Please Control The ALC!

This is how a bad case of splatter looks like in JT9 waterfall.

There is very simple solution for this. I have been educating this to everyone who I have introduced to digital modes.

Step 1: If you have option in your rig to turn ALC (Audio Level Compression) off please do so for ALL digital modes!

Step 2: If you can not turn ALC off you need to set the audio level low enough for ALC not activating and power still going out to the antenna system.

I have found that easiest way to control ALC is with the option: MIC GAIN in my rigs.

This is how perfectly set mic gain looks on the ALC and Power meter:

About 20 watt going out, Zero ALC activation. You need to explore what is correct mic gain for your audio level.

Here is the same for Yaesu 1000mp.

 

You can see no ALC activation on the ALC meter.

Please clean up your signals!

 

Toni oh3t