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Old 30th December 2007, 09:59 AM   #1
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Default Borbely Hybride Phono Preamp

Hi everybody,
I read this article ( link below ) on Borbely´s web site and I think very intersting. Someone just build or knows who build that circuit ? Could say something about the sound of Borbely´s hybride phono preamp ? Is it bad, good or very good?



http://www.borbelyaudio.com/adobe/phono.pdf
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Old 22nd October 2012, 05:54 AM   #2
Sadko is offline Sadko  Russian Federation
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Hi,
I did that mc/mm hybrid Borbely' phono preamp.

Initially I used ecc83 at output but THD was quite high. (~0.3% at 10kHz)
I replaced it by Soviet 6N23P (without -EV index).
And obtained an amazing 0.01% THD at 1 kHz and about 0.03% at 15-20kHz.
Just pure 2nd harmonic.

MC part is not finished yet.
I'm wait for a MC low output cartridge and then continue this project.

But just MM part is so good that do not comparable to any other tube preamp I know.
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Old 22nd October 2012, 06:28 AM   #3
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A circuit?
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Old 22nd October 2012, 07:04 AM   #4
Sadko is offline Sadko  Russian Federation
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http://www.audiodesignguide.com/Phono/phono.pdf
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Old 22nd October 2012, 07:57 AM   #5
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Thanks. Definitely not for me.
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