Quote:
Originally Posted by box23
Could you clarify which one is which, please?
Also, I just remembered, this summer when the Hell's Angels were in town, I heard Carlton dispatch on 154.98. I can't remember if it was simplex or repeated. I heard someone new on the frequency and looked it up to find it was licensed to Carlton. As I listened more, it sounded like it was being used as an alternate dispatch frequency since it was so busy.
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I only have a basic understanding, so my explanation is not even close to what a truly knowledgeable person could give you. That being said, here goes:
Simplex is only one side of a two way conversation, is usually low powered, and may (or may not) be repeated from an "in vehicle" repeater, which is a very low powered transmission. It is designed to work like the old VHF systems without bleeding into other "close" communities that have a frequency in use that may be close to the one being used.
Repeated duplex (du = dual) is both sides of the conversation, and is usually repeated for one tower to the next within a larger coverage area using more power.
Therefore, if you hear a signal that is quiet or just one side of a conversation, it is likely a "simplex" channel.
I'm sure I will get lambasted by a knowledgeable person for my very basic explanation that is probably full of incorrect or variable facts, but thats the best I can do.
MM