[BC] Google, today Hertz

[Ronald J. Dot'o Sr.]

If I recall correctly most cars had 6 V Pos ground systems thru 1955.  Ford 
went to 12 V Neg ground in 1956.  A lot of semi tractors still had Neg 
ground systems in the 1060's when I was installing Motorola Motracs in them 
which were provided with a special internal plug which would make the Motrac 
work on either Pos or Neg ground.

Ron D

----- Original Message ----- 
From: "Thomas G. Osenkowsky" <tosenkowsky at prodigy.net>

> The old VW bugs had 6V positive ground, IIRC. The Continental PDM
> transmitters had a 0VDC plate voltage with the cathode at negative 
> thousands
> of volts. Got around the Harris patent. Control grid voltage on tubes also
> have a negative voltage referenced to cathode.
>
> Tom Osenkowsky, CPBE
>
>> Oh? Do you still consider Positive to be Ground? :)
>>>You have to, when dealing with the electrical systems in some cars!!! :)
> :)
>