Re: re Re: Q: 97 A4 Rear Window Defroster

[Elliott Potter <epotter@abraxis.com>]

At least in the '93-'95 90's, there are two amplifiers--the one for the
top three lines, which do not defrost, but pick up AM/FM, and another
one for the rest of the rear window, which does defrost, but picks up
only FM.  Not sure why they break it up like this; maybe the defroster
interferes with the AM reception?  Or perhaps the top three lines are
made of a different material to get better reception.
--
Elliott

"Smith, Kirby A" wrote:
> 
> Elliott Potter <epotter@abraxis.com> wrote:
> 
> Yea; the top the lines are for AM/FM reception...the rest of the
> defogger (or perhaps that's what the two vertical lines are?) are also a
> separate FM-only antenna.
> --------------------------
> I can't address the A4, but want to point out that on the 1988-91 80/90s,
> the rear defroster is the antenna, and a filter/amplifier box in the drivers
> D pillar separates the dc for defrosting from the ac for the radio.  Thus,
> it is not _necessary_ that they be separate traces.
> 
>                 .... Kirby   (Kirby A. Smith)
>                               2 x 1988 90q
>                           New Hampshire USA