NEW Aleph-X calculation sheet: AXE-1

wuffwaff · 30th January 2004, 09:50 AM

Hello all,

since there seems to be a lot of confusion wich version of berekening....is right Hugo (Netlist) convinced me to make a new one and was so nice to put in some links and give some comment on how to improve upon the previous versions. Thanks for this!!

The new one is called AlephXEvaluationsheet1 (AXE-1) and is a normal excel file.
I put some comments in (just hold your mouse on the cell you want to be explained and then you´ll see the comment)

To make thing a bit nicer I also attached my Juntion TempCalculation at the bottom (also with nice explanations

) so now there will never be any more questions like:

Are these big enough, how many fets, what source resistors, etc. etc. etc..........

Comments or question are welcome but please look at it for longer than 5 minutes before you post

William

Taco · 30th January 2004, 09:58 AM

Very nice

. It's a shame my Aleph-X is finished

.

wijgers · 30th January 2004, 10:12 AM

Very very nice,

This helps a lot. Also a bit in understandig whats happening in the circuit.

Great Job William!!!!!!

Nils

Prune · 30th January 2004, 10:46 AM

Thanks so much!

By the way, I want to ask if these also apply to the PCB version.

cocolino · 30th January 2004, 11:12 AM

Fantastic job William!!!

Very easy to handle and helps a lot not only to get things right but to better understand what`s going on!!
In particular I like the graph of output power versus load impedance - very useful!
Thanks very much!!

(hopefully one day I`ll learn also how to use Excel to make such nice things like this)

Alain Dupont · 30th January 2004, 03:02 PM

William,

Quite a good job, thanks.

Alain.

Netlist · 30th January 2004, 03:13 PM

If all goes well, all previous links including the WIKI will be updated with this "Penultimate" version. No more confusion.

Thanks to AudioFreak for that.

/Hugo

roddyama · 30th January 2004, 03:41 PM

Great Job William,

I know this must have taken some time to get everything right.

hifimaker · 30th January 2004, 03:50 PM

Awesome worksheet William!

Warning.... dumb question Alert....

How come the X-Aleph's output drops when the speaker load impedance drops? Many Amp spec sheets have double the power rating for 4 Ohms when compared to 8 Ohms.

Thank you,

-David

tiroth · 30th January 2004, 03:52 PM

It's a class A amp, so your current can never exceed the bias current (at least with AC current gain <=50%).

30th January 2004, 11:12 AM	#5
cocolino diyAudio Member Join Date: May 2002 Location: Bavaria (south of veal sausage equator)	Fantastic job William!!! Very easy to handle and helps a lot not only to get things right but to better understand what`s going on!! In particular I like the graph of output power versus load impedance - very useful! Thanks very much!! (hopefully one day I`ll learn also how to use Excel to make such nice things like this) __________________ Christoph *STEAL the BEST - INVENT the REST*

30th January 2004, 03:41 PM	#8
roddyama diyAudio Moderator Emeritus Join Date: Jan 2002 Location: Michigan	Great Job William, I know this must have taken some time to get everything right. __________________ Rodd Yamashita

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30th January 2004, 09:58 AM	#2
Taco diyAudio Member Join Date: Nov 2002 Location: Place in the Netherlands	Very nice . It's a shame my Aleph-X is finished .

30th January 2004, 10:12 AM	#3
wijgers diyAudio Member Join Date: Aug 2003 Location: Near Rotterdam	Very very nice, This helps a lot. Also a bit in understandig whats happening in the circuit. Great Job William!!!!!! Nils

30th January 2004, 10:46 AM	#4
Prune Account Disabled Join Date: Mar 2003 Location: Vancouver	Thanks so much! By the way, I want to ask if these also apply to the PCB version.

30th January 2004, 03:02 PM	#6
Alain Dupont diyAudio Member Join Date: Sep 2003 Location: Paris - France	William, Quite a good job, thanks. Alain.

30th January 2004, 03:13 PM	#7
Netlist diyAudio Moderator Join Date: Jan 2003	If all goes well, all previous links including the WIKI will be updated with this "Penultimate" version. No more confusion. Thanks to AudioFreak for that. /Hugo

30th January 2004, 03:50 PM	#9
hifimaker diyAudio Member Join Date: Oct 2003 Location: San Jose	Awesome worksheet William! Warning.... dumb question Alert.... How come the X-Aleph's output drops when the speaker load impedance drops? Many Amp spec sheets have double the power rating for 4 Ohms when compared to 8 Ohms. Thank you, -David

30th January 2004, 03:52 PM	#10
tiroth diyAudio Member Join Date: Dec 2001 Location: Pittsburgh, PA, USA	It's a class A amp, so your current can never exceed the bias current (at least with AC current gain <=50%).

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