[Niteshade]

The 6N7 looks to be a great tube for making a mid-power push pull triode amplifier. Nothing much is said about it. The plate to plate resistance is only 5K, so a wide variety of OPT's can be used. It would even make a nifty SET amp! 

[Jon L]

*Edit* Never mind my post.  My eyes must be failing me b/c I could have sworn I read "6SN7"

6SN7 is the last tube I would want to see in power output stage.  Have you seen the crazy 6SN7 prices these days?  Knowing audiofools, people will be using octets of TungSol roundplates or Sylvania metal bases in the output stage, and *retubing* them every year or two 

A more worthy cause would be to find and use some cheap-as-dirt but great-sounding tubes for power stage IMO..

[Niteshade]

It's a 6N7, not a 6SN7. There's a big difference between the two.

6SN7 is the last tube I would want to see in power output stage.  Have you seen the crazy 6SN7 prices these days?  Knowing audiofools, people will be using octets of TungSol roundplates or Sylvania metal bases in the output stage, and *retubing* them every year or two 

A more worthy cause would be to find and use some cheap-as-dirt but great-sounding tubes for power stage IMO..

[ZLS]

The 6N7 looks to be a great tube for making a mid-power push pull triode amplifier. Nothing much is said about it. The plate to plate resistance is only 5K, so a wide variety of OPT's can be used. It would even make a nifty SET amp! 

    Why isn't it used more often? 

[Niteshade]

I would like to know why it isn't used more often too. Has anybody used it themselves?

[ZLS]

I would like to know why it isn't used more often too. Has anybody used it themselves?

    Let me rephrase my question; why is the 6N7 Triode Power Tube preferable to the 845 Tube? 

[Niteshade]

The 845 is a fine tube and so is the 572B. A 6N7 is a dual triode rated for 10 watts anode dissipation and is the size of a 6V6. I plan on building a 6N7 based amp soon and will  be able to tell you more after it's finished. Does anyone have some experience with this tube other than in a phase splitter or preamp circuit?

[JoshK]

Not familiar with the 6N7.  Its got pretty low anode dissipation, so it makes for a nice lower power application.  For lower power apps, 6V6 and EL84 are the popular tubes.  Its a lot like any other tube.  Within a use, audiophiles gravitate towards what is commonly used.

There are lots of great options that are cheaper and easy to get them NOS 6v6 and EL84's. 

[f2a]

Hi
Before the designer used the 6n7 to drive power tube like this schematic .( like 6sn7 ) but  It really are not   an electrical equivalent to the 6SN7GT, because of its high mu 35 and ....

[andrewbee]

6N7 or 6SN7?

6SN7 needs no further introduction. 6N7 is a dual triode with shared cathode. Its designed as a class B driver, good for ~10w. I was just looking at it last week.

[f2a]

 

6N7 or 6SN7?

6SN7 needs no further introduction. 6N7 is a dual triode with shared cathode. Its designed as a class B driver, good for ~10w. I was just looking at it last week.

I think the 6n6 can working in 10 w class b (fixed bias)

[Niteshade]

I think it would be a great tube for inexpensive, medium-power triode amps either in a push pull or single ended circuit.

[Niteshade]

Out of curiosity,  what unique tubes have others used to make power amplifiers?

Gm70
Gu50
813
829b

and so on....

What about the F2A? Terribly Expensive, but looks to be built like a tank! I will have some information on this tube soon, first hand. 

[JoshK]

I have a stash of 813's and GM70s.  At first I was going to make a 813 SET, but I may try the GM70 first.  I want to try the 3C24 as the driver (Boat Anchor Club; Jim Dowdy's inspiration).   This is pretty high voltage territory as my B+ is ~900-1050vdc.  Had to read up on the insulation requirements needed for the PSU iron....not easily off the shelf variety.   

The chokes I have are monstrous, 8H 550madc 6K wv (x2) and 6H 350madc 4k wv (x2).   Weigh 21lbs and 17lbs respectively.  Caps are Russian military surplus 100uf 1000vdc and 50uf 1000vdc. 

The others you mention are lower voltage types and don't require the same level of care and special parts (=costs).

[Audiovista]

I think the 6n6 can working in 10 w class b (fixed bias)

I agree. It would make a nice guitar amplifier. I have a small stash of 6N7's - wanted to make a Class A headphone amp... but it didn't make the top of the list....yet...

[JoshK]

I have a small stash of 6N7's - wanted to make a Class A headphone amp... but it didn't make the top of the list....yet...

I know that.  I have a growing list. 

[f2a]

I will have some information on this tube soon, first hand. 

My favorite tube    Dand  also my name .sounds too nice  king of midrange  and good drive in single ended .i love this German  made and I like to here news abut the f2a , thanks

[Audiovista]

I have a small stash of 6N7's - wanted to make a Class A headphone amp... but it didn't make the top of the list....yet...

I know that.  I have a growing list. 

Oh, there are too many tubes... we'll never get to try them all.... 

Josh - looks like GM-70 is the way to go.... should be fun.

[f2a]

I have too many hi fi  tube  in my home (f2a-vt25-811-2a3-6b4-211-813-807-6l6-el34-6v6-el33-…….) and I cant decide to which one  is better to  build  .

[JoshK]

That is what breadboard amps are for!