845 Valve - Chinese Conspiracy

hi siva,

did you try be3amplifier the website manek found? but aren't there any other alternatives to the shuguang or were they just too good for the money?

regards

Hi Siva,

It's true. Shuguang has stopped production of the 845 and 211. It seems they've run out of parts - the thoriated tungsten filaments - and are unwilling to invest since it's a low production valve for them. Their retailer, Super TNT, is trying to raise funds. How long that takes, nobody knows.

Just when I was starting work on the 845 SET too! And I was banking on the Shuguang valves.

Viren

Aint there LOTS ands LOTS of valves that used Thoriated Tungsten filaments ?

Hence there should be a market for these filaments ... ?

Why the stop on 845 only ?

Amp_Nut schrieb:

Aint there LOTS ands LOTS of valves that used Thoriated Tungsten filaments ? Hence there should be a market for these filaments ... ? Why the stop on 845 only ?

That's the consipracy part !!

I think it is aimed @ increasing the price of these beauties.

Raising prices......couldn't they have just done thast quietly anyways ?

Manek

I guess there will be a mad rush now for these...
The chinese are masters in the art of deceptive market tactics.

:-)

I guess siva and viren will just have to make that mad rush and get a pair each.

Lovely tubes though.

So are there not other tubes like the 845 which were used industrially which may be good for audio ? Eg 6sn7 was made for tv tube circuits and then adopted for preamps....any other power tubes show as good a potential as 845 ?

Manek

Eerr,

I have 8 stock packed RCA 845s. Hohohoho.

deaf.

Hi Deaf,

You lucky guy!

That doesn't really help us commercial guys. We have to base our products on continuously available stock.

Oh well, I hope the Shuguang people resolve their problems soon.

Viren

Manek,

No substitutes for the 845! It's a unique valve.

Of course, other valves can be used to make as powerful an amp. But it will be a different sound.

Viren

Viren
Agreed 845 is one of a kind and is a phenominal tube.

Agreed that the other power tubes will sound different. But now that this chinese company has done this isn't it time someone explored those other tubes and different sounds ? If this is indeed a conspiracy then they will do it again. Who knows that different sound may get accepted ? Btw Any tubes you know of that are not too popular in audio and good and easier to procure and more economical to implement ?

For acedemic interest....
Btw I was reading somewhere that a single power tube of a certain kind today can pump out 1.5mw of power(radio station transmission) but a single solid state device today can max 1kw. Is that true ?

Manek

Manek schrieb:

Btw I was reading somewhere that a single power tube of a certain kind today can pump out 1.5mw of power(radio station transmission) ... Manek

manek did you mean Mega Watt ?

deaf schrieb:

Eerr, I have 8 stock packed RCA 845s. Hohohoho. deaf.

I'm going to hire the under-world folks...and get those tube

...i only need to know where to start. Can someone help.

Manek schrieb:

Viren For acedemic interest.... Btw I was reading somewhere that a single power tube of a certain kind today can pump out 1.5mw of power(radio station transmission) but a single solid state device today can max 1kw. Is that true ? Manek

It is best kept academic

viren schrieb:

Manek, No substitutes for the 845! It's a unique valve. Of course, other valves can be used to make as powerful an amp. But it will be a different sound. Viren

Aah...I am curious...whats so special about the 845 apart from the power factor ? I have heard the Canasya and Siva's 845 based amp. But still I am not sure how they are special tonally. Why other power tubes are treated skeptically ? Just a curious questio..nothing else.

sivat schrieb:

...i only need to know where to start. Can someone help.

Batman costume, rubber shoes. In Deaf’s back yard at night, that is where u should start

square_wave schrieb:

sivat schrieb: ...i only need to know where to start. Can someone help. Batman costume, rubber shoes. In Deaf’s back yard at night, that is where u should start :D

To me it sound like a JOKER stunt rather than Batman. Any ways I have been trying to work on a source, where I am trying to aquire at least 100 RCA 845 tubes.
When it happens, you will see me in a cape with bat ears too.
Deaf.

Yes arj I meant one megawatt, atleast that's what one of those pages from google said :-)

Siva, I do get your point :-)


Now to help others plan the heist of the 845's from deaf.......do we do it the butch and sundance way or Bony and clyde or the matahari way ?


Manek

Abhi,

Well, the 845 is one of a class of directly heated triodes - a class that has very low distortion. And the 845 has been adapted very well for the lower frequencies of audio.

The valve is not the full story though. How well it's used in a design, and the implementation of it, determine whether the valve shows its full potential. It was designed for single-ended use - maybe it sounds best that way!

Viren

Abhi Pani said

Aah...I am curious...whats so special about the 845 apart from the power factor ? I have heard the Canasya and Siva's 845 based amp. But still I am not sure how they are special tonally. Why other power tubes are treated skeptically ? Just a curious questio..nothing else.

Each Valve type has its own aural signature, much like Op Amps. ( Ofcourse this ass-u-me-s that the circuit is properly implemented ). Same applies, I guess to speaker categories like Horns, etc.. or amp manufacturers house sounds ...

As a result, you will see Valve fans polarised towards their Favourite tube.

I was not aware of this development. Per reports Shuguang 845’s were getting better by the day.

I have visited Super TNT in Changsha city. Mr. Luo is a genuine tube lover and at the same time an astute businessman. Typically Chinese. I bought from him a pair of 845 and 300B. Both test and sound pretty good. Shuguang 845 is very similar in construction to the Amprex 845. Attaching pic.



The same pair of 845 tubes on test at another Chinese audio legend Mr Liang. Mr. Liang's Audio make superb tube amps and I always visit his workshop whenever in Wuhan.