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Old 6th November 2017, 12:11 PM
Richard Richard is offline
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Join Date: Dec 2005
Location: Notts
Posts: 4,612
Default Re: Balanced circuits for Pre/phono/psu 2and3

Hi Andy, all,

There's a very readable page here,

The next to last paragraph of that page also deals with quasi balanced cables and explains they're a lose-lose (increase of capacitance and loss of shielding) so it may be worth trying high quality unbalanced coax instead.

The problem of hum though is that the low 50Hz energy is induced and gets through the thin Faraday cage type screen on unbalanced cables which blocks higher frequencies. Isolating the cables, or much heavier screening such as metal conduits, might help.
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