
I posted a link Owedo. I did not author the original thread and in fact expressed amazement at the claims at the time.
I did not mention the brand either in the posts above, if that makes you feel any better.
As I pointed out, before putting the link up, I may have gotten the nuvistor and tube thing mixed up.
Why are you so upset about this? It's only hi- fi. It's supposed to be about having fun etc.
Have a cup of tea, relax man.
I posted a link Owedo. I did not author the original thread and in fact expressed amazement at the claims at the time.
I did not mention the brand either in the posts above, if that makes you feel any better.
As I pointed out, before putting the link up, I may have gotten the nuvistor and tube thing mixed up.
Why are you so upset about this? It's only hi- fi. It's supposed to be about having fun etc.
Have a cup of tea, relax man.
Exactly, I rest my case: rumour and innuendo - drivel.
I'm upset about your bull****, not hifi 😛
It's about having either a 5 minute or the full 30 minute argument actually 🙂
????
Owedo, I did not author the original thread and in fact expressed amazement at the claims made it it.
If it makes you feel any better, I did not mention the brand nsme in my posts above either.
Hi- Fi is supposed to be fun, so I do not understand why you are so upset abou this.
Have a cup of tea. Relax man.
Owedo, I did not author the original thread and in fact expressed amazement at the claims made it it.
If it makes you feel any better, I did not mention the brand nsme in my posts above either.
Hi- Fi is supposed to be fun, so I do not understand why you are so upset abou this.
Have a cup of tea. Relax man.
Maybe I'm just stoopid, but how is that tube filament getting enough current to get hot? And if it's not, how is the tube passing any signal at all?
Mike
Hard to tell without resistor values. But why do you foresee a problem? Same CCS feeding the mosfet is feeding the heaters, maybe a cheapskate solution but it works.
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Yeah. I see it now (face palm) 😱
I've been doing battle with a nasty cold virus so I've been sleep deprived all week, my little brain probably isn't functioning at it's best.
That's my story and I'm stickin' to it. 😛
Mike
I'm confused now. A Nuvistor IS a tube. It's small and metal jacketed, but it's a thermionic tube/valve.
I must admit, I was really looking forward to this thread turning into something interesting, but it is so off topic it is saddening 🙁. What have I learned from this GNfB thread, absolutely, nothing I'm afraid, well besides a Hypex Ncore amplifier :/. Not a lot of open minds, a few but only a few,just seems to be a rehash of the textbooks on gnfb. So I'll draw my own conclusion here, gnfb is a balance, no free lunch, a huge benefit for audio?, only your ears can decide, there are many sonic duds that use gnfb, so I'd say used at face value it's not a huge benefit at all :/
Colin
Colin
Yes, you are correct - they are both tubes as you know SY. I believe we differentiated between a standard glass jacketed tube and the metal enclosed nuvistor in the context of this specific thread after the detail became clear in the link I posted.
Clearly Owedo has some ax to grind on this whole thing. I have never been called a bs'er, so I am into new territory personally. At least I am not an MF brown noser. LOL
Well, if a metal jacket is the criterion, 6SJ7, some 6L6, 1614, C3g, and many other tubes don't qualify.
There are learned text books with complicated math that explain exactly how GNFB works, it's benefits, and how to apply it effectively etc. There are thousands of control theory practitioners around the planet that have studied and applied the science. Then you have a small boutique industry where a certain segment say it does not work as advertised, it causes problems with the sound (read: system output) that somehow magically escapes measurement with all known tools and methodologies. These same people then also refuse to accept DBT as a valid test methodology.
What kind of discussion did you want under these circumstances?
Member
Joined 2009
Paid Member
I apologize for adding further OT to this thread but I feel uncomfortable about your comments regarding Owedo here.
Ithink Owedo was upset for good reason and your now calling him a 'brown nose' (by implication) appears to me as unfair - you took some information from the internet at close to face value and ran with it. The result cast somebody else (MF) in a very poor light indeed and you added your own anecdote about knobs coming off. With nobody here from MF to 'defend' themselves it came across as a one-sided attack on MF even if this wasn't intended. And it turned out not to be accurate.
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Nonsense.
If anything I would expect a full apology from Owedo.
Don't accuse people of bring bs'ers when they simply report what was stated elsewhere. Further,I repeat: I already acknowledged I mixed up glass tubes with Nuvistors. So what?
I am failing see where all this defending of the said company is coming from and the faux indignity being expressed here. Next week, it will be some other brand.
Do you think the posters on the thread I linked to were lying as well because that's what you are also implying here? If so, take it up with them.
Knobs falling an MF product in Tokyo is my personal experience.
This matter is closed as far as I am concerned.
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I think you need the cuppa today!
There is still no evidence of which model supposedly had an inactive valve in it. There were all SS and all tube products being made at that time. no hybrids. That is accepted. So it remains unsubstantiated dirt from a disgruntled ex employee.
Substantiated is the on the limit thermal design and cheapskating on capacitor ratings in the 80s. 30 years ago. And that in this century the factory that assembles them somewhere in your timezone can't tighten knobs up.
Remember that you said
So far only one source cited which lacks the information to be credible. Where are the others. And what was the product? You laid into them fairly hard there with what appears on inspection nothing more than 'bloke in the pub'.
Was Jez lying? Dunno, but he was clearly carrying a huge chip on his shoulder. He has hopefully gone onto better things.
There is still no evidence of which model supposedly had an inactive valve in it. There were all SS and all tube products being made at that time. no hybrids. That is accepted. So it remains unsubstantiated dirt from a disgruntled ex employee.
Substantiated is the on the limit thermal design and cheapskating on capacitor ratings in the 80s. 30 years ago. And that in this century the factory that assembles them somewhere in your timezone can't tighten knobs up.
Remember that you said
So far only one source cited which lacks the information to be credible. Where are the others. And what was the product? You laid into them fairly hard there with what appears on inspection nothing more than 'bloke in the pub'.
Was Jez lying? Dunno, but he was clearly carrying a huge chip on his shoulder. He has hopefully gone onto better things.
Well Abraxalio, you could start by explaining to us what it is about feedback that we can't measure or don't understand. Some of us are quite happy with the way it works.
Take it up with Jez if you don't think his comments were truthful. However, you were'nt there as far as I can tell, so I have no reason to believe your view over his. Who are you to say the source 'lacks the information to be credible'
Very interesting article by D.H. Cheever ,one our member just uploaded this one on the our Tubes sub-forum ,
http://dancheever.com/main/cheever_thesis_final.pdf
http://dancheever.com/main/cheever_thesis_final.pdf