Aerial on 94 GQ

[the evil twin]

The idea was, you can put the aerial down in the bush so you don't break it off on the first tree branch you go past.

Yep, I'm aware of that. The OP wanted to know about the power antenna with the power off altogether to the Head Unit tho. As I said it's been a while but I'm pretty sure my antenna on my 94 RX would retract if I turned the Head Unit off. Been a few years now since I sold the truck tho so not 100% sure I'll admit

For some reason mine does'nt even have an antenna... maybe the radio catches the signal through my cb radio antenna..

You'll know if thats the case because every time you transmit on the CB smoke will billow out of the Head Unit as the CB pumps 5 watts of RF into the input stages of the radio without a splitter.

It's doable but the wiring, splitters and filtering make it impractical IMHO.