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Old 30th September 2008, 11:48 AM   #701
Gyuri is offline Gyuri  Hungary
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I say thank you for it to you Zen!

I was top notch always, that under the exterior seeming the superficial one an deeply thinker somebody exists.
Who knows it punctually moreover, what somebody's, who is thinking yet altogether, mentality may be like here today in Central Europe.

Gyuri
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Old 30th September 2008, 02:25 PM   #702
Tolu is offline Tolu  Germany
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Default Input impedance

What is the input impedance of the (original) B1 when I omit the pot in the circuit? Or: what impedance "sees" the source?
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Old 30th September 2008, 03:10 PM   #703
Zen Mod is offline Zen Mod  Serbia
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Default Re: Input impedance

Quote:
Originally posted by Tolu
What is the input impedance of the (original) B1 when I omit the pot in the circuit? Or: what impedance "sees" the source?

I told you ;
1M
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Old 30th September 2008, 03:34 PM   #704
Tolu is offline Tolu  Germany
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But why should be the DS1802 than not optimal for B1?

Output impedance of DS1802 ~ 45k
Input impedance of B1 ~ 1M
=> perfect impedance match !?
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Old 30th September 2008, 03:47 PM   #705
Zen Mod is offline Zen Mod  Serbia
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Quote:
Originally posted by Tolu
But why should be the DS1802 than not optimal for B1?

Output impedance of DS1802 ~ 45k
Input impedance of B1 ~ 1M
=> perfect impedance match !?

where is said that DS1802 isn't optimal for terminating it with B1?
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Old 30th September 2008, 05:01 PM   #706
Gyuri is offline Gyuri  Hungary
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Default Something.

Forgive me, kind Grey!
I am not surprised at it altogether if your head begins to ache because of my English lingual inventions.
I have a headache very rarely fortunately. Does after all sometimes, so I know it how bad this.
I ask you do not consider the much silliness, which I wrote down, as a personal attack.
Not your respected person, but I wished to speak against the general phenomenon.
I trust it that the others with reasonable affection his full manifestations help to all of us to the mutual respect
and appreciation. At least in this "narrow" community for which one diyaudio forum its name.
I say thank you for it to everybody, who understood the intention for improvement between my words,especially.
And did not go past them speechlessly!
If only a teeny-weeny one will be better from this our world, the fight was worth it already that I did it
with this cursed machine translation program, myself and my thoughts.
Let me add it to this to it, I translated it once single Nelson Pass interview a translator with a program onto a Hungarian language.
I did not come to myself until three days because of the guffawing then.
And not because of the content!
So that I desire a good entertainment.
With the deepest affection and respect:

Gyuri

Something else.
I would like somebody stopping beside this question onto one or two words:
What do you say to this?

http://www.zeitgeistmovie.com/

I am very curious about anybody's opinion, already if somebody has a thought from this direction.
I wait for their opinion especially who they have better insight into the things for an edge
in this manner they live in USA, than may be the kind for me.
Although the own one is my opinion from this circus is found already.
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Old 30th September 2008, 06:31 PM   #707
Tolu is offline Tolu  Germany
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Quote:
Originally posted by Zen Mod



where is said that DS1802 isn't optimal for terminating it with B1?

OK, then I will try it!

DS1802 with +3V to Vcc and -3V to GND! I hope this will prevent clipping!

I am still waiting for a comment of Nelson or Wayne to this issue...
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Old 30th September 2008, 06:37 PM   #708
Gyuri is offline Gyuri  Hungary
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Default Music.

Yet a thought which cannot be neglected according to me:
After the authors, performers the sound engineer and his devices are responsible for what we listen to in the row.
Not the sound-recording media, not the player equipments, not the amplifiers, not the loudspeakers.
I exaggerated a small one of course in order for the thought to turn into more understandable one here now.

Gyuri
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Old 30th September 2008, 07:10 PM   #709
KSTR is offline KSTR  Germany
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Thomas,

you could try omitting the 1M GND resistor alltogether -- the K170 would get its small, but still always neccessary bias current directly from the DS1802.

Another option would be bootstrapping the bias resistor, as per Fig.9h from this Siliconix appnote:
http://www.colorado.edu/physics/phys...FETbiasing.pdf

Hopefully the DS1802 is click-free (make-before-break switch action), and quite probably it really is.

- Klaus
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Old 1st October 2008, 11:29 AM   #710
lineup is offline lineup  Sweden
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Now that we agree.
Let us concentrate at B1 Buffer Amplifier by Nelson Pass.
As I only read this topic once in a while,
could somebody tell me this:

Give me a couple of good reasons WHY to go for B1 Buffer Preamp
... and not one of my own great Buffer Preamp?


If given 3 good reasons I will build one B1 Buffer
and do some comparing testing to my own designs.
Lineup - thinks he knows, too - not only the master
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