This sounds like a preposterous idea, but here it is anyway...
Apart from the new amateur radio hobby, my principle use of radios is to listen to 6IP (aka 6AR) and other fire channels. I've usually got a scanner in my bag at work during the fire season, and now I'm often taking in the 2m handheld too. I'd also like to use both (better) in my car...
Looking at the specs of various amateur radios, it seems that some handhelds (but I haven't spotted a "mobile" unit) can also receive around 78mhz which is where the fire channels I'm interested in reside. So I was considering getting one of those and in the car having it plugged into an external antenna to do double duty.
So my question is - if I had an antenna on the car that was tuned for both 2m (144mhz) and 70cm (440ish?), would it also perform OK for RX on 78mhz?
I totally understand if this is a "suck it and see" question, but in case someone has already tried it out, just thought I'd ask

Thanks all!
Meg