[Elecraft] K3--Too much ALC creates energy on opposite sideband?

[K8TE]

There is a big difference between "energy on opposite sideband" and hearing
the opposite sideband.  If you switch to the opposite sideband and can
clearly copy the intelligence, then the issue is sideband suppression.  If
you hear unintelligible audio from the offending signal, that is splatter
with many possible causes, one of which is IMD in the exciter, amplifier, or
both.

ALC is frequently abused with the offending op receiving great audio
reports.  I find many who never monitor ALC while operating SSB. Few ops
give accurate audio quality reports today, much less pay attention to TX
bandwidth when providing reports in spite of the proliferation of SDR's and
panadapters.  Most don't know the difference between RFI in the TX audio
chain and an over-driven signal.  We need to mentor our brethren to help
guide them in the right direction. 

While some might consider this nitpicking, ours is a service based on
science and facts.  However, science and facts are too often ignored.  I use
screen captures from my P3 when pointing out broad signals.  Half of the
offending ops don't have an e-mail on QRZ.com.  Half of those who do are
surprised to learn of their transmitter bandwidth "abuse."  A significant
portion of those don't care and are offended.  Fortunately, that is rarely
the case here.

73, Bill, K8TE

"Sadly, many of those are splattering so wide that you can hear them on the 
opposite sideband.  Unfortunately, a report of great audio does not mean 
great IMD performance."




--
Sent from: http://elecraft.365791.n2.nabble.com/