[sdiy] Noisy transformers and faraday cages

[Scott Gravenhorst]

AlanP <alan.p at orcon.net.nz> wrote:
>At 04:44 a.m. 12/05/2007, you wrote:
>>They need a complete path. Mu-Metal gives the escaped flux a
>>perferred path to follow, rather than through your wiring.
>>A box over the top will have limited value.
>
>Is there any reason why the transformer can't be in it's own little steel 
>box, separate to the main case?
>
>Mains power cord -> xfrmr box -> post-xfrmr-cord -> synth-case -> synth psu 
>unit

That would be my solution, or put the entire power supply in the box, like a super DC
wallwart.

I also wonder if it would be possible for the person with this 9090 (sorry, can't recall
the poster) could replace the coax that has to run next to the transformer with a longer
piece that can be judiciously placed to eliminate this effect?





>--
>Alan Podjursky                  ICQ 24423014
>"Yay, evil evil! Happy torture!" -- Gwyneth
>"When in doubt, use brute force." -- Ken Thompson
>http://www.fanfiction.net/~mercva 
>
>_______________________________________________
>Synth-diy mailing list
>Synth-diy at dropmix.xs4all.nl
>http://dropmix.xs4all.nl/mailman/listinfo/synth-diy
>

-- ScottG

---------------------------------------------------------

-- Scott Gravenhorst
-- GateMan I - Xilinx Spartan-3E Based MIDI Synthesizer
-- FatMan: home1.gte.net/res0658s/fatman/
-- NonFatMan: home1.gte.net/res0658s/electronics/