a newbie Aleph 5 questione

Al Bundy · 27th November 2003, 03:10 AM

hello,

I don’t need to match any of the transistors in the Aleph 5.

Am I right here?

thank you
al

Taco · 27th November 2003, 06:23 AM

Only match the mosfets. The MPSA18 /ZTX450 don't need to be mathed.

Al Bundy · 27th November 2003, 11:39 PM

hi taco,

thank you fpr your answer.

but do i have to match the mosfets?

thank you

al

kilowattski · 28th November 2003, 02:26 AM

Al Bundy,

Al, firstly I think you would get alot more responses if you posted in the Pass Labs Forum on this site. Secondly, the power MOSFETS must be matched, otherwise you can expect to see quite a bit of DC offset on the output of your amp. This is not a good thing for your amp or speakers (your speakers look like a short to DC) and you can expect lots of smoke if you do not trim the DC offset. I suggest you read some of the Aleph X threads in the Pass Labs forum. HTH. BTW there is an Aleph X PCB group buy for $5/board going on as we speak. Visit the Aleph X PCB group buy wiki to sign up.

jleaman · 28th November 2003, 03:15 AM

Quote:

Originally posted by Taco
Only match the mosfets. The MPSA18 /ZTX450 don't need to be mathed.

Humm.. wonder what that ment..

Al Bundy · 28th November 2003, 08:57 PM

Hello,

yeahh, you r right. wrong forum.

thank you for your help. i guess i have to match the transis.

have a nice day

al

Nelson Pass · 29th November 2003, 05:54 AM

That's ok. The omnipresent, omniscient, and omnipotent
Pass (or his horde of minions) grazes all forums.

Pay no attention to that man behind the curtain.

Kashmire · 23rd December 2003, 03:32 AM

Erg! What am I doing here?

What has Pass done to me?

I have wandered far from my path of KT-88s and 300Bs, but I remain steadfast on finding my Zen....

Does it exist in empty space, or on a wafer?

Only my ears will tell the truth.

27th November 2003, 03:10 AM	#1
Al Bundy diyAudio Member Join Date: Nov 2003 Location: nrw	a newbie Aleph 5 questione hello, I don’t need to match any of the transistors in the Aleph 5. Am I right here? thank you al

28th November 2003, 02:26 AM	#4
kilowattski diyAudio Member Join Date: Aug 2003 Location: Long Island, New York	Al Bundy, Al, firstly I think you would get alot more responses if you posted in the Pass Labs Forum on this site. Secondly, the power MOSFETS must be matched, otherwise you can expect to see quite a bit of DC offset on the output of your amp. This is not a good thing for your amp or speakers (your speakers look like a short to DC) and you can expect lots of smoke if you do not trim the DC offset. I suggest you read some of the Aleph X threads in the Pass Labs forum. HTH. BTW there is an Aleph X PCB group buy for $5/board going on as we speak. Visit the Aleph X PCB group buy wiki to sign up. __________________ ----------------------------------------------- Kilowattski

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27th November 2003, 06:23 AM	#2
Taco diyAudio Member Join Date: Nov 2002 Location: Place in the Netherlands	Only match the mosfets. The MPSA18 /ZTX450 don't need to be mathed.

27th November 2003, 11:39 PM	#3
Al Bundy diyAudio Member Join Date: Nov 2003 Location: nrw	hi taco, thank you fpr your answer. but do i have to match the mosfets? thank you al

28th November 2003, 08:57 PM	#6
Al Bundy diyAudio Member Join Date: Nov 2003 Location: nrw	Hello, yeahh, you r right. wrong forum. thank you for your help. i guess i have to match the transis. have a nice day al

29th November 2003, 05:54 AM	#7
Nelson Pass The one and only Join Date: Mar 2001	That's ok. The omnipresent, omniscient, and omnipotent Pass (or his horde of minions) grazes all forums. Pay no attention to that man behind the curtain.

23rd December 2003, 03:32 AM	#8
Kashmire diyAudio Member Join Date: Dec 2003 Location: Midwest	Erg! What am I doing here? What has Pass done to me? I have wandered far from my path of KT-88s and 300Bs, but I remain steadfast on finding my Zen.... Does it exist in empty space, or on a wafer? Only my ears will tell the truth.