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

Jim Brown jim at audiosystemsgroup.com
Wed Aug 28 17:18:13 EDT 2019


On 8/28/2019 1:46 PM, Michael Walker wrote:
> I am not a big fan of compression and in today's world there really is no
> requirement to have it on.  Ask anyone who has been DXPedition end of a
> DXPedition and they will tell you to turn it off as it is actually harder
> to understand you.

This is NOT true if compression is well adjusted -- 10 dB of well 
adjusted compression increases talk power by 10 dB, and setting TXEQ to 
remove speech content below 400 Hz helps by another 3 dB. It is the 
abuse of compression that reduces intelligibility. Compression has been 
universally used in all broadcasting modes for at least 60 years, and 
for at least 40 years, for gain reductions of 30 dB or more! The joke 
among FM broadcast engineers in the '70s was "If the meter in the 
modulation monitor moves, the program director will say we're not loud 
enough!"

73, Jim K9YC






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