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Old 15th November 2006, 03:07 PM   #1
t3447ml is offline t3447ml  United States
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Default New build of Aleph P1.7 preamplifier

For your consideration, my Aleph P1.7. I would like to thank Nelson Pass and everyone else on this forum for making this hobby accessible to me, Kristijan Kljucaric for the main and power supply boards and Mikkel Simonsen (Dantimax) for the 64 step relay attenuator.
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Old 15th November 2006, 03:09 PM   #2
t3447ml is offline t3447ml  United States
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Old 15th November 2006, 03:10 PM   #3
t3447ml is offline t3447ml  United States
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Old 15th November 2006, 03:30 PM   #4
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Very nice!

Where did you get the chassis and the attenuator board?

How are you enjoying the sound?

-David
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Old 15th November 2006, 03:45 PM   #5
mlloyd1 is offline mlloyd1  United States
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and where did you get the feet?
indeed, very nice looking.
how do you like the sound?

mlloyd1

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Originally posted by dw8083
Very nice!

Where did you get the chassis and the attenuator board?

How are you enjoying the sound?

-David
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Old 15th November 2006, 04:22 PM   #6
folkeb is offline folkeb  Norway
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Hi!

Very nice job indeed! What value (resistor) did you use for the Relvol3 board? Did you put the relvol3 on the output or input?

Best regards,
Folke
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Old 17th November 2006, 01:28 PM   #7
t3447ml is offline t3447ml  United States
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Chassis and feet came off of a junked amplifier I pulled out of the trash.

RelVol3 is on the output set for 1K resistance.

I'm not ready to comment on the sound yet. The system is totally new, consists of an Aleph-X and back loaded Fostex FE108EZ horns. All of which have there own issues. The Aleph-X runs too hot and the horns are weak on bass.
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Old 17th November 2006, 08:51 PM   #8
folkeb is offline folkeb  Norway
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What capasitors did you use on the main board and PSU board? I was thinking of going with BG Ns if nothing else is recommended...

Best regards,
Folke
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Old 20th November 2006, 01:35 PM   #9
t3447ml is offline t3447ml  United States
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Folkeb, thanks for your question, it causes me to recall the many happy hours I spent looking for the right capacitor. I first looked for a metallzed polyprolpyene cap but could find none that would fit the board I was using, as I recall it has a spacing of 27 mm. What I ended up with are 10uf Panasonic ECQ-E(F) metallized polyester caps.
At the time I has not familiar with the BlackGate N caps. With what I have read here in this forum I would be inclined to use them if starting this project now.
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Old 20th November 2006, 04:58 PM   #10
folkeb is offline folkeb  Norway
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Alas, the everlasting discussion, what cap to use? I have heard some say that the MKP caps are better than the BG N's, but then others say otherwise. This leaves me... not that wise!

Have you compared different caps, or was it only a question of size?

Best regards,
Folke
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