[R-390] Positive ground (slightly off topic)

Mon, 2 Sep 2002 14:19:20 -0700

How about coupling with large value capacitors (0.005, 0.01 mfd)?   Transmit
Mica caps should do the trick.  You should also "ground" your rig with
similar caps.  I am assuming your rig is insulated from the automobile
chassis due to reverse polarity (positive ground).

73 de Bill, AB6MT
[email protected]

----- Original Message -----
From: "AI2Q Alex" <[email protected]>
To: "R-390 (E-mail)" <[email protected]>
Sent: Monday, September 02, 2002 1:50 PM
Subject: [R-390] Positive ground (slightly off topic)

> Hello all:
>
> Given the pool of technical knowledge on this list, I wonder if anyone can
> suggest a way to feed a typical HF mobile whip antenna (center loaded,
with
> low-Z feedpoint) in an installation where the car's electrical system uses
a
> positive ground.
>
> I tried feeding a Hustler whip through a homemade toroidal coupling
> transformer in order to achieve DC isolation, but my transformer seems
> inadequate to achieve adequate coupling. I'm not interested in reversing
the
> vintage car's system polarity. The transceiver is an Atlas-210X.
>
> Any thoughts?
>
> Vy 73, AI2Q, Alex   .-.-.
>
>
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