Hi everybody, I have basic knowledge about electronics. And I've used
diversity reception items before (2 of my cars have it, I've also used
wlreless mics with it in the PA market). Anyway, the 2 cars in
question are a 97 Nissan Maxima and a 98 Chevy Corvette. The maxima's
is fairly straight forwards, it uses one mast, one in the glass. The
antenna connector on the OEM radio is a double plug style. When I
used to have an aftermarket unit in there, I just bought an adaptor
and plugged it to the mast antenna as it seemed to work better most of
the time. Obviously here, all the processing, switching etc gets done
inside the OEM headunit.

Now, heres the car I'm working on now. The 98 Corvette has 2 in the
glass antennas. The wires go into a seperate box thats behind the
drivers seat sorta on the B pillar. This is obviously the switcher
box, as theres also a plug that appears to go back to the OEM radio.
I of course have lost this OEM radio long ago and put in an
aftermarket. but the reception has been notably poor. This is most
likely because there is no 'feedback' which is probably done inside
that OEM headunit which isnt there anymore.

Even with the OEM headunit, when I'd turn on the rear defrost the
radio would go to static. I attribute this to something wrong with
either the box or grounding or something along those lines.
Also interesteing is that the 2 'inputs' of that box are the standard
motorola style plug, where as the output is then the GM mini plug.

I have not tried anything yet, but I plan to bypass this box
completely, by just getting a antenna extension and directly plugging
it into either the front or the rear antenna. I'm crossing my fingers
big time to see if it does better then what I got now. I know that
simply wiring them in parallel is a no no.

Heres my question, does anybody make (or have a project kit) that can
give me the diversity reception back? I have searched the groups and
the net and have come up with very limited information. I know delphi
(the maker of the OEM antenna system in the corvette) has some stuff
but it is unclear if thats OEM stuff or aftermarket stuff.