That is correct. However, it does have an external alert jack also. Thought I haven't tried it, I would assume that if a small speaker was attached to this jack, you would hear the alert tone.
I guess it's something I'm going to need to try out.
Bob
I wouldn't be surprised if that external jack is simply a switch, since the accessories are a light/strobe or siren I believe. So it would only serve as a trigger for the external device...
If the circuitry could handle it, I'm sure the radio could be modified so that the earphone jack doesn't disconnect the main speaker. You'd probably need some kind of impedance/resistance matching circuit.
I guess hearing the alert tone would be useful, but then you'd have to unplug the jack used for uploading so you could hear the alert, unless you went to WU or your webpage and listened to the streaming alert... which then begs the question, how close is the radio/computer to your bed?
Or look at the display to see what the alert was for...
Just idle musings...