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Old February 23rd 05, 11:12 PM
Brian Oakley
 
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wrote in message
oups.com...
According to Kiwa's website, their shortwave preamp will make your
receiver quieter. They claim that when you turn off your receiver's
internal preamp and instead rely upon the Kiwa preamp, you will have
fewer noisy circuits operating inside the receiver.

I find myself unmoved by this claim, since it would apply to *any*
external preamp--and most external preamps will do nothing to improve
S/N ratio, at least in my (limited) experience.

Of course, the Kiwa preamp also has a BCB rejection filter. I *do* see
how this could improve S/N ratio, but I'd like to hear some first hand
reports.

If you've used Kiwa's preamp, can you comment on whether it resulted in
a significantly improved signal to noise ratio?

Thanks in advance,

Steve

Why would a preamp not help s/n ratio? If it amplifies the signal along with
antenna noise, then there is less amplification to be done by the radio
itself and the stage noise in the radio will be reduced. It should improve
S/N ratio.
B