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Old 6th May 2005, 10:35 AM   #1
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Default Power Tx core should ground?

Dear brothers here:

The Power Transformer iron core for a tube power-amp should connect to signal ground or earth ground or leave it open? Which is better? Why?

Thanks for reply in advance!

Tray
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Old 6th May 2005, 11:01 AM   #2
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Bond it to the chassis (which should be bonded to mains earth). This will improve safety and may reduce RFI. Signal earth is a different thing and should be bonded to chassis at the input of the most sensitive stage in the system (usually the phono stage).
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Old 6th May 2005, 05:03 PM   #3
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I don't have phono stage, so I should bond it at the CD player or pre-amp stage?

Thanks!
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Old 9th May 2005, 10:01 AM   #4
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Your CD player is probably double insulated (two-core mains lead), so I'd earth at the input of the pre-amplifier.
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