transformer al5

costiss · 27th January 2003, 12:57 PM

what should the pass aleph 5 transformre r rating be ??(voltage+power)

wuffwaff · 27th January 2003, 01:00 PM

Costiss,

25-27 volts secondaries, 300-600VA per channel.

william

piewie · 27th January 2003, 05:40 PM

i've allready started building my aleph 5, but i'm using two
750VA 30-0-30 transformers, will this give a problem concerning the voltage?

xsnailx · 27th January 2003, 06:20 PM

i have 650 va 2*28v
30 v should be no problem

costiss · 28th January 2003, 12:15 PM

and now comes the grand great question... downscaling this wonderful (i once heard an original...) amplifier to one pair of irf244...is it possible? how much would this output? 20w, i suppose..or? would 64000uF of capacitance be enough in sucha case?
2nd q. ....do regulated supplies like..say the ML2 one (+/-32v) work in this???
3rd ...how much drive rms is required to drive them into full power?

panos29 · 28th January 2003, 05:20 PM

Geia soy Costiss!

Loipon,

Its very possible to do so, as far as you do not exceed about 40W on each mosfet, but in such a case i would personally build the ZenV4. I allready have both and my taste is towards the V4.
My aleph clone is about 30w and my V4 about 17W. At least on my tannoys 15 HPD the V4 is more musical although marginally less "bassy", but the mid region is super to say the least! Driving requirement is more than conventional amplifiers and you should have around 2 volts for full drive (on aleph about 1,5)but most modern preamplifiers will do that, I use a diy aleph L . The aleph transformer I use is a 680W toroid with split secondaries of 2X24Vac, under load the dc output is +/-27,5V and bias current 2amps in winter and 1,5A in summer. Willing to help you in any way(I know all local "hidden" sources), just email me panos29@yahoo.com

Regards,

Panos

27th January 2003, 12:57 PM	#1
costiss diyAudio Member Join Date: Dec 2002 Location: greece	transformer al5 what should the pass aleph 5 transformre r rating be ??(voltage+power)

27th January 2003, 01:00 PM	#2
wuffwaff diyAudio Member Join Date: Aug 2001 Location: Ingolstadt Germany	Costiss, 25-27 volts secondaries, 300-600VA per channel. william __________________ een ooievaar is geen konijn want zijn oren zijn te klein!

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27th January 2003, 05:40 PM	#3
piewie diyAudio Member Join Date: Jan 2003 Location: at home :)	i've allready started building my aleph 5, but i'm using two 750VA 30-0-30 transformers, will this give a problem concerning the voltage?

27th January 2003, 06:20 PM	#4
xsnailx diyAudio Member Join Date: Dec 2002 Location: Poland, Cieszyn	i have 650 va 2*28v 30 v should be no problem

28th January 2003, 12:15 PM	#5
costiss diyAudio Member Join Date: Dec 2002 Location: greece	and now comes the grand great question... downscaling this wonderful (i once heard an original...) amplifier to one pair of irf244...is it possible? how much would this output? 20w, i suppose..or? would 64000uF of capacitance be enough in sucha case? 2nd q. ....do regulated supplies like..say the ML2 one (+/-32v) work in this??? 3rd ...how much drive rms is required to drive them into full power?

28th January 2003, 05:20 PM	#6
panos29 diyAudio Member Join Date: Dec 2001 Location: ATHENS, GREECE	Geia soy Costiss! Loipon, Its very possible to do so, as far as you do not exceed about 40W on each mosfet, but in such a case i would personally build the ZenV4. I allready have both and my taste is towards the V4. My aleph clone is about 30w and my V4 about 17W. At least on my tannoys 15 HPD the V4 is more musical although marginally less "bassy", but the mid region is super to say the least! Driving requirement is more than conventional amplifiers and you should have around 2 volts for full drive (on aleph about 1,5)but most modern preamplifiers will do that, I use a diy aleph L . The aleph transformer I use is a 680W toroid with split secondaries of 2X24Vac, under load the dc output is +/-27,5V and bias current 2amps in winter and 1,5A in summer. Willing to help you in any way(I know all local "hidden" sources), just email me panos29@yahoo.com Regards, Panos

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