On Sat, 29 Jun 2002, Jim wrote:

>Peter wrote:
>
>    "(I live in a city that thinks RFI is a
>     brand of cheese - nobody cares about EMI
>     filters and such). That's why I hope a
>     good preselector will help me."
>
>No amount of 'preselectoring' or filtering is going to
>correct a 'bad' S/N (SIgnal to Noise) ratio due
>to computer noise and other urban electrical noise
>that appears "in-band and on-channel".

I aggree. It is wideband hash and impulse noise from 'spark gap
transmitters'.

>If, however, your receiver is experiencing "Front
>End Overload" from close-by AM or SW broadcast stations
>THEN a preselector can do some good!

The receiver is simple and it cannot cope with the wideband noise.
Co-channel it can deal with.

Peter

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