Crazy George wrote:

Richard:

You should be advised that modern semiconductor driven diesel injectors are noisier than Kettering ignition systems.
DIN and the rest of the European regulatory bunch have really clamped down on spark fired ignition noise, but apparently
Diesels have escaped their attention.

--
Crazy George

Only too true. When mobile I can hear Mpls buses about 100 feet away
over the S5 downtown noise on 20 meters. They make an interesting tone
pattern that I surmise may have to do with resonances in the various
lengths of the wiring harness involved. I've heard much the same from
some, but not all, diesel trucks.

tom
K0TAR