Hello Jinx,

> Bottom right is the Wein bridge using an RA53, which had
> got expensive the last time I looked

    sorry for my ignorance but what's an RA53? Yes, I've searched but found
no information. :)

    Regards,

    Brusque

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Edson Brusque                 C.I.Tronics Lighting Designers Ltda
Researcher and Developer               Blumenau  -  SC  -  Brazil
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