• The move to the new server is done. There are some software and database maintenance updates in process. This has us passing the hat around to help out. We appreciate any donations. Seriously, even a dollar helps. The payment page may be found here - https://www.audiokarma.org/support.html

"Fluxion NT-6, Can You Explain?"

Newjin

Newjin

Active Member
I have a switchable 845 /211 single ended A class Power monoblocks
18 watts @845
8 watts @ 211
Now my question is there is a toggle
Switch labeled cap and xfmr
After reading and reserching cap is couplings of the transformer and xfmr is just an acronym for transformer.

I'm confused
Maybe I'm way off could someone please explain why and what the benefits would be.
Cap sounds full and warmer while xfmr sounds a little thinner and not as warm.

Any elaboration on this would be great thanks guys
 

Attachments

  • 16092302474886195939856915502489.jpg
    16092302474886195939856915502489.jpg
    47.3 KB · Views: 94
Register to hide this ad
Interesting . . . what amp is this?

You often see amps that allow you to switch the outputs between pentode / ultralinear / triode but I've never seen one that changes the coupling between the driver and output stages between cap coupled and interstage transformer coupling, which is obviously what's going on here.
 
FlaCharlie said:
Interesting . . . what amp is this?

You often see amps that allow you to switch the outputs between pentode / ultralinear / triode but I've never seen one that changes the coupling between the driver and output stages between cap coupled and interstage transformer coupling, which is obviously what's going on here.
Click to expand...
Its a fluxion -nt6
The man that builds these is close to where I live and is amazing.
He has stuff on YouTube discussing his philosophy and builds.
I'm learning lots and things are starting to make sense but they haven't really all come together yet.
So just clarification on some things
 

Attachments

  • Screenshot_20201025-212436_Samsung Internet.jpg
    Screenshot_20201025-212436_Samsung Internet.jpg
    75.4 KB · Views: 110
  • 20201214_115711.jpg
    20201214_115711.jpg
    77.1 KB · Views: 111
  • 20201214_115635.jpg
    20201214_115635.jpg
    77 KB · Views: 106
FlaCharlie said:
Interesting . . . what amp is this?

You often see amps that allow you to switch the outputs between pentode / ultralinear / triode but I've never seen one that changes the coupling between the driver and output stages between cap coupled and interstage transformer coupling, which is obviously what's going on here.
Click to expand...

he explained it as input signal can be coupled with 1:1 input transformer not sure what that means
 
FlaCharlie said:
Looks like a very well built amp. You'd probably need to see a schematic to tell exactly what's going on.
Click to expand...
Thanks just read about the trade off of coupling transformers and as much info as there is out there most happens to fall under scrutiny as there is so much subjectivity on the latter of information be it sonic reading or design purpose, trad off from choosing what build to go with .

Subjective is this hobby in a nutshell
And its confusing as all hell lol
Thanks for the responses fellas
 
In his YT vid
it is explained.
The Input has aswel as the standard Capacitor also an input transformer. so basicly it is an A B switch for 2 different types of input.
The standard wil be the Cap input.
But if you have some very, very VERY low output impedance from your preamp You could choose to use the Transformer option. In that case your experience will be turn arround 180 degrees.. and the transformer wil sound warmer.

SO basicly it is the jack of al impendance trades switch. :)


Indeed a very nice build amp
 
VintageDutch said:
In his YT vid
it is explained.
The Input has aswel as the standard Capacitor also an input transformer. so basicly it is an A B switch for 2 different types of input.
The standard wil be the Cap input.
But if you have some very, very VERY low output impedance from your preamp You could choose to use the Transformer option. In that case your experience will be turn arround 180 degrees.. and the transformer wil sound warmer.

SO basicly it is the jack of al impendance trades switch. :)


Indeed a very nice build amp
Click to expand...
Thanks its starting to make much more sense.
I have watched all his video pertaining to this said model and took all the notes just sometimes I need a little further breakdown of what certain things are and do as I'm not there yet with the terminologies and acronyms.
you guys are indispensable to me and I have learned so much.
Anything I dont understand I research first to try to get a grasp before chiming in here.
Again thanks
 
From the add posted above it looks like the builder is about 20 minutes away from me. How do you contact him? I'd like to see what the cost is.
 
ok so its not an interstage driver transformer, but it sits between the input jack and the first tube. 1:1 isolation transformers are sometimes used to break ground loops and stuff like that. Nothing really radical there, but as with all things the quality of the transformer will affect what comes out the other end of it.
 
Yeah, lots of amps (perhaps most) have neither a cap nor a transformer on the input. Input transformers don't seem to be common at all.

As I understand it, the cap keeps any unwanted DC from the source out. I've been using caps in my recent builds not only for that purpose but, if I use a battery on the grid of the input tube for bias, it also works the other way to keep the DC away from the source.

I assume an input transformer also does this? The two options probably also present a different load to the preamp / source, correct?
 
gadget73 said:
ok so its not an interstage driver transformer, but it sits between the input jack and the first tube. 1:1 isolation transformers are sometimes used to break ground loops and stuff like that. Nothing really radical there, but as with all things the quality of the transformer will affect what comes out the other end of it.
Click to expand...
He makes his own transformers for his builds so all vary specific to each build.
 
FlaCharlie said:
I assume an input transformer also does this? The two options probably also present a different load to the preamp / source, correct?
Click to expand...

yep, no DC path. Advantage to a trafo, depending how exactly its wired, is neither the + or the - have a direct connection between the amp and preamp. No chance for a ground loop. With a cap the - side remains connected most of the time, and only the DC path on the + side is broken. If the - is carried through on the trafo side too, then there really isn't any obvious advantage.

Load is basically the same too. 1:1 transformer would basically "see" whatever the grid resistor is and reflect that to the preamp.
 
gadget73 said:
yep, no DC path. Advantage to a trafo, depending how exactly its wired, is neither the + or the - have a direct connection between the amp and preamp. No chance for a ground loop. With a cap the - side remains connected most of the time, and only the DC path on the + side is broken. If the - is carried through on the trafo side too, then there really isn't any obvious advantage.

Load is basically the same too. 1:1 transformer would basically "see" whatever the grid resistor is and reflect that to the preamp.
Click to expand...
Thanks for taking the time but where the conversation has gone is too far over my head but its gives me more things to add to my notes of understanding.
 
I'm looking for someone to bench test a couple builds so I can finally know the truth. I will email him and see if, for a fee, he'd hook them into his rig and give me the specs.

I was looking at a few of his builds and the price to buy his 300B amp is cheaper than what I would pay in parts. I suspect winding your own transformers save you a fortune. Looks like a pretty cool guy.
 
JohnT123 said:
I'm looking for someone to bench test a couple builds so I can finally know the truth. I will email him and see if, for a fee, he'd hook them into his rig and give me the specs.

I was looking at a few of his builds and the price to buy his 300B amp is cheaper than what I would pay in parts. I suspect winding your own transformers save you a fortune. Looks like a pretty cool guy.
Click to expand...
Mr young is a super good man has and exceptional electronic engineer.
He has been doing this for a long time perfecting his art.
You can't go wrong with any of his builds something for everyone.
I've been pushing him as a builder to all my friends and support him and his creations.
No to mention his prices are vary hard to beat at the quality level he is putting out.
It would be a great place to start.

Good luck man I hope he does it for you.
Youngs builds and lifetime warranty are out of this world. I love my piece personally it does everything I want and need more .845 pre amp being built as we speak should be done in a week.
He has a video of the of it on his channel
Nt-5 to match the nt-6 power amplifier
Both are the #0001 So I feel super privileged own such pieces from such a builder.
 
Last edited:
You must log in or register to reply here.
Back
Top Bottom