EI transformers. HEAT?

Aunkst · 22nd April 2004, 04:25 PM

I have a chip amp that I built out of spare parts. the transformer I used is out of an older amp from bestbuy or something. anyway, I left it on for the last week or so because of a turn-on thump and i noticed that the trans is puttinf off a bit of heat. I estimate about 45-50 deg C , hot, but no way near too hot to touch.

Is this normal for an E-I transformer?

BTW, I measured the output to be about 16-0-16 volts ac. and it is powering a lm3886 and an active lowpass crossover.

officeboy · 22nd April 2004, 04:37 PM

I have heard that cheaper EI type transformers do this.
I know the ones in my GC get really hot too, you can still touch them, but they are hot (and smelly).

Aunkst · 22nd April 2004, 05:07 PM

that is very good to know. thanks.

22nd April 2004, 04:25 PM	#1
Aunkst diyAudio Member Join Date: Feb 2004 Location: PA	EI transformers. HEAT? I have a chip amp that I built out of spare parts. the transformer I used is out of an older amp from bestbuy or something. anyway, I left it on for the last week or so because of a turn-on thump and i noticed that the trans is puttinf off a bit of heat. I estimate about 45-50 deg C , hot, but no way near too hot to touch. Is this normal for an E-I transformer? BTW, I measured the output to be about 16-0-16 volts ac. and it is powering a lm3886 and an active lowpass crossover.

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22nd April 2004, 04:37 PM	#2
officeboy diyAudio Member Join Date: Nov 2003 Location: NW Washington	I have heard that cheaper EI type transformers do this. I know the ones in my GC get really hot too, you can still touch them, but they are hot (and smelly).

22nd April 2004, 05:07 PM	#3
Aunkst diyAudio Member Join Date: Feb 2004 Location: PA	that is very good to know. thanks.

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