All tests are performed in Carrier Squelch mode on all radios without any sub-audible tone or digital squelch involved.
Scenario 1: The Baofeng handheld radio Keys up. Another Baofeng is listening. When the transmitting Baofeng un-keys, the receiving baofeng does not hear any squelch tail, and has a smooth un-key.
Scenario 2: The Baofeng handheld radio Keys up. A different brand radio is used to receive. When the Baofeng un-keys, the squelch tail is heard through the speaker of the other radio. I have tested this on Kenwood, Alinco, and ICOM.
Scenario 3: A different brand radio keys up. The Baofeng is listening. When the radio un-keys, I hear the squelch tail through the Baofeng speaker.
What is it that Baofeng uses to eliminate squelch tails on the radios where no other brand inhibits this property?
I have confirmed it is NOT chicken burst (ending the PL tone early) , or reverse burst (phasing the PL tone 180 degrees) , and there is something special about the Baofeng radio's "End-Of-Transmission" squelch tail eliminator.