High-End Tube preamp with ECC88 - diyAudio
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Old 2nd July 2012, 07:16 PM   #1
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Thumbs up High-End Tube preamp with ECC88

Hi guys!
I combined with the schematic "Line ubava stage" of Mr. harkonen (Croatia) and made ​​an excellent audiophile preamp with tube/valve ECC88 . This preamplifier in combination with F5-audio amplifier gives the true audiophile sound. Believe me the right one ...
Well here is the complete schematic is given for preamplifier with power supply!
Who will make this amplifier will enjoy the trust of its real tube sound!!
Note:
For stereo needed two identical stages.
Cheers!
Attached Files
File Type: pdf High-End preamp with ECC88 (Schematic-1).pdf (128.6 KB, 2938 views)

Last edited by formula 22; 2nd July 2012 at 07:30 PM.
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Old 2nd July 2012, 07:27 PM   #2
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I don't want to seem controversial but I find it difficult to believe that a simple anode follower direct coupled into a cathode follower, with two largish caps in the direct signal path - can be anything other than ordinary.

Shoog
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Old 2nd July 2012, 07:32 PM   #3
DF96 is offline DF96  England
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It is not an anode follower, but a normal grounded cathode amp with a tapped anode load to reduce gain. It is unclear exactly in what sense the term 'high end' is used.

What is 'the' audiophile sound? Or 'real tube sound'?
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Old 2nd July 2012, 07:37 PM   #4
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Quote:
Originally Posted by Shoog View Post
I don't want to seem controversial but I find it difficult to believe that a simple anode follower direct coupled into a cathode follower, with two largish caps in the direct signal path - can be anything other than ordinary.

Shoog
I apologize in advance to anyone who does not fit the answer!?
This preamplifier has to be heard, will then be commented in his sound.
thank you
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Old 2nd July 2012, 07:40 PM   #5
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But no one will build such an amplifier - because it looks so overwhelmingly ordinary.

There are a wealth of truly exceptional preamplifier designs displayed in this board on a daily basis - this circuit has no obvious magic or appeal to entice a builder to attempt it.

That is just an honest opinion.

Shoog
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Old 2nd July 2012, 07:45 PM   #6
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Quote:
Originally Posted by DF96 View Post
It is not an anode follower, but a normal grounded cathode amp with a tapped anode load to reduce gain. It is unclear exactly in what sense the term 'high end' is used.

What is 'the' audiophile sound? Or 'real tube sound'?
Everything is relative, said Einstein , .. ha,...ha,...
I sound this much like the preamp!
Cheers!
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Old 2nd July 2012, 07:47 PM   #7
DF96 is offline DF96  England
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Fortunately, Einstein knew what he was talking about.
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Old 2nd July 2012, 07:48 PM   #8
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Quote:
Originally Posted by Shoog View Post
But no one will build such an amplifier - because it looks so overwhelmingly ordinary.

There are a wealth of truly exceptional preamplifier designs displayed in this board on a daily basis - this circuit has no obvious magic or appeal to entice a builder to attempt it.

That is just an honest opinion.

Shoog
"OK"
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Old 2nd July 2012, 07:51 PM   #9
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Quote:
Originally Posted by DF96 View Post
Fortunately, Einstein knew what he was talking about.
You are right about Einstein, but here some extent I think I'm right ....
Go on ..
Here is the beginning of a "low cost tube/valve preamp with a nice second harmonic".
In short: Preamplifier with tube sound!

Last edited by formula 22; 2nd July 2012 at 08:13 PM.
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Old 2nd July 2012, 08:00 PM   #10
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I don't need any magic in my amplifiers nor must they imply any extra specials or something. I just want low distortion, inherent clever design and it shouldn't be too complicated (then I would just use OpAmps, DSPs, etc.)

This circuit is nothing special and is just ordinary thats where answers above me are correct.
But it certainly doesn't also have low distortion. With just less than 4.9K load resistance this is a gigantic K2 generator. Now combine with some SET amp and some old fullrange speakers (with overemphasized midrange) and you get the warmest sounding system on earth. Yes, that's the "real tube sound" you are talking about.
Nothing wrong when you like the sound, really. But be aware that not everybody does and that this preamp is more like an effect machine.
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