I've got a JVC KD SH-99 and mine does the same thing. Now my cheap ass Sony unit I had before this had the extra lead that allowed the Antenna to only go up when the radio was switched on.

Biuying a more expensive deck isn't the problem. It's apparently a JVC thing and I think my deck does not qualify as "cheap"

Money doesn't always bring happiness. People with ten million dollars are no happier than people with nine million dollars ~ Hobart Brown