Aleph-X Official PCB rev Beta & 1.0

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rick57

Member
Joined 2002
Hope you got my email

Case not (I feel odd using the diyaudio snd feature, where you get no record that the email is sent):
Hi grataku

My email is:
richard.grant@nre.vic.gov.au

My postal address:
5 Ballinamona Street
Fairfield VIC
City Melbourne
3078 ('Australian zip' postcode)
Australia

Shipping to Australia = $US5.50
(was when Dale Herman sent me some boards a couple of months ago)
I don't care if it's by
USPS Economy (Surface) Parcel Post
Or whatever
:nod:
Is Paypal best for you??

Paypal charge to you I think is 4%?
To be added to my bill

Let me know total cost

Best Regards,
Richard,
 
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rick57

Member
Joined 2002
Grataku who got them . .

Hi Grataku

> those interested in the boards: send me an email

I sent you ‘an email’ from here a few days back, but haven't heard.

Could you post the status of this here?
:idea:
If you’re short of time, say with names of those who got them . . .

TIA
 
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goskers

Member
Joined 2003
If help is needed with a second run of pcb's I would be more than willing to help out where needed. I understand that it is quite the hassle shipping a couple of hundred boards to many parts of the world.
I am not quite sure who needs to be contacted about this so I am posting this here. Hope this helps.

dance like no one is watching
work like money is no object
love like you've never been hurt

wasser
 
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up4

Member
Joined 2002
ericsonstereo.com
hi all, I bought 6 HiFizen's ALeph X boards.
I am a newbie in Aleph series, got few stupid questions.... really need your guys help !!! :dead:

1. the board is designed as Power Amp circuit, right? (or I misunderstood it... it's for pre-amp ! ??)
2. the input voltage is 15V, wondering if I wanna increase the output power, can I increase the voltage, say + - 50DC ? (so it's roughly 100W)
3. so I realized I need more MOSFET in parallel in order to provide more power consumption... which MOSFET on the board I should increase ?
4. the output has + and - .... wondering.....if it's a power amp... what's the - output for ? the negative input in speaker ?
5. can I make the input stage to unbalanced one? just RCA type instead of XLR? if yes... how ?
6. I've seen many people posting this board contains some "output devise" ... ??? what's that mean ? what devise ?

cheer.
Forest
 
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up4

Member
Joined 2002
ericsonstereo.com
I see ! thanks :)
I thought + - 50V DC only gives roughly 100WATT for poweramp...
it seems SuperSymmetric is different...
it doesn't waste much energy :bulb:

so according to HiFiZen's design (4 MOSFET output per channel), I can get 20 ~ 30 Watt output? or as skaara said, I can get 50W ???
cuz my speaker only has 89db :bawling:


grataku said:
up4
Nelson himself uses 30-0-30 and 32 mosfet/chn (I think) for the XA200 and get 200W burning off 480W in the process, I would definitely stay below that.
15-0-15 gets you ~20 clean watts (clipping at ~30W).
Click to expand...
 
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up4

Member
Joined 2002
ericsonstereo.com
no kidding !!! :bigeyes: :bigeyes:
now I see why 15VDC can boost up to 30W or MORE.
please bear with my stupidness. :dead:

nowater said:
up4 said: I thought + - 50V DC only gives roughly 100WATT for poweramp...
it seems SuperSymmetric is different...
it doesn't waste much energy

It is not more efficient, but it is a bridged amp, which requires lesser voltage rails for the same output power.
Click to expand...
 
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