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Old 10th September 2004, 11:18 AM   #1
rs1026 is offline rs1026  India
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Default shielding a E-I transformer

If plan to house PS and the AMP in the same unit. How do I sheild a EI transformer.

Also wanted to know if sonics will be very bad if I use a EI transformer. As of now I wanted to test the setup with a EI transformer since I cannot afford a torodial.

Thanks in advance
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Old 10th September 2004, 11:20 AM   #2
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Quote:
Also wanted to know if sonics will be very bad if I use a EI transformer
Not at all will it sound bad. If you have a noisy mains environment it could be a better choice than a toroid.
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Old 10th September 2004, 11:27 AM   #3
rs1026 is offline rs1026  India
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Smile but how to shield

Thanks Bas, but any ideas how to sheild the transformer?
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Old 10th September 2004, 11:44 AM   #4
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I use aluminium tape.
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Old 10th September 2004, 12:19 PM   #5
rs1026 is offline rs1026  India
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Default aluminium tape??

Should I cover the transformer with aluminum tape ??
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Old 10th September 2004, 12:25 PM   #6
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Quote:
How do I sheild a EI transformer.
Depends...what do you want to shield it for.
a.) Shielding the circuitry from the magnetic fields?
or
b.) Shield the transformer from RFI.

In the first case you should get a pre formed mu-metal casing.

in case of b.)

You could use alu foil or special made copper foil from 3M.

The last option (b) won't necessarily give an improvement in sound..

Cheers,
Bas
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Old 10th September 2004, 12:39 PM   #7
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1) Amps using unshielded EI transformers may sound better with the transformer on a different metal box.

2) You may try using a steel plate to separate the supply area from the amp area.

3) You may also try mu-metal tape, but it won't be as effective as 1. Using 2 +3 may prove effective too.



Carlos
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