Porsche CR-31 GAL signal?

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cyberzl1@yahoo.com - 11 Apr 2006 18:35 GMT

I came across a Porsche CR-31 radio that has a GAL(speed dependent
volume) input.

What must be input to make this function correctly? 0-5Vdc, PWM,
0-Vign, or ....

It would be nice to have speed dependent volume in my car. I'm not too
worried about "hacking" it. The radio I have is already aftermarket(I
really dont' care). I only listen to FM.

The only reference I have been able to find suggested hooking it to the
speedometer signal. Having no idea what the speedo in a Porsche gets
for a signal this is only mildly informational.

Anyone know?

Thanks

Jeridiah

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jcr - 12 Apr 2006 00:32 GMT

> On 4/11/2006 1:35 PM ... cyberzl1@yahoo.com wrote:
> I came across a Porsche CR-31 radio that has a GAL(speed dependent
[quoted text clipped - 16 lines]
>
> Jeridiah

I've owned a car with speed adjusted volume. It's not worth the
trouble. Forget it.

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cyberzl1@yahoo.com - 12 Apr 2006 13:59 GMT

> > On 4/11/2006 1:35 PM ... cyberzl1@yahoo.com wrote:
> > I came across a Porsche CR-31 radio that has a GAL(speed dependent
[quoted text clipped - 19 lines]
> I've owned a car with speed adjusted volume. It's not worth the
> trouble. Forget it.

Actually, I was thinking about putting steering wheel controls in to
control the signal if I could figure out what I need to input. Speed
based volume control might be nice too.

I have rented a few cars with it, and I thought it was sort of neat.
But the remote controls would be the best part. The radio is not in
what I would consider a convenient location in my car(down low and
ahead of the shifter).

JW

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