Arthur Kelly writes:
>When I tried, in '91, to install my current AM/FM/Cassette radio I had
some
>difficulty. When I called JVC to see if they could give me a "quick fix "
>they wouldn't even discuss it. Their engineer told me that the radio was
for
>negative ground and that they would take no responsibility if I altered it
>for use with pos gnd. He also said that he was prohibited from telling me
>how to alter some of the circuitry inside the radio. I bought an inverter
>for the radio circuit and that, in effect, fooled the radio into thinking
>that the car was negative ground. That inverter burned out last month.
When I was in college (in the 70's) I drove a 65 MGB with positive ground.
I
built an FM radio from Heathkit which was negative ground. I mounted the
radio on a piece of masonite to isolate the chassis. I also capacitor
coupled
the antenna connection. It worked OK but I ruined the SWR on the antenna
and
the radio had terrible reception in fringe areas.
I later converted to negative ground and improved things on all fronts.
Changing
polarity is even easier when the car has no ammeter (which the MGB did
not).
I have since reformed my ways and moved up to Triumphs.
Dave Massey
|