Aleph P, Balanced Out if unbalanced in? - diyAudio
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Old 25th March 2008, 01:11 PM   #1
Konsti is offline Konsti  Germany
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Default Aleph P, Balanced Out if unbalanced in?

Hi Folks!

Recently I decided to build myself an Aleph-J power Amp. Meanwhile, while buying Parts of it I wonder what to do with my never finished Tube SRPP Pre... Well, I think I will ditch this in Favour of the much interesting Aleph P and an external Phono stage since I will ditch my Phono stuff also in t
he future.

Therefore I realize the symmetrical input of Aleph-J is very comfortable now.

Does Aleph P output an symmetrical Signal if it is fetched unbalanced? I think so but don't call me god when it comes to more than two TRansistors in one Cicuit :-)

Kind Regards, Konsti
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Old 25th March 2008, 03:30 PM   #2
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Hi Konsti,

Yes, it does - but don't forget to short the other unused inputs (-inputs) to ground. In the commercial Aleph P this is accomplished by shorting plugs between pins 1 and 3 on the XLR (female) input connectors.

Which version do you have? 1.0 or 1.7?

Regards Dirk
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Old 26th March 2008, 10:53 AM   #3
Konsti is offline Konsti  Germany
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Still I actually have none Aleph-P I am considering to build one while I start my Aleph-J. They would match so fine... ;-)
I wanted to omit the XLR Connectors but now I know I will definately add them to be prepared!
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Old 26th March 2008, 03:41 PM   #4
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Have no AlephP, but I think you should build the P1.7. It is technically the better choice to convert a single ended signal in a balanced one.
The P1.0 uses resistors for biasing and loading the gain mosfets - the P1.7 offers constant current sources for this job.

Dirk
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Old 26th March 2008, 03:56 PM   #5
Konsti is offline Konsti  Germany
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I looked above my bookmarks, pdf collection, it actually _is_ the V1.7 I will start to build :-)
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Old 26th March 2008, 08:36 PM   #6
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Quote:
Originally posted by noisefree
Have no AlephP, but I think you should build the P1.7. It is technically the better choice to convert a single ended signal in a balanced one.
The P1.0 uses resistors for biasing and loading the gain mosfets - the P1.7 offers constant current sources for this job.

Dirk

Technically you may be right. I still prefer the sound of the 1.0
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