[Elecraft] Best way to use NB and NR?

[Ron D'Eau Claire]

As usual, Don's explanation is dead on. 

There's one more point to make about the noise blanker. Because it switches
the receive path off and on to product those holes were the noise pulse
would otherwise come through, it is a "mixer". That is, any signals in the
signal path that are being switched on and off produce some and difference
frequencies across the spectrum. To the listener the result may be an
increase in the general background noise heard or strange artifacts such as
key clicks on CW signals that are, in fact, generated within the receiver by
the noise blanker and not coming from the transmitting station at all.
Similar distortions may be apparent on SSB and other signals. 

Normally these by-products of the noise blanker will be far less of a
problem than the noise, but they demonstrate how important it is to turn the
noise blanker OFF when it's not actually needed. 

73,

Ron AC7AC