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Old 11th April 2005, 11:48 AM   #1
kmj is offline kmj  Sweden
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Default what to do with +-42V and 320VA trafo?

I got a couple of transformers collecting dust, do you guys have some idéas of what to do with them?

the first one is a toroid with 2x+-40V rectified and 320VA and the others are an identical pair of +-42V and 160VA.
I also have 4x10000uF (63V) and 4x2200uF (80V) electrolytic capacitors.

one alternative is the hypex ucd180 but is there some other alternatives?
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Old 11th April 2005, 02:58 PM   #2
shusha is offline shusha  Croatia
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You can build nice solid state amp, but also nice chipamp with regulated power supply. Look at Carlos improved LM3886. Use LM338 voltage regulator to drop the voltage.
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Old 14th April 2005, 07:59 AM   #3
lgreen is offline lgreen  United States
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Default make a chipamp

Yes, you can easily make a chipamp using a regulated power supply. Use two LM338 voltage regulators to create a plus and minus 35 volts or so, and then use an LM3886 (check same site) to make yourself a nice amplifier. You are posting on chipamp forum, its all the rage.
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Old 14th April 2005, 10:06 AM   #4
kmj is offline kmj  Sweden
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Lm3885?
I have an amp based on lm3875 and soon a hypex ucd180.

But since I have 2 sets of transformers it would be a shame to let them go to waist, wouldn't it?

Perhaps wrong part of the forum but are there some transistorbased alternatives?

The major problem when choosing amp is the fact that my speakers like atleast around 100W/channel

(bookshelf, 83-85db sensitivity)
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Old 14th April 2005, 11:38 AM   #5
paulb is offline paulb  Canada
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Default Re: what to do with +-42V and 320VA trafo?

Quote:
Originally posted by kmj
the first one is a toroid with 2x+-40V rectified and 320VA and the others are an identical pair of +-42V and 160VA.
Quote:
Originally posted by kmj
But since I have 2 sets of transformers it would be a shame to let them go to waist, wouldn't it? The major problem when choosing amp is the fact that my speakers like atleast around 100W/channel(bookshelf, 83-85db sensitivity)
Project 68 at www.sound.au.com
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Old 15th April 2005, 09:53 AM   #6
kmj is offline kmj  Sweden
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Quote:
Look at Carlos improved LM3886
do you have a link?
there's quite a lot of treads regarding carlos+ lm3886

edit:
or even better, a link to the amp and supply schematics
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Old 15th April 2005, 10:03 AM   #7
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try tda7293 or 7294
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