Re: multi-glazed windows on Tangaras and other trains.

[matthew@mail.usyd.edu.au (Matthew Geier)]

In article <810nfd$nhj$1@lios.apana.org.au>,
C. Dewick <craigd@lios.apana.org.au> wrote:
>In <01bab4df$aa904c00$ed0565cb@tom-boles> "Jonathan Boles" <mousewithglasses@hotmail.com> writes:
>
>The multi-glazed windows provide excellent soundproofing for external
>sounds, but the major interior noise problems in Tangara's result from the
>static inverters above our cabs,

 It aint the inverter as such, it's loose laminations on the power transformer connected to 
the Inverters.
 The manufacturer told the fitters to just tighten the bolts, but this doesn't hide the
fact that the transformers have been built right to the minimum spec they could get
away with.
 If they put in bigger transfomers with more copper in them, the lamitations wouldn't tend
to vibrate as much!.