My Take on Threshold NS10

Status
Not open for further replies.
Jump to Latest
#383
George,

Actually I haven’t look closely to find a substitution for the MPSA18 since this transistor is easily found, cost pennies and is the suggested substitution by NP.

Most any low power NPN with high DC current gain and low noise will work there for Q1/Q3 but sound wise will be different so the suggestion of the MPSA18 stands.

I looked to the specs of BC devises and didn’t fine a direct substitution but you could try BC550C or BC547C which are closer than others and see if you like them soundwise. 🙂
 
#386
steenoe said:
Yep, I was😎 I suggested building a Threshold 400A amp to go with the NS10 more or less for fun. But the idea is getting very tempting😎
Thanks for the link, Allan.

Steen🙂
Click to expand...


steen
we have all seen how fast you are
Have made the pcb's yet😀

may need a new thread for the 400a?

I have not heard (listen too) the threshold gear.

Can anyone compare this preamp to the cc-ccs-x-bosoz or other
pre's

Or the 400a to a ksa50?

allan
 
#387
may need a new thread for the 400a?
Click to expand...
I am in😀
Can anyone compare this preamp to the cc-ccs-x-bosoz or other
Click to expand...
They both sound very good. I would rate the BosoZ (with all the suffix'es😉 ) As being the most musical. It has this very pleasant sound🙂 In any case, I intend to have a Twisted-BosoZ as preamp in the main system, but I could easily live with the NS10 clone🙂


Steen🙂
 
#388
thanks for the description steen
I like the bosoz (with all the suffix'es ) too, also main system.

I may try the NS10.
I like the simplicity of the design.

Problem is
easy to change the character of the sound by using different tranistors.
but to find the best to suit your own preferences.....?

allan
 
#389
awpagan said:
thanks for the description steen
I like the bosoz (with all the suffix'es ) too, also main system.

I may try the NS10.
I like the simplicity of the design.

Problem is
easy to change the character of the sound by using different tranistors.
but to find the best to suit your own preferences.....?

allan
Click to expand...
first:
you are deep enough in this hobby if you can hear diff between various transistors with your existing equipment;
second-why is this problem-just use sockets for transistors untill you find preffered combinations,then solder them permanently



:devilr:
 
#390
choky said:

first:
you are deep enough in this hobby if you can hear diff between various transistors with your existing equipment;
second-why is this problem-just use sockets for transistors untill you find preffered combinations,then solder them permanently



:devilr:
Click to expand...


my quote
"Problem is
easy to change the character of the sound by using different tranistors.
but to find the best to suit your own preferences.....?"

Maybe i phrased this not quite right?

ckoky, what i mean is that all transister parameters are not exactly the same, even between the same makes.
This should have an effect on the circuit.

Sockets, thougth about this, may try it still.

But wouldn't they add capacitance between the contacts? (socket and pin of component)

allan
 
#391
I wanted to use sockets to begin with. I didnt find them in time so I just soldered in the MPSA18's🙂 Dont really feel like taking them out again. I will try some other transistors though, just to see what happens, and for that I would prefer sockets and when testing is done the preferred part is soldered in. I dont think the small parasitic capacitances of the sockets is of big concern for testing purposes. Would be fun to put some J-fets in and see what happens🙂

Steen🙂
 
#392
awpagan said:



my quote
"Problem is
easy to change the character of the sound by using different transistors.
but to find the best to suit your own preferences.....?"

Maybe i phrased this not quite right?

ckoky, what i mean is that all transister parameters are not exactly the same, even between the same makes.
This should have an effect on the circuit.

Sockets, thougth about this, may try it still.

But wouldn't they add capacitance between the contacts? (socket and pin of component)

allan
Click to expand...


:clown:

my quote : "just use sockets for transistors until you find prefered combinations"

accent is on "until you find prefered"

in my gadgets (with muuucho less feedback than that overcomplicated and overpriced and over respected lousy NS10 preamp) every different tube origin can have slightly different sound-sometimes better ,sometimes not.

I'm not perfectionist ,but only when I achieve "good'nuff" level of SINGING ,not reproducing musical signal......

you know-its for fun
serious one,but still fun.....

after many (?) years some of my hardest maded devices are still good as in day zero,but now I have much different attitude

so , why not finish post with :clown:
 
#393
Embarrassment and Joy

Hello Folks,

I am overjoyed and yet hanging my head in embarrassment!

My NS10 works (single channel)... nice clean sine wave signals anyway: gotta rush down and plug in lots of loose wires into my Carlos FM chip amp set it up on a big piece of chip board and cover the workings with my wife's washing basket, (after I have hung out the clothes).

I now have a gain of 5.0!

The thing is, that, despite looking at those data sheets multiple times, I STILL got the transistors in back to front!!!!! Combine that with a dud transistor or two (where are these things made?????) and I got totally confused. What finally made me twig was time and writing the CBE onto the tips of my fingers, using my finger nails to represent the flat side of the TO92 package. I think I will use that technique a lot more now that my 3D capacities are obviously failing along with my eye-sight.

I guess then the other things are:
1. My circuit board works nicely and I think is kind of cute and yet versatile. Lots of room for different capacitor types and configurations, several input/output options (pins for the final installation, those little clamps for fiddling around), lots of possible grounding options.
2. Using "Machined Pin IC Socket Strips" e.g.Jaycar version
as the transistor mounts works nicely. If you have a lot of swaps to try, you could even solder the transistor legs into a set of three in a row and piggy-back them into the three mounted on your circuit board.

They could also be useful fine-tuning active crossovers.

Gotta go and reduce the gain on my chip-amp and play a single channel of Pink Floyd right now.

Thank-you all for your perseverance with a real dummy!

Regards,
George.
 
#395
Hello,
I do not want to hijack the thread, but I hope someone can point me in right direction. I am interested in building NS10 in its orginal configuration with single PSU. I found four threads about this preamp, schematic drown by Mr. Pass but with no part values. My electronic knowledge is rather basic, so I am unable to come up with my own circuit simulation. Was full schematic published on this forum?
Thanks
 
#396
TB said:
Hello,
I do not want to hijack the thread, but I hope someone can point me in right direction. I am interested in building NS10 in its orginal configuration with single PSU. I found four threads about this preamp, schematic drown by Mr. Pass but with no part values. My electronic knowledge is rather basic, so I am unable to come up with my own circuit simulation. Was full schematic published on this forum?
Thanks
Click to expand...


just make a search for NS10 in this forum

no more than 2 or 3 threads in last time

do some puzzle work with posts from that few threads (we messed them,I know) and you'll have good enough schematic
 
Status
Not open for further replies.
Top Bottom