Re: [TCML] Isolating Transformer

[dave pierson <dave_p@xxxxxxxxxxx>]

> Brian, what do you do with the output earthing? Do you use MOV's or
> other filters?
> I have a 1kW isolating transformer. The only time I have used it live
> was for a briefcase coil (1/2 low power NST for 3 inch sparks).
> Interfered with the PA some distance away big time. I used a
> counterpoise plus mains earth.

    Was the interference present with the isolation transformer?

    Isolation transformers come in (at least) two types.
    The usual/simple type is just a one/one transformer,
    two coils and core.  This provides isolation for DC
    and LF AC, however stray capacity between windings/core
    can couple RF.

    A more elaborate type includes a 'screen' (internal
    Faraday Cage), which reduces the RF coupling.  Sometimes,
    if i recall, referred to as an 'instrumentation
    transformer'?

     best
      dwp
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