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Old 27th July 2005, 09:24 PM   #1
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Default What can I do with this tranny?

hey I've got a transformer laying around, was wondering what voltages I can get out of it after rectification. Its 24vac @ .8 amps center tapped, and 11 vac @ 1 amp ct. So, +/- 12 volts and +/- 5.5v I'm assuming. I know rectification of an ac voltage rasies voltage, but how much voltage can I get total +/- out of the 24v ct section, and at what amperage?
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Old 27th July 2005, 09:30 PM   #2
cowanrg is offline cowanrg  United States
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its probably not enough current to do a whole lot with. maybe a preamp or xover circuit? most likely not enough juice for an amp though.
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Old 27th July 2005, 09:51 PM   #3
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ok. It was used to power a TDA2050 and some rohm 10 watt chip in a 2.1 system. Big waste of space if you ask me.
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Old 27th July 2005, 10:43 PM   #4
cowanrg is offline cowanrg  United States
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after rectification you will get a factor of about 1.4 time the original voltage. so, you would get 33.6V out but still at 0.8A.
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Old 27th July 2005, 10:55 PM   #5
paulb is offline paulb  Canada
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You can run a small amp with it. Surprising how little power you need in most situations. Average listening levels are probably something under 1 watt.
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Old 27th July 2005, 10:58 PM   #6
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well my pocket amp runs on a 32 volt 940 ma psu with no problems, accept of cource for diminished power output. So technically speaking I could build up to a 26 watt amplifier (33.6 x .8) with this power supply, like the TDA2040, or even the TDA2050 run at a lower voltage?
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Old 27th July 2005, 11:00 PM   #7
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p.s. how do I rectify it? I have a bridge rectifier that came off the amp board it powered, as well as some 12 volt + and - regulators.
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Old 27th July 2005, 11:04 PM   #8
cowanrg is offline cowanrg  United States
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here is a good example from decibel dungeon.

Click the image to open in full size.
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Old 27th July 2005, 11:09 PM   #9
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ok. Thanks! Looks pretty simpl, But , the fuse board is still attached to the transformer. It only had 2 wires in........I dont think it has a ground wire, does that matter, should I just follow the digram below for the rectification?
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Old 27th July 2005, 11:12 PM   #10
cowanrg is offline cowanrg  United States
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it only has two wires into the transformer, or two wires into the fuse board?

maybe a picture could help? but either way you should be fine and the diagram above should still be applicable.
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