FWIW Department: Some years ago at the Livermore CA monthly swap meet
another Ham started up his Prius while I was walking by with an FT-817
with MP-1 attached on 40 CW. There was a distinct whining noise whose
sound ros einfurency as the wheels began to turn and he moved off. No
surprise; lots of amps being switched for those motors.
As I said, FWIW. Maybe I should haul out an active monopole (if mine
still works) and an analyzer to see what one looks like in "real life"
and not just here on the List.
Cortland
KA5S
On 4/11/2012 0025, Larry Benko wrote:
> Let's do the math for all to see.
>
> Assuming a 9dB increase in signal for every halving in distance and
> using your number of 1800'. Then there would be a 9dB increase in
> interference @ 900', 18dB @ 450', 27dB @ 225', 36dB @ 112', 45dB @ 56',
> 54dB @28' etc. In the near field the noise increases even faster. This
> does NOT pass the reasonableness test in my opinion. Perhaps you were
> hearing something else or that maybe there was something wrong with the
> vehicle but this is no where close to what I have seen.
>
> I have made over 70,000 mobile contacts and have driven by many hybrid
> cars on deserted roads in the western US activating counties and have
> heard noise occasionally from hybrid cars but never at the level you
> indicate. By far the worst noise offenders on the roads are the noisy
> AC inverters that a lot of truckers use but I have never heard one of
> those at distances like 1800'. So I guess we have a difference of opinion!
>
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