February 7, 2021

Modulation and getting up close and personal with your mic.

by Tony WB6MIE & Earl WB6AMT

Tonight’s Tek Net is an expanded/ updated version of a previous one dated January 12, 2020.

I encourage you to follow the Facebook live feed tonight that will be running the entire time during the net so that you can see the difference in the different station’s audio levels. Tony will be available to answer questions during this time.

Here is the link to that Facebook live video stream from Tony WB6MIE.  https://www.facebook.com/tony.dinkel/

Note: You should send Tony a friends request to make sure that you can view the video

Tonight we will cover several myths that some folks have about modulation with sound technical and engineering facts.

Tonight’s moderators have a combined actual field experience in the commercial and broadcast communications field of over 100 years, take advantage of that fact tonight.

Those of you that feel you have this modulation thing down pat …..don’t go away, but participate in the discussion.

I strongly urge the newer users to FM communications to take some notes, and ask questions so that this information is completely understood.

Your going to see how and why it is so important for you to learn how to talk to your microphone in a way that will help you be more understood to the station on the other end of your contact.

Why and how proper transmitter deviation on an FM transmitter can mean the difference between you being heard and understood even in a weak or low signal quality condition.

#1 The difference between an AM signal and an FM


#2  What different modulation looks like on a scope.  


#4 Notice that the majority of audio is at 4khz Deviation.


#5 Wideband FM audio viewed on a service monitor.


Tonight’s audio stream file is courtesy of Dave W3QQQ