Simply tap off at the junction of the two batteries. The truck series two 12
volt batteries to give you 24. Find the the junction where the plus of one
is tied to the minus of the next. Tap off a wire at this point. I would fuse
it at the connection point. This will provide the necessary voltage for the
radio.

CAUTION! I have made the assumption that your truck has the chassis tied to
the negative side of the first battery. In the event you have a positive
ground truck let me know and I will tell you how to get around that problem.

"Stephen Parry" wrote in message
...
On Thu, 18 Aug 2005 12:35:38 -0400, "Fred W4JLE"
wrote:
Fred I think you must be Psychic!
current system is all 24V, yesterday went out and paid £35.00 for a
DC/DC dropper so I could fit a car radio... are you saying that this
will make things worse?
One problem you might look at aside from all the other great suggestions
is
to look at how your radio voltage is derived. Most trucks are 24 volt and
the radios 12 volt.

Are you tapping at the junction of the two twelve volt batteries or does
your truck use a 24 to 12 volt converter? These are usually really noisy
from an electrical standpoint.

"Stephen Parry" wrote in message
.. .
Hi folks, first let me apologise for not lurking, or even reading a
FAQ (I did look and did not find). I know that radio amateurs are a
helpful and friendly bunch, so here goes.
From the UK, for historical reasons, the BBC broadcasts programmes on
Long wave, specifically 1500 metres (198 Khz???). I drive a truck on
the continent of Europe, and would love to listen to this service
whilst on the road (for the cricket!). I know that the signal is
there, and of sufficient strength, as I can receive it OUTSIDE the
truck on an ancient "portable" Inside the steel box (cab) however, too
much noise/too little signal to be useful. The fitted radio has LW,
but again cannot be used for the noise. Could anyone please point me
to some answers to the following:
Antennae: Could I build (buy) some kind of antenna specifically to
receive this emission?
(My old radio has a socket labelled "AM antenna").
Could I build a receiver tuned only to this freq., with no need for a
speaker (run the sound in at headphone type power) that I could
hang/bolt outside the truck (on the roof?), with its own battery and
aerial? If so could someone point me to a diagram of such a beastie?