tonne at comcast.net
Fri Mar 19 10:38:55 EDT 2010
> there do appear to be some SW BC that
> transmit up to about 15 KC.
I seriously doubt that! International shortwave
regulations require a flat response to 4500
Hz and a sharp rolloff above that. I don't know
the required degree of attenuation at 5 kc
but I think 35 dB down is an accepted standard.
15 kc response would require a 30 kc receiver
bandwidth - most unlikely.
- JimT W4ENE
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