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Old 6th June 2003, 07:17 PM   #1
mik is offline mik
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Default Lower supply rails for this amp?

Can this amp run on +40/-40 supply rails?

Thanks!

http://www.futura-shop.com/pdf_ita/7100-FT15K.pdf
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Old 6th June 2003, 08:51 PM   #2
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Shouldn't be any problem as far as I can see, but the maximum
output power will be lower, of course. A rough calculation would
be around 55W in 8 Ohms.

Maybe one should lower the value of R3 correspondingly, but
that is probably not necessary.
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Old 6th June 2003, 09:15 PM   #3
mik is offline mik
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Thanks Christer!
I think that 55W in 8 ohms are enough !
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Old 7th June 2003, 09:32 PM   #4
djk is offline djk
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Change R3 to 39K

Because of the lateral MOS this amplifier will only do about 40W at 8 ohms with a simple 40V supply.

The Hafler DH120, SE120 use about the same circuit and 52V and do 60W/8R or 90W/4R(1Khz)

http://www.hafler.com/techsupport/index.asp?ID=3
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Old 11th June 2003, 10:22 AM   #5
mik is offline mik
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DJK
Thanks for your suggestions!
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