Power line adaptors

In article , Brian Gaff
wrote:
One problem some hams are having is that new cars are using the wiring
harness as a data bus.

One death as a result of a car going out of control in response to signals
from a radio ham will settle the matter of responsibility for radio
interference once and for all.

Rod.
--
Virtual Access V6.3 free usenet/email software from
http://sourceforge.net/projects/virtual-access/

In article en.co.uk,
Roderick Stewart wrote:
In article , Brian Gaff
wrote:
One problem some hams are having is that new cars are using the wiring
harness as a data bus.

One death as a result of a car going out of control in response to
signals from a radio ham will settle the matter of responsibility for
radio interference once and for all.

Going back 30+ years, there was a spate of cars stopping on the M1 near
Daventry since their DIY electronic ignition systems were sufffering from
the nearby HF broadcast transmitters - it lead to headlines in the Daily
Mirror.

--
From KT24

Using a RISC OS computer running v5.11

In article en.co.uk,
Roderick Stewart scribeth
thus
In article , Brian Gaff
wrote:
One problem some hams are having is that new cars are using the wiring
harness as a data bus.

One death as a result of a car going out of control in response to signals
from a radio ham will settle the matter of responsibility for radio
interference once and for all.

Rod.

You think so?, ever heard of EMC suppression in vehicles etc?..
--
Tony Sayer

In message , charles
writes
In article en.co.uk,
Roderick Stewart wrote:
In article , Brian Gaff
wrote:
One problem some hams are having is that new cars are using the wiring
harness as a data bus.

One death as a result of a car going out of control in response to
signals from a radio ham will settle the matter of responsibility for
radio interference once and for all.

Going back 30+ years, there was a spate of cars stopping on the M1 near
Daventry since their DIY electronic ignition systems were sufffering from
the nearby HF broadcast transmitters - it lead to headlines in the Daily
Mirror.

According to the owner's handbook, my last company car - a New Astra 1.7
diesel - was rated at '10W of RF on any frequency' (position of the
aerial or field strength not stated). I reckoned that this was probably
a figure plucked out of the air.

Some years ago, in various cars, I used to run 30W on 145MHz. However, I
never actually transmitted from the Astra, and therefore didn't find out
if there were any ill-effects.

With a Focus I had, the only ill-effect was that the left indicator
(when activated) would flash at about three times normal speed.

Elementary testing and proofing against 'reasonable' levels of RF isn't
rocket science. All it needs is for the manufacturer to do it.
--
Ian

In article , Ian Jackson ianREMOVET
scribeth thus
In message , charles
writes
In article en.co.uk,
Roderick Stewart wrote:
In article , Brian Gaff
wrote:
One problem some hams are having is that new cars are using the wiring
harness as a data bus.

One death as a result of a car going out of control in response to
signals from a radio ham will settle the matter of responsibility for
radio interference once and for all.

Going back 30+ years, there was a spate of cars stopping on the M1 near
Daventry since their DIY electronic ignition systems were sufffering from
the nearby HF broadcast transmitters - it lead to headlines in the Daily
Mirror.

According to the owner's handbook, my last company car - a New Astra 1.7
diesel - was rated at '10W of RF on any frequency' (position of the
aerial or field strength not stated). I reckoned that this was probably
a figure plucked out of the air.

No they spend a lot of money on EMC testing and compatibility these
days.. There are European standards which are quite specific..


Some years ago, in various cars, I used to run 30W on 145MHz. However, I
never actually transmitted from the Astra, and therefore didn't find out
if there were any ill-effects.

Wouldn't expect there to be any..


With a Focus I had, the only ill-effect was that the left indicator
(when activated) would flash at about three times normal speed.

Older vehicles were very susceptible!..

Elementary testing and proofing against 'reasonable' levels of RF isn't
rocket science. All it needs is for the manufacturer to do it.

To be forced to do it rather they won't spend in what they don't have
to...
--
Tony Sayer

On Jan 15, 8:56*am, tony sayer wrote:
In article , Ian Jackson ianREMOVET
With a Focus I had, the only ill-effect was that the left indicator
(when activated) would flash at about three times normal speed.

Older vehicles were very susceptible!..

I had a van that did that when I used my 25W CB. I wonder why, since
there were no electronics involved, except a very simple 'flasher
unit'.

Bill

In article
s.com, scribeth thus
On Jan 15, 8:56*am, tony sayer wrote:
In article , Ian Jackson ianREMOVET
With a Focus I had, the only ill-effect was that the left indicator
(when activated) would flash at about three times normal speed.

Older vehicles were very susceptible!..

I had a van that did that when I used my 25W CB. I wonder why, since
there were no electronics involved, except a very simple 'flasher
unit'.

Bill

Prolly got a transistor in there somewhere. This was usually the
problem the base emitter junction acting as a demodulator/ rectifier
unless bypassed with a capacitor etc...

The old police Volvo 144 cars used to slow down when old bill keyed up
his radio..
--
Tony Sayer

In message , tony sayer
writes
In article
s.com, scribeth thus
On Jan 15, 8:56*am, tony sayer wrote:
In article , Ian Jackson ianREMOVET
With a Focus I had, the only ill-effect was that the left indicator
(when activated) would flash at about three times normal speed.

Older vehicles were very susceptible!..

I had a van that did that when I used my 25W CB. I wonder why, since
there were no electronics involved, except a very simple 'flasher
unit'.

Bill

Prolly got a transistor in there somewhere. This was usually the
problem the base emitter junction acting as a demodulator/ rectifier
unless bypassed with a capacitor etc...

The old police Volvo 144 cars used to slow down when old bill keyed up
his radio..

In the mid-1960s, I made a simple electronic thingy for the winkers of
my Austin A40 (variable delay between sweeps). It was basically just
multivibrator driving a relay, and worked wonderfully.

I was just about to drill a hole in the dashboard for the control pot,
when I decided to try it with the engine running. It just went berserk -
switching at random (almost certainly due to rubbish on the 12V supply
line). I shelved it for a while.

Ever so often, while rummaging, I come across it. However, I think I
have lost faith in electronics, and somehow I feel that it might never
get installed.
--
Ian

In article en.co.uk,
Roderick Stewart wrote:

One death as a result of a car going out of control in response to signals
from a radio ham will settle the matter of responsibility for radio
interference once and for all.

Obviously the car manufacturer would be responsible. and would
suffer enormous damage. Who would buy a car that might kill you
if you drove near an RF source?

-- Richard
--
Please remember to mention me / in tapes you leave behind.

In article , Richard Tobin
scribeth thus
In article en.co.uk,
Roderick Stewart wrote:

One death as a result of a car going out of control in response to signals
from a radio ham will settle the matter of responsibility for radio
interference once and for all.

Obviously the car manufacturer would be responsible. and would
suffer enormous damage. Who would buy a car that might kill you
if you drove near an RF source?

-- Richard


And in practice who would know and how would you and could you prove
it?...
--
Tony Sayer