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Old 25th August 2003, 06:59 AM   #1
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Question Power supply question

Hello!
I have two 2*40/150VA and one 2*38/550VA toroids. Can I use all toroids for feeding my amplifier? I mean how I connect these toroids? Would it work if I just after diodes put wires together (paraller)?
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Old 25th August 2003, 08:12 AM   #2
r0cket- is offline r0cket-  United States
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First, what are the power requirements for the amplifier you're building?

There're a number of ways to use multiple transformers together, but whether you can actually use any of them to power your amplifier really depends on the voltage/current requirements of that amp.
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Old 25th August 2003, 10:02 AM   #3
sss is offline sss  Israel
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u can connect the two 2*40/150VA transformers in parallel , be carefull while doin so ,u got to properly phase those transformers.

imho u cant connect the other toroid because it got different power rationg , connecting different power transformers is not reccomended plus it got different voltage out !!
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Old 25th August 2003, 10:07 AM   #4
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What is you purpose? 550 VA seems quite sufficient for an amp.
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Old 25th August 2003, 12:09 PM   #5
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Hello again...
I will build two of these amps http://www.aussieamplifiers.com/lateral.htm

Would I use 2*40V/150VA toroids for pregainstates and the big toroid for the main powermosfets?
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Old 25th August 2003, 12:14 PM   #6
sajti is offline sajti  Hungary
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Good idea. Separated PSU for driver stages reduce the distortion.

Sajti
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Old 25th August 2003, 12:23 PM   #7
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Will the big toroid be enough for two amps (only for the mosfets)? what about the little ones for pregains?
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Old 25th August 2003, 12:44 PM   #8
sss is offline sss  Israel
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u wanna use 2 150VA for the gain stages ???
thats more then enough

i think the 550VA will be jus enough for the 2 amps



Quote:
Good idea. Separated PSU for driver stages reduce the distortion
i use voltage regulators for the gain stage so another psu is not needed
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Old 25th August 2003, 01:21 PM   #9
sajti is offline sajti  Hungary
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Quote:
Originally posted by macgyver
Will the big toroid be enough for two amps (only for the mosfets)? what about the little ones for pregains?
One transformer for driver stages, more than enough. The 550VA toroid is enough for 2pcs. of 150W amplifier.

Sajti
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