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Old 18th December 2006, 07:59 AM   #121
steenoe is offline steenoe  Denmark
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Quote:
Do you plan to build a NS10 clone to compare with your real one?
Thats the plan. When the Real one is finished, I will change the first clone to the real clone. Confused Me too

Steen
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Old 21st December 2006, 10:34 AM   #122
steenoe is offline steenoe  Denmark
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Quote:
if you can't afford VOT........
What is a VOT? If I know already, I have forgotten I am looking for a pair of 15" Tannoy Berkley's, they were earlier pretty popular around here.

Steen
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Old 21st December 2006, 11:59 AM   #123
Formerly "jh6you". R.I.P.
 
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Quote:
Originally posted by steenoe


What is a VOT?

Voice of Theater . . .

was my dream, old days
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Old 5th February 2007, 09:50 AM   #124
beppe61 is offline beppe61  Italy
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Quote:
Originally posted by apassgear

The NS10 has about 1K output impedance and low power so it wont drive any headphone.
For this you would need to add a buffer to the output.
I don't have a ready solution for this, but will think about it.
If you only need is a headphone driver it will be best to tackle an amp that was specificaly design for this purpose, there are many projects on the forum you could try.
Hope you find a solution
Please excuse me Sir, why that 1K resistor at the ouptut elevating the output impedance?
Maybe removing it you could also drive a medium impedance headphone (something > 100 ohm)?
Moreover, what is the purpose of that LF351 ?
Is is a servo for offset nulling ? why with a cap at the output?
It seems that the original has an extremely good sound indeed:
http://forum.audiogon.com/cgi-bin/fr...1740&read&3&4&

A good sound from a cap coupled preamp with a 317 based power supply ?
More blasfemous than "the Da Vinci code" indeed


By the way, is there a pcb for the clone ?
I am extremely interested in buying 3 samples, if not exaggerately expensive


Thank you very much for the extremely interesting 3D.
I understand it is a very good sounding SS line stage, my neverending dream !

Kind regards,

beppe


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Old 6th February 2007, 12:28 AM   #125
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Hi Beppe.

NS10 was designed to be a lineamp to feed some 10K+ input amp and not a phone driver, you can do without the 1K resistor if you like but that won’t help the situation for 100 Ohm cans even with big caps at the output, to my knowledge. For this to work you will need a buffer that can deliver some power.

On the power supply you are free to do what you think it works better, Pi filters will do nice here too, try CLC or other more complex filters with or without regulation.

Regarding the opamp read the thread and you will find answers. It is biasing Q1.

As far as I know there was no PCB done other than a couple etched by our friend Steenoe.
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Old 6th February 2007, 05:34 AM   #126
steenoe is offline steenoe  Denmark
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I will start populating the NS10-clone any time now. (I cant stay on that honeymoon with the A-X's forever ) I am looking forward to hear how it performes in comparison to the real thing.
For reference, this is the NS10:
Threshold NS10 renewed

Steen
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Old 6th February 2007, 07:04 AM   #127
beppe61 is offline beppe61  Italy
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Quote:
Originally posted by apassgear
Hi Beppe.
NS10 was designed to be a lineamp to feed some 10K+ input amp and not a phone driver, you can do without the 1K resistor if you like but that won’t help the situation for 100 Ohm cans even with big caps at the output, to my knowledge.
For this to work you will need a buffer that can deliver some power.
On the power supply you are free to do what you think it works better, Pi filters will do nice here too, try CLC or other more complex filters with or without regulation.
Regarding the opamp read the thread and you will find answers. It is biasing Q1.
As far as I know there was no PCB done other than a couple etched by our friend Steenoe.
Thank you very much indeed Sir, for your kind and valuable reply.
As you can well understand I am trying to learn something here.
Very interesting 3D indeed.
Thanks again and kind regards,

beppe
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Old 6th February 2007, 07:12 AM   #128
beppe61 is offline beppe61  Italy
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Quote:
Originally posted by steenoe
I will start populating the NS10-clone any time now.
(I cant stay on that honeymoon with the A-X's forever )
I am looking forward to hear how it performes in comparison to the real thing.
For reference, this is the NS10:
Threshold NS10 renewed
Steen
Thank you very much indeed Mr Steen.
I will follow the evolution of your tests with the greatest interest.
I am always in search of a nice sounding line preamp in order to replace my present Bryston .4B (no soundstage reproduction.
I would like to write to you privately if I do not disturb.
Anyway great 3D indeed !
Sometimes I wonder if there is still something to discover.
This is maybe a 30 years old design that makes obsolete newer design ! Amazing !

Thanks again and my kindest regards,

beppe
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Old 11th February 2007, 11:11 AM   #129
e-type is offline e-type  Denmark
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Default M1 mc amp

Steen and others.
You have an M1 mc amp, simlar to the one I have obtained. Did you ever find a diagram for this unit ?
Somebody has been trying to fix a resistorproblem, but who ever it was couldn't find the correct resistor, and have tried to couple 2 different values to one. I can find out, that the resistor problem might be the only problem, so if you ore anybody in this forum has the scematics I would love to have a copy.
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Old 11th February 2007, 11:11 AM   #130
e-type is offline e-type  Denmark
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I have used Steens picture to square off my resistorproblem.
By the way. Which color is the + supply, black ore transparant ?
Attached Images
File Type: jpg m1_resistor.jpg (79.8 KB, 909 views)
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