Aleph 3

rhr9 · 20th November 2003, 07:26 AM

Hello everybody ,

As I have got some IRF150 , I would like to know if it is possible
to build an Aleph 3 with those FETs on the output stage .
Did some one try this experience ?

Thanks for your answers , Philippe.

MikeW · 20th November 2003, 01:12 PM

They will work. I have used IRFP 044,048,140,150,240,250,254,260's and some Fairchild HUF75652G3 in different PASS designs. The IRFP's vary a little in sound, but the circuit stays the same. I only had to change one resistor for the Fairchild.

Yonnat · 20th November 2003, 07:11 PM

Salut RH9,

I am finishing my Aleph3 for the next week, I use IRFP244 as needed but have a look on the datasheet for your IRF150, make comparisons about the power, current and tension maybe they will be good, Mike thinks so and he has tried them, for myself I try to be cloth to the original, if you want to buy the IRF 9610 and IRFP240 look at "Reichelt.de" their prices are very cheap (0,50E for the 9610).

Good luck l'alsacien.

Yonnat.

rhr9 · 21st November 2003, 07:43 AM

thanks for all your replies , as soon as I will have enough time , I will build my amp.

Just a remark , I am very astonished to see all these amplifiers with no DC protection on the outputs ! Are they unnecessary ?
I don' t think so ...

So long , Philippe.

Yonnat · 21st November 2003, 04:08 PM

Hy Philippe,

yes this amps are not protected from DC at the output, I ask myself the same question and Mr Pass said he has never heard a return with a DC problem since he builds the Aleph, so I do the same, build your amp with care.
For the PCB, I do it at my own with a standby mode if you are interested you can send me a email, you find my email on this site, I am living in a town near Strasbourg.

Regards.
Yonnat

rhr9 · 23rd November 2003, 04:05 PM

Hello YONNAT ,

Did you get my message on your personal email ?
I am interested by your PCB but I have to finish other projects before I start bo build my Aleph.

Best regards , Philippe.

Yonnat · 23rd November 2003, 06:43 PM

Hy Philippe,

yes I got your message, I will reply to you on your personnal email I think on monday evening, this weekend I had a lot of things to do that"s why my silence.

Regards.
Yonnat.

Bricolo · 23rd November 2003, 06:57 PM

Salut les alsaciens

UrSv · 23rd November 2003, 07:06 PM

Alsatian?

http://hjem.get2net.dk/b-sj/image/shf02.html

Yonnat · 23rd November 2003, 07:08 PM

Hy Bricolo,

it seems that we are a lot of alsacian peoples on thid site and I know many other of us who are builind Pass's projects and they are not member of diy.

Good evening and hope to meet you an other day here or in Alsace.

Regards.

Yonnat.

20th November 2003, 07:26 AM	#1
rhr9 diyAudio Member Join Date: Nov 2003 Location: Alsace	Aleph 3 Hello everybody , As I have got some IRF150 , I would like to know if it is possible to build an Aleph 3 with those FETs on the output stage . Did some one try this experience ? Thanks for your answers , Philippe.

20th November 2003, 01:12 PM	#2
MikeW diyAudio Member Join Date: Sep 2002 Location: North of Boston	They will work. I have used IRFP 044,048,140,150,240,250,254,260's and some Fairchild HUF75652G3 in different PASS designs. The IRFP's vary a little in sound, but the circuit stays the same. I only had to change one resistor for the Fairchild. __________________ MikeW

20th November 2003, 07:11 PM	#3
Yonnat diyAudio Member Join Date: Mar 2003 Location: Strasbourg	Salut RH9, I am finishing my Aleph3 for the next week, I use IRFP244 as needed but have a look on the datasheet for your IRF150, make comparisons about the power, current and tension maybe they will be good, Mike thinks so and he has tried them, for myself I try to be cloth to the original, if you want to buy the IRF 9610 and IRFP240 look at "Reichelt.de" their prices are very cheap (0,50E for the 9610). Good luck l'alsacien. Yonnat. __________________

21st November 2003, 04:08 PM	#5
Yonnat diyAudio Member Join Date: Mar 2003 Location: Strasbourg	DC or not DC Hy Philippe, yes this amps are not protected from DC at the output, I ask myself the same question and Mr Pass said he has never heard a return with a DC problem since he builds the Aleph, so I do the same, build your amp with care. For the PCB, I do it at my own with a standby mode if you are interested you can send me a email, you find my email on this site, I am living in a town near Strasbourg. Regards. Yonnat __________________

23rd November 2003, 06:43 PM	#7
Yonnat diyAudio Member Join Date: Mar 2003 Location: Strasbourg	Message arrived Hy Philippe, yes I got your message, I will reply to you on your personnal email I think on monday evening, this weekend I had a lot of things to do that"s why my silence. Regards. Yonnat. __________________


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21st November 2003, 07:43 AM	#4
rhr9 diyAudio Member Join Date: Nov 2003 Location: Alsace	thanks for all your replies , as soon as I will have enough time , I will build my amp. Just a remark , I am very astonished to see all these amplifiers with no DC protection on the outputs ! Are they unnecessary ? I don' t think so ... So long , Philippe.

23rd November 2003, 04:05 PM	#6
rhr9 diyAudio Member Join Date: Nov 2003 Location: Alsace	Hello YONNAT , Did you get my message on your personal email ? I am interested by your PCB but I have to finish other projects before I start bo build my Aleph. Best regards , Philippe.

23rd November 2003, 06:57 PM	#8
Bricolo diyAudio Member Join Date: Nov 2002 Location: Grenoble, FR	Salut les alsaciens

23rd November 2003, 07:06 PM	#9
UrSv diyAudio Member Join Date: Jan 2002 Location: Sweden	Alsatian? http://hjem.get2net.dk/b-sj/image/shf02.html __________________ UrSv Those who say it can't be done should not stop those who are doing it.

23rd November 2003, 07:08 PM	#10
Yonnat diyAudio Member Join Date: Mar 2003 Location: Strasbourg	Alsaciens Hy Bricolo, it seems that we are a lot of alsacian peoples on thid site and I know many other of us who are builind Pass's projects and they are not member of diy. Good evening and hope to meet you an other day here or in Alsace. Regards. Yonnat. __________________

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