• 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.

Super cheap triode amplifier

Friends

This amplifier have a excellent sound, close to a fine 45 amplifier.
The power is small, about 2 to 3W, but the definition is very good.
The amplifier use a E180F( or 6J9P) tube as voltage amplifier, in triode mode.
The gain is good for excite direct the output tube.
The output tube is the cheap and forgotten 6W6GT , the 12W6GT or the more expensive 6Y6G in triode mode.
The circuit have two switches:the CH1 select the filament voltage and the CH2 select the output tube type.
The output tubes run with high plate disspations, 15W(6W6GT, 12W6GT) and 14W(6Y6G) and high voltages, and this tubes sound fine with this hot bias.
The tubes support this bias and because it is very cheap, this do not is a problem.
I love this amplifier, the sound is excepcional and surpasses many expensive comercial amplifiers. I play my full ranges with it, and I am very happy with the results.

Aldovan
 

Attachments

  • E180F_6W6GT_ 12W6GT_6Y6G_modo_triodo.jpg
    E180F_6W6GT_ 12W6GT_6Y6G_modo_triodo.jpg
    63.3 KB · Views: 3,226
Thanks, Aldovan.

What's the purpose of the 6CD3 tube?

John

John

The 6CD3 tube is used for a soft start only.
If you do not have this tube, can use rthe diode bridge only for the rectification.
But without the 6CD# tubes the voltage is a few high and can be necessary a adjust.
The 6CD3 tube is used for a "tubey" rectification efect, too.

Aldovan
 
Portugal

Ola Aldovan !
My freguesia is GUIA ,near Albufeira , where you can eat the best CHICKEN PIRIPIRI in the world !
Abraco
Silvino

Silvino

In the next year I will go to Portugal, I have parents in Ribeirinha, next do Torre Dona Chama...very nice region of Portugal.
My e-mail is [email protected], write me and I can speak about the amplifier.

Aldovan
 
Silvino

In the next year I will go to Portugal, I have parents in Ribeirinha, next do Torre Dona Chama...very nice region of Portugal.
My e-mail is [email protected] br, write me and I can speak about the amplifier.

Aldovan
I dont know that place ,wich city is nearby?E NO CENTRO OU SUL?
bUT COME AND WE CAN SPEACK AND MAYBE EAT A CHICKEN PIRIPIRI AND A NICE BOTTLE OF NICE WINE,AND MAYBE YOU CAN BRING SOME TUBES FOR ME THAT I CAN NOT FIND HERE!
tv SWEEP TUBES ARE CHEAP IN THERE?
Um abraco
Silvino
 
Very good

I dont know that place ,wich city is nearby?E NO CENTRO OU SUL?
bUT COME AND WE CAN SPEACK AND MAYBE EAT A CHICKEN PIRIPIRI AND A NICE BOTTLE OF NICE WINE,AND MAYBE YOU CAN BRING SOME TUBES FOR ME THAT I CAN NOT FIND HERE!
tv SWEEP TUBES ARE CHEAP IN THERE?
Um abraco
Silvino


Silvino

My parents live in a "vila" next do Bragança city.
My tubes I get from USA, because is very cheap and here in Brazil do not is cheap and easy to find.

Abraços,

Aldovan
 
The sound of the 6W6GT is excellent

great ideawith 6W6GT, truly an underestimated tube!
As is the 6S4, if you might want to try a real triode instead of 6W6GT, 6S4 usually comes cheap.
(i got a handful of 6W6GT and was thinking of PSE someday...)

Why spend money on expensive chinese tubes ?
With 6W6GT you have a better sound quality than the Chinese tubes for only a feaw dollars!!! The plates of the 6W6GT are balck and well sized, as were the valves in the U.S. end of the 50s. Nowadays we do not manufacture more valves with this quality. What is sold today is a beautiful product, but not as durable.
My Shuguang 300B are stored !
I'll make a lamp with them ...