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Old 2nd December 2010, 04:13 PM   #1
aldovan is offline aldovan  Brazil
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Talking 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
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Old 2nd December 2010, 07:28 PM   #2
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Very nice.
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Old 2nd December 2010, 08:56 PM   #3
el156 is offline el156  Portugal
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Hi Aldovan ! Looks very simple.i dont know if there is an european equivalent to 6W6GT. And the mains in Brazil is 127 volts? i didnt know that,here we have 230v.
Um abraco
Cheers
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Old 2nd December 2010, 09:42 PM   #4
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Thanks, Aldovan.

What's the purpose of the 6CD3 tube?

John
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Old 2nd December 2010, 09:52 PM   #5
aldovan is offline aldovan  Brazil
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Quote:
Originally Posted by VictoriaGuy View Post
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
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Old 2nd December 2010, 10:02 PM   #6
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Thanks, Aldovan.

I'll have a look in my tube collection to see what I have......
;-)

John
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Old 3rd December 2010, 02:21 AM   #7
aldovan is offline aldovan  Brazil
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Default Voltage

Quote:
Originally Posted by el156 View Post
Hi Aldovan ! Looks very simple.i dont know if there is an european equivalent to 6W6GT. And the mains in Brazil is 127 volts? i didnt know that,here we have 230v.
Um abraco
Cheers
In the reality the voltage here is 120V and 220V.
What is your freguesia ?

Abraços,

Aldovan
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Old 3rd December 2010, 06:36 PM   #8
el156 is offline el156  Portugal
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Quote:
Originally Posted by aldovan View Post
In the reality the voltage here is 120V and 220V.
What is your freguesia ?

Abraços,

Aldovan
Ola Aldovan !
My freguesia is GUIA ,near Albufeira , where you can eat the best CHICKEN PIRIPIRI in the world !
Abraco
Silvino
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Old 3rd December 2010, 07:31 PM   #9
aldovan is offline aldovan  Brazil
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Quote:
Originally Posted by el156 View Post
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 aldovanr@yahoo.com.br, write me and I can speak about the amplifier.

Aldovan
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Old 3rd December 2010, 08:04 PM   #10
el156 is offline el156  Portugal
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Quote:
Originally Posted by aldovan View Post
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 aldovanr@yahoo.com. 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
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