Aleph-X: High-Power Version

[wuffwaff]

mmmm,


well the first version was allright. I´m not responsible for all the later versions of berekening but if I remember right the v2 and 3 were basically the same with some usefull extensions.

Another thing I see in the one on the right hand side is the dissipation wich is only half (170 watts instead of 340 watts, 6,8Ax50V x 2)

william

[roddyama]

Look what they done to my song, ma
Look what they done to my song, ma
The only thing I could do half right and now it's turning out all wrong, ma
Look what they done to my song

[wuffwaff]

thank you Rodd!

It´s so nice when someone feels sorry for me.

william

[Coulomb]

Grataku, where would one find these PCB's for a 200 Watt Aelph X?



Anthony

[Coulomb]

How might one get such boards?

Anthony

[amo]

Originally posted by grataku
another year, another AX bulk purchase...
A properly dimensioned 50W/chn stereo version will weight in the neighbor of 35kg dissipate 275W with the chassis at 50 deg C.

It's way too late to dig up the formulas now, and I have never dealt with heat dissipation calculations before, so can someone help understand what it would mean to have 6 channels at 30 to 40 watts each - heat wise. From the figure above, it would be around 1KWatt of heat. It sounds huge, but what does it really mean? What will it do to my room temperature? I am set on going 3-way amped, and the heat will be the deciding factor, since I am in Texas, and it already costs USD 150 per month to cool a condo in summer. Excuse the smilies, but I am trying to convey how it feels here in summer.

[roddyama]

Originally posted by Coulomb
Grataku, where would one find these PCB's for a 200 Watt Aelph X?



Anthony

Originally posted by Coulomb
How might one get such boards?

Anthony

Anthony,

See here where Edwin Dorre made a 130wpc AX with 16 output devices per channel. As you can see, he used P-t-P to wire the 4 banks of 4 devices.
http://passdiy.com/gallery/alephx-p3.htm
200wpc will need 4 banks of 6 devices (depending on the per device power disipation). You could use Dale's (Harvardian) output boards, if there are any around.
http://www.diyaudio.com/forums/showt...4019#post64019

[roddyama]

Originally posted by amo


It's way too late to dig up the formulas now, and I have never dealt with heat dissipation calculations before, so can someone help understand what it would mean to have 6 channels at 30 to 40 watts each - heat wise. From the figure above, it would be around 1KWatt of heat. It sounds huge, but what does it really mean? What will it do to my room temperature? I am set on going 3-way amped, and the heat will be the deciding factor, since I am in Texas, and it already costs USD 150 per month to cool a condo in summer. Excuse the smilies, but I am trying to convey how it feels here in summer.

It would be like having one of these in your listening room.
http://www.heater-home.com/heaters/e...ark-3ug62.html
Without the fan.

Knowing that hot air rises, you could duct the heat to the outside.

[wuffwaff]

amo,

six channels 0f 40 watts will give around 6x40x2.5= 600 watts of heat. The faktor 2.5 stands for around 40% efficiency wich is probably a bit too high.

william

[Coulomb]

Roddyama I have 24 of Dales output boards and still have 10 of the FEB as well, yes I have built 2 Aelphs with them so far. So with Chad's boards I would parallel Dales boards off of the outputs?

Anthony