AlephX with 610?

ijomojo · 31st August 2005, 11:06 PM

attention! noob question:

Is it possible to build an AlephX with 610-type fets?

Wouldn't the performance be better at much lower mosfet capacitance and higher supply-voltage?
I know that one would need many devices to get some power from it and dissipation will massively increase

, but basically: (if it's possible) will there be any pros beside the contras?

me if I'm typing complete nonsense, maybe I missed something...

mojo

Magura · 31st August 2005, 11:11 PM

Try calculating the capacitance for the number of IRFP240's you intend to replace with IRF610's, then calculate the capacitance for the IRF610's. You will find that those two results are very close.

Generally for a given number of watts you have a given capacity.

Magura

GRollins · 1st September 2005, 12:21 AM

The voltage isn't a problem, but I think you'll find that the current capability and heat dissipation will be a little too close to the limits for the device. You'll have relability problems, even if the amp turns on okay.

Grey

ijomojo · 1st September 2005, 05:45 PM

Thanks for the feedback
It was just an idea in my head... Now I see the point, I think: one would have to replace the IRFP240 with 9 pcs of IRF610 to get the transconductance, while having about the same ratio of capacitance - right?

There is a lot to learn arround here (beside the english practice) - a really nice forum!

Bye,

mojo

31st August 2005, 11:06 PM	#1
ijomojo diyAudio Member Join Date: Jan 2005	AlephX with 610? attention! noob question: Is it possible to build an AlephX with 610-type fets? Wouldn't the performance be better at much lower mosfet capacitance and higher supply-voltage? I know that one would need many devices to get some power from it and dissipation will massively increase , but basically: (if it's possible) will there be any pros beside the contras? me if I'm typing complete nonsense, maybe I missed something... mojo

31st August 2005, 11:11 PM	#2
Magura diyAudio Member Join Date: Oct 2003 Location: Denmark, Viborg	Try calculating the capacitance for the number of IRFP240's you intend to replace with IRF610's, then calculate the capacitance for the IRF610's. You will find that those two results are very close. Generally for a given number of watts you have a given capacity. Magura __________________ Everything is possible....to do the impossible just takes a little while longer. www.class-a-labs.com

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
AlephX PSU- need help	bach2800	Pass Labs	6	6th July 2006 10:53 PM
Best 1st amp:AlephX, 5 or a Zen?	rif	Pass Labs	7	15th April 2004 05:56 PM
ApexJr AlephX?	tiroth	Pass Labs	5	8th February 2004 01:58 AM
alephx dc offset	lumanauw	Pass Labs	10	24th December 2003 10:15 AM
IRF 230 or IRFP 140, what's better for AlephX ?	Peter Daniel	Pass Labs	29	26th September 2002 04:05 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

1st September 2005, 12:21 AM	#3
GRollins diyAudio Member Join Date: Feb 2001 Location: Columbia, SC	The voltage isn't a problem, but I think you'll find that the current capability and heat dissipation will be a little too close to the limits for the device. You'll have relability problems, even if the amp turns on okay. Grey

1st September 2005, 05:45 PM	#4
ijomojo diyAudio Member Join Date: Jan 2005	Thanks for the feedback It was just an idea in my head... Now I see the point, I think: one would have to replace the IRFP240 with 9 pcs of IRF610 to get the transconductance, while having about the same ratio of capacitance - right? There is a lot to learn arround here (beside the english practice) - a really nice forum! Bye, mojo

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)