Quiet transformer?

lanchile07 · 26th October 2007, 05:25 AM

Hi when I put my head very close to the chassis, I can hear the transformer working it is a Gainclone LM3875.the transformer is Plitron #200734 300va 22 x 2 120ac.and the rectifier is a single board,(8 diodes total four for each channel)is this normal?
should I get a better transformer (Quieter)?.
this is the only thing that I am worried about.I do not hear nothing from speaker(noise) it is jut from transformer.
thank you.

peranders · 26th October 2007, 06:27 AM

A transformer does hum, some more, some less. If it's not annoying I can't see the problem.

Sherman · 26th October 2007, 12:47 PM

If it bothers you, you can try mounting the transformer on a foam pad and put another one on top between the trafo and the metal disk that clamps it down. That may help.

lanchile07 · 27th October 2007, 05:15 AM

Thank you guys for suggestions.and as you said "peranders" it is not so bad at all.the noise is when I put my ears on top of transformer.so I will leave it like it is.and beside the two channels are noise free.I do not hear any noise except clear music.thank you guys.

26th October 2007, 05:25 AM	#1
lanchile07 diyAudio Member Join Date: Oct 2007	Quiet transformer? Hi when I put my head very close to the chassis, I can hear the transformer working it is a Gainclone LM3875.the transformer is Plitron #200734 300va 22 x 2 120ac.and the rectifier is a single board,(8 diodes total four for each channel)is this normal? should I get a better transformer (Quieter)?. this is the only thing that I am worried about.I do not hear nothing from speaker(noise) it is jut from transformer. thank you.

26th October 2007, 12:47 PM	#3
Sherman diyAudio Member Join Date: Feb 2004 Location: Chicago area	If it bothers you, you can try mounting the transformer on a foam pad and put another one on top between the trafo and the metal disk that clamps it down. That may help. __________________ --Sherman

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26th October 2007, 06:27 AM	#2
peranders Electrons are yellow and more is better! diyAudio Member Join Date: Apr 2002 Location: Göteborg, Sweden Blog Entries: 4	A transformer does hum, some more, some less. If it's not annoying I can't see the problem. __________________ /Per-Anders (my first name) or P-A as my friends call me

27th October 2007, 05:15 AM	#4
lanchile07 diyAudio Member Join Date: Oct 2007	Thank you guys for suggestions.and as you said "peranders" it is not so bad at all.the noise is when I put my ears on top of transformer.so I will leave it like it is.and beside the two channels are noise free.I do not hear any noise except clear music.thank you guys.

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