Hoffman Amplifiers Tube Amplifier Forum
Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: ncusack on December 31, 2013, 01:06:46 pm
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Hey Everyone,
I recently built a little 18W amp and when I put it together I didn't use an EMI filter on the mains and was wondering if something like this would be a decent choice to add filtering after the fact.
http://www.digikey.ca/product-detail/en/F1199AA06/364-1051-ND/1869583 (http://www.digikey.ca/product-detail/en/F1199AA06/364-1051-ND/1869583)
Aside from weather that's the right kind of part I would also like to know if this will change the mains grounding scheme at all.
Cheers,
Neill
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I didn't use an EMI filter on the mains and was wondering if something like this would be a decent choice to add filtering after the fact.
That's fine.
I would also like to know if this will change the mains grounding scheme at all.
No change. Just run a short ground wire to chassis, preferably the same chassis bolt that the green wire in your power cord is connected.
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There are many different types at different prices when you look them up.
Some/many are for medical equipment that we don't need and cost more.
I'm not sure which ones are the best for our type of application.
Brad :icon_biggrin:
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In our world, we catch more radio-crap on the guitar cord than the power cord.
I suppose if you are running on a generator with bad brushes on a long power cord, brush-hash could exceed crap caught by the guitar cord, and a filter would be useful. But IMHO rarely essential.
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I never see that in guitar amp and I never need one .
If you want add one ( why ? ) wich one will work best ?