[R-390] R390 whistle filter data

[Perry Sandeen]

Hi Gang,

In Chuck Felton's r390 article in Electric Radio he showed the addition of a 5Kc whistle filter
uing a 1 Henry choke and IIRC 690pf cap in series.

Three questions.  Was that a mis-print for the inductor value?  If not does anyone know what he
used for the inductor?  Has anyone tried the mod?

Regards, Perrier

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