[time-nuts] Re : Standards sought for immunity of shielded cable links to power-frequency ground loops (Magnus Danielson)

Marc Bury marc_bury at yahoo.fr
Wed Jan 7 09:35:16 EST 2009



Magnus wrote:
> Isolational transformers (basically 1:1 transformers, preferably double-shielded, where each shield is hooked to the respective cable shield side)
> is usually preferred in this context. It can be effective to connect the grounds on both sides to see if it causes the problem to reoccur, if not it is only
> a precaution to have the transformer.

Isolation transformers are widely used in communications for RJ-45 Ethernet links, with cheaply available 1:1 transformers giving 1Gb/sec and more.
They are also used in standard SP/DIF over coax in digital audio application to prevent ground loops.

So, plenty of cheap available hardware you can re-use for tinkering !

Marc



      


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