hemmm posting here would be great.
One question ... GU50 screen ... interesting solution ... any other details about that idea?
One question ... GU50 screen ... interesting solution ... any other details about that idea?
Thanks for your comment,
Actually i dont use that 250V Zener ,only for protect 2 grid from
high voltage in case 275V or more.
Andreas , can you suggested capacitor value ,I can test.
I test russian triode 6N8S and have good result
If somebody need Transformers I have some excellent SE transformers in this range for 45 Euros . pair 90 euros about 115$
2K5/8R 140mA 25W
weight 4.5 kg or 9.9 lbs
Freqency response: 10Hz-45KHz (-3db)
EI-core 108 Waasner M 111-35 N
Toroidal power transformer 300W sec 320V.07A : 6.3V5A :6.3V5A :40V 0.6A for 35 EURO or 44$
Regards
mario
Actually i dont use that 250V Zener ,only for protect 2 grid from
high voltage in case 275V or more.
Andreas , can you suggested capacitor value ,I can test.
I test russian triode 6N8S and have good result
If somebody need Transformers I have some excellent SE transformers in this range for 45 Euros . pair 90 euros about 115$
2K5/8R 140mA 25W
weight 4.5 kg or 9.9 lbs
Freqency response: 10Hz-45KHz (-3db)
EI-core 108 Waasner M 111-35 N
Toroidal power transformer 300W sec 320V.07A : 6.3V5A :6.3V5A :40V 0.6A for 35 EURO or 44$
Regards
mario
Hi Zen Mod,
In cooperation with
http://www.tubeaudiolab.co.yu/
http://www.trafomatic.com/
I produce some tube PP SE and power audio transformers.
price is franco Belgrade
regards mario
In cooperation with
http://www.tubeaudiolab.co.yu/
http://www.trafomatic.com/
I produce some tube PP SE and power audio transformers.
price is franco Belgrade
regards mario
what you think about this
GU50 Power Tube Amplifier for 6200 EUR or 7880$
- Titanium Base and LUNDAHL Output Transformers - Price: 6200 EUR
http://www.stinnovators.com/stiprod41.htm
I have offer for GU50 for 1.5$ from Sofia - Bulgaria
You Must Read This Before buy some Tube Amplifier
http://giaime.altervista.org/howtosell_eng.html
Thank you giaime
😀
regards mario
GU50 Power Tube Amplifier for 6200 EUR or 7880$
- Titanium Base and LUNDAHL Output Transformers - Price: 6200 EUR
http://www.stinnovators.com/stiprod41.htm
I have offer for GU50 for 1.5$ from Sofia - Bulgaria
You Must Read This Before buy some Tube Amplifier
http://giaime.altervista.org/howtosell_eng.html
Thank you giaime
😀
regards mario
Hi Mario.
Can you give me more imformation about the power transformer that used in GU50 in parallel.
Can i have some picture of OPT you want to sell?
Thanks
Can you give me more imformation about the power transformer that used in GU50 in parallel.
Can i have some picture of OPT you want to sell?
Thanks
dung0981 said:
power transformer is
Toroidal power transformer is 300Watts
Primary 220V ,
Secondary 320V.07A : 6.3V5A :6.3V5A :40V 0.6A
for 35 EURO or 44$
you can use if you have transformer 300-320V 0.5 A but you must have 2 * 6.3V and 4 A for filament
For GU50 you need 12.6V 0.8A - filament
40V is for bias or for PL519 (40V 0.3A) filament
GU50 in parallel need about 200 mA per chanal
I post photos of OPT soon.
regards
mario
Nicely LOOKING amp but ...I just hope... (considering the big bucks asked for that amp) that the design is up to the looks....
After looking at Marios amplifier "design" I am not sure it is...
simple Kids stuff selling for £££? Oh my...what is te world coming too....
After looking at Marios amplifier "design" I am not sure it is...
simple Kids stuff selling for £££? Oh my...what is te world coming too....
Nicely LOOKING amp but ...I just hope... (considering the big bucks asked for that amp) that the design is up to the looks....
After looking at Marios amplifier "design" I am not sure it is...
simple Kids stuff selling for £££? Oh my...what is te world coming too....
After looking at Marios amplifier "design" I am not sure it is...
simple Kids stuff selling for £££? Oh my...what is te world coming too....
Hi Zen Mod
Well Mario did represent a drawing of his own amplifier and also
mentioned that he work together with a Yugoslavian Manufacturer
of amplifiers before he represented a picture (and asked for opinions) about a very expensive amplifier made in Belgrad.
So I gave my opinion on that amplifier. Titanium isnt exactly what is needed to make a good amplifier, in the contrary, money is wasted onto something that contributes (at the most) only to good looks. Forgiv me, I am a old man and designed amplifiers for measuringeqippement in the range from 500Hz to 500kHz back in the 60th and I know from expirience that even a good amplifier
is kidstuff compared to designing a good broadband transformer
and a person really able to design a good transformer will have no problem designing a good amplifier.
But back to your question "did you mix up...", I propable did, forgiv me, I apologize. Marios transformer prices are reasonable if they are good, or lets say at least as good as Lundahls (remember Lundahl is located in Sweden wich has very high costs of workmanship, high taxes, high livingcosts)
And may I say, even Lundahl produces transformers that are badly compromised by using core sizes that where primilary designed to achieve low mass production costs, optimized for mainstransformers. Long magnetic pathlength (with comparable
small and squareshaped areas) would be a good start for a good wideband/low loss design. Is there any? Not that I know off, even expensive ones look like mainstranformers to me.
Multilayerwindings, interleaved, sure, but what about proximity effects, skindepth in said winding outlay (wich isnt the same than the skindepth in a wire surrounded only by his own field) not to mention ignorance toward dielectrical properties of the isolationmaterial....But gladly, we got pure silver, or at least OFC..
and high prizes...must be good? at least good enough to help
designers to spoil the advantages of a single ended transformer by either putting a airgap rigth into the middle of a coil or, even better, invent choke/capacitorcoupling just to reintroduce us to that lovely hysteresisinduced distortions of pushpulldesigns we wanted to get rid off in the first place...
No, in my humble opinion, neither tube amplifiers, nor transformers, even comparable cheap one,are worth the money asked for them...
The WWII LS50 is nostalgic to me, played with it s a kid, and the russian clone, the GU50 (at 1.50) is ok, but you get what its worth for 1.50, not less, not more...
So I repeat...Oh my, what is the world coming too...
Well Mario did represent a drawing of his own amplifier and also
mentioned that he work together with a Yugoslavian Manufacturer
of amplifiers before he represented a picture (and asked for opinions) about a very expensive amplifier made in Belgrad.
So I gave my opinion on that amplifier. Titanium isnt exactly what is needed to make a good amplifier, in the contrary, money is wasted onto something that contributes (at the most) only to good looks. Forgiv me, I am a old man and designed amplifiers for measuringeqippement in the range from 500Hz to 500kHz back in the 60th and I know from expirience that even a good amplifier
is kidstuff compared to designing a good broadband transformer
and a person really able to design a good transformer will have no problem designing a good amplifier.
But back to your question "did you mix up...", I propable did, forgiv me, I apologize. Marios transformer prices are reasonable if they are good, or lets say at least as good as Lundahls (remember Lundahl is located in Sweden wich has very high costs of workmanship, high taxes, high livingcosts)
And may I say, even Lundahl produces transformers that are badly compromised by using core sizes that where primilary designed to achieve low mass production costs, optimized for mainstransformers. Long magnetic pathlength (with comparable
small and squareshaped areas) would be a good start for a good wideband/low loss design. Is there any? Not that I know off, even expensive ones look like mainstranformers to me.
Multilayerwindings, interleaved, sure, but what about proximity effects, skindepth in said winding outlay (wich isnt the same than the skindepth in a wire surrounded only by his own field) not to mention ignorance toward dielectrical properties of the isolationmaterial....But gladly, we got pure silver, or at least OFC..
and high prizes...must be good? at least good enough to help
designers to spoil the advantages of a single ended transformer by either putting a airgap rigth into the middle of a coil or, even better, invent choke/capacitorcoupling just to reintroduce us to that lovely hysteresisinduced distortions of pushpulldesigns we wanted to get rid off in the first place...
No, in my humble opinion, neither tube amplifiers, nor transformers, even comparable cheap one,are worth the money asked for them...
The WWII LS50 is nostalgic to me, played with it s a kid, and the russian clone, the GU50 (at 1.50) is ok, but you get what its worth for 1.50, not less, not more...
So I repeat...Oh my, what is the world coming too...
gorgon53 said:
No.
$1.50 for very expensive in manufacturing tube does not mean that they are worse than mass production KT??, it means that they were used for powerful mobile military transmitters, but were too expensive for audio amps manufacturers, that's why they are not in demand, that's why they are so cheap.
