[R-390] Noise Floor question

[Perry Sandeen]

In ads for the R390A the term of "noise floor close the theoretical limit"  yada yada yada. is
often mentioned.  A search on google didn’t yield anything comprehensible.

If we follow Roger Ruszkowski’s method for achieving a 30db ratio, then by logical definition we
are lowering the noise floor by a ratio-metric method.

I know the receiver has a very low "noise floor" but how would us mere mortals measure it?  Short
the antenna input, terminate the audio out put with a 600 ohm resistor turn up the RF gain and
audio controls and then measure the AC voltage on the termination resistor with a micro-voltmeter?

If one did Chuck Ripple’s audio improvements are we lowering the noise floor or just making a
better sounding audio output or both?

Inquiring minds ever seek knowledge for improving our radios.  Regards, Perrier



__________________________________________________
Do You Yahoo!?
Tired of spam?  Yahoo! Mail has the best spam protection around 
http://mail.yahoo.com