"Dave Plowman (News)" wrote in message
...
In article ,

Clive wrote:

I think nearly all interference was caused by car ignition systems which
would have been positive going, but modern cars don't use distributors
any more so the biggest source of interference has gone anyway.

Was the dizzy more of a source than the plugs themselves?

All other things being equal, the wires presented the largest source.

Current tech puts the coils right by the spark plugs, and typically buries
them in the heads. Thus the plug wires only see the far lower primary
voltages.