>When was the change from positive to negative ground?
Changed to Positive ground in 1965 with the SPL311.
>I believe the amp was moved into the radio itself sometime in 1964
I have never used my AM radio in my 65 SPL310....but I think it has the
seperate amp.
Dan Zubkoff
1965 SPL310
San Mateo, Ca
>From: "Shifty" <shifty@well.com>
>Reply-To: "Shifty" <shifty@well.com>
>To: roadsters <datsun-roadsters@autox.team.net>
>Subject: Re: 1964 Speaker
>Date: Tue, 12 Oct 1999 16:51:51 -0800
>
>I believe the amp was moved into the radio itself sometime in 1964. I have
>the amp in the speaker box in my '64 1500 (SPL310-01587), but also have a
>radio from a '64 style radio console that has the amp in the radio. (Big
>power transistors in the back.)
>
>When was the change from positive to negative ground?
>
>Leigh Brooks
>San Francisco
>
>----------
> >From: "sidney raper" <spl310@hotmail.com>
> >To: jroach@qualcomm.com, jblair@roseville.ca.us,
>datsun-roadsters@autox.team.net
> >Subject: Re: 1964 Speaker
> >Date: Tue, Oct 12, 1999, 2:19 PM
> >
>
> > All,
> >
> > I have a couple of these beasts. I have one of the speakers out, and
>oddly
> > enough there appears to be some kind of amp built into it. I do not
>think
> > that a 6x9 replacement would suffice as a result. I had a later
>roadster
> > (67) and it did not have the amp. I think that they deleted that when
>they
> > went to negative ground. Since my car is not driving yet, I cannot give
>you
> > the final answer.
> >
> > Sid
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