A New Aleph 5 Is Born

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SNOWCRAB

SNOWCRAB

Member
Joined 2004
Hello every body

I just finish my first ALEPH 5 diy project :dead:

Very hard job for the case but good result.

It drive Pierre Etienne Léon ML4 with no hum.
Incrédible sound from my source REVOX B226.

Some data :

Dual mono contruction.
Transformer 2 x 30 V 500 VA / channel.
Filter (CLC) : 4 x 68 000µF - 2 x 2,3 mH / channel.
Température : 55°C on heatsink. :hot:
Weight : 30 kg.


Many thank too Mr. PASS & KRITIJAN for his good fine PCB.


Thierry BASSAL.
 

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SNOWCRAB

SNOWCRAB

Member
Joined 2004
:) Hello every body

Thank you for you replies

I spend a lot of time on the case because it was very difficult to put all this device in the case.

The heatsink are made in france (SEEM SEMRAC).
A lot of differents heatsinks for all purpose.

I add a soft start circuit on each channel (the amplifier is fully double mono from supply to output), it a PCB from ELEKTOR, very chip circuit, with no supply.

To protect loudspeaker output, i use a DC protection circuit, WELLEMAN K 4700 kit, very chip and easy to use.

I can connect my Pierre Etienne LEON on the speakon NEUTRIK.

You can see between the RCA and the XLR a little switch.
I use it when using the unbalanced input.

The sound is very great, with a good precision.

I am really happy.

My next project is a préamplifier for my REVOX B 226.

Regards

Thierry BASSAL.

Another pic (the WELLEMAN kit K4700)
 

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