Aleph 3/30

[Tomasz Rodak]

PCB for Aleph 3/30

Hello everybody !!!

Can anybody send me a project of PCB board for
Aleph 3 or 30.
e-mail: [email protected]

Thanks in advance !

 

[Tomasz Rodak]

Vladimir,

Thank you very much.
Well done !!!

Tomek

 

[Tomasz Rodak]

I have problems with finding resistors 0,47 ohm 3W for Aleph 30.
Can I replace them with 2W metal film or wire wound?

 

[Koy]

The higgher wattage the better. I recomend to use more low power resistor ( not dona in my PCB) - you can easily set suitable resistance ( unless zou can match the mosfets). koy

 

[Tomasz Rodak]

Hello everybody !!!

I have been building Aleph 30 power amplifier.
Could you tell me wheather I can use unmatched MOSFET's in it
and wheather I can use 500 VA 2x18 V transformer.
What should be heatsinks thermal resistance ?

Tomek

 

[macka]

Tomasz,

The hexfets need matching, see the passdiy.com site (A75 article), its atcually quite easy and the fun part of the project.

Your transformer should be fine for a stereo pair.

For the heatsink aim for heatsinks with 0.33 degrees C per watt or lower for a 30 degree C rise above ambient (assuming 100 watts disipation per channel). ie 1 per channel

If you can't get this low try for (2) 0.6 degrees C per channel.

Look luck with your project, the results are very worth while!

regards

macka

 

[macka]

Tomasz,

The hexfets need matching, see the passdiy.com site (A75 article), its atcually quite easy and the fun part of the project.

Your transformer should be fine for a stereo pair.

For the heatsink aim for heatsinks with 0.33 degrees C per watt or lower for a 30 degree C rise above ambient (assuming 100 watts disipation per channel). ie 1 per channel

If you can't get this low try for (2) 0.6 degrees C per channel.

Good luck with your project, the results are very worth while!

regards

macka

 

[Tomasz Rodak]

Macka,

Thank you very much for your answer !
Kind regards.

Tomek

 

[Koy]

I finished the A3O ( Volksamp modification). It sounds terribly.So I changed the values to A3. It is somenthing different, much, much better. Doing experiments I removed couplig capacitor ( to current source), turning this amp to SE. I think it is the best I have heared form this amp. Except bass tones. Hi.

 

[Tomasz Rodak]

Thank you Koy for your suggestions.
I think I'll carry out some experiments and choose the
best solution for me.
Tomek