My Take on Threshold NS10

[Zen Mod]

Re: +/-12V supply?

I could use a +/-12V SLA power source for the NS10 linestage, instead that the suggested +/-25V.
Do you see any necessary mods (component value), or problem involved?
Thanks,
Gianluca

1.what is SLA?
2.just go and try- you'll have less headroom and maybe not enough drive for your next stage,depending what this stage is.....

I think that you can go without changes

btw-try to search through thread for my post,where I say something about NS10 working with low voltage (after powering off )......
I don't remember exactly what I wrote,but I'm sure that voltage is scary low....

 

[Zen Mod]

not exactly on topic but.........

My friend Oly is one big (like he like to say ) "Grand Pa Borbelly's" follower ...hehe
his newest "Borbelly influenced" analog stage for sheeeetyyyyyy CD players,usefull also as line stage.....
just a oic for now,I'll try to convince him to share schmtc too.....

 

[Zen Mod]

Oly is generous,but still lazy with tubes.......
poor fellow

 

[Zen Mod]

now I look to my self as Destroyer X,with his overwhelming energy for friends and friendship...... :
here is Oly,at bottom of this page:
http://choky.on.neobee.net/My_BOZ.html

 

[BrianDonegan]

Resemblence?

Here is Oly the cat near Devil's Tower.

 

[BrianDonegan]

or

 

[gene57]

SLA = Sealed Lead Acid (battery)

Thanks for your suggestions, choky.

Gianluca

 

[steenoe]

here is Oly,

Wow, thats a nice looking friend you have there, Choky!! Seems like a very kind type of guy
His schematics looks just as nice I just love that Borbely kind of stuff My solder iron feels like firing up

Steen

Edit: shoot me a pdf of that board and I will give it a shot Pretty nice indeed

 

[Zen Mod]

humble request to mods

I think that this OT Borbely style stage deserves his own thread;
can you move posts 422,423,424,425,426 and 428 to Solid State with
"Oly's Borbely OP stage" as subject ?

or I'll just copy'n'paste in new thread with my self....?
TIA

 

[apassgear]

Wow, thats a nice looking friend you have there, Choky!! Seems like a very kind type of guy
His schematics looks just as nice I just love that Borbely kind of stuff My solder iron feels like firing up

Steen

Edit: shoot me a pdf of that board and I will give it a shot Pretty nice indeed

Hey Steen, you never seem to sleep…

Beautiful link Choky, nice guy and schematics. How come he does a series reg?

 

[steenoe]

Ynd how would you estimate combination of Zen v4 and NS compared to other preamps you've tried with?

Hi Stabist I just read through this wonderfull thread and think I missed your question Well I actually did compare the preamps with a ZenV4! Well, I have used my BoZ and my BosoZ and the X-CC-CCS-BosoZ as well as the NS10! Let me tell you, they all sounds great The BoZ family is a bit more romantic sounding than the NS10 I totally agree with Choky on that! The NS10 is pretty brutal as Choky stated! I like the X'ed BosoZ best But I guess thats a matter of taste, in the end I might add that the NS10 is way more powerfull than one would expect from a small transistor circuit like that It drives the Zen and the F2 with ease

Steen

 

[steenoe]

Hey Steen, you never seem to sleep…

Oh, I get my share of sleep allright (I guess )
Choky, if you start a new thread on that thing, please link us up from here

Steen

 

[Zen Mod]

Beautiful link Choky, nice guy and schematics. How come he does a series reg?

I think that he have some practicall problems with "missing voltage " inside of some shhhhheeeettty CD player,where he put that stage as finall output; something like 2x15V is available ,so solution was to use what you have ,with generic series regs (317 and 337) ,with something
higher Iq through Jfets,just to compensate....

now we do something together as "dedicated muscular series-shunt reg"......or something like that.....

I always have place (read-another case,if I want) and tooboollar approach,and Oly is somewhat more realistic than I;we'll see what we will make at the end

 

[Zen Mod]

Oh, I get my share of sleep allright (I guess )
Choky, if you start a new thread on that thing, please link us up from here

Steen

yup;
in any case,I'll make one little page on my www for this ( and maybe few others ) Oly's creation(s)

 

[steenoe]

Just took a closer look at that OP board I have to admit that I love the looks of it All the transistors are thermally coupled together and the overall appearance is just great Wonderfull work indeed

Steen

 

[Zen Mod]

steen-go to sleep
hehe-it's 4:27 ,at least for me........
zzzzzzzzzzz

 

[Zen Mod]

new thread

http://www.diyaudio.com/forums/showthread.php?postid=830852#post830852

 

[jh6you]

Hi, Choky

I have a great interest in your psu of BOZ, and I am thinking to reinforce my BOSOZ with a similar psu, which is a zener follower + source follower.

How do you and your tube friend Oly see this? Any advice? Tks.

Regards
jh

 

[Zen Mod]

Hi, Choky

I have a great interest in your psu of BOZ, and I am thinking to reinforce my BOSOZ with a similar psu, which is a zener follower + source follower.

How do you and your tube friend Oly see this? Any advice? Tks.

Regards
jh

you mixed things twice

tube friend am I,and Oly is SS friend

it's better to use exact copy of my (Oly's) BOZ reg,just because first BJT is also current source for zenner string.....less noise and overall better results

anyway-your version seems functionall ,too .....

 

[jh6you]

I am confused again - my bad habit.

Thanks for the reply, tube man Choky, and I believe yours must be good.

I was thinking to use NPN transistor and other components already in a junction box . . .

And, I was thinking that the arrangement of a zener regulation combined with an emitter follower will reduce zenner resistance, i.e. due to Rz/beta, so to reduce the ripple in a better way . . . In addition, the following source followers will purify the output voltage once again . . .

Could you give me a hint how yours reduces the noise?

Regards
jh