[OZAPRS] HF APRS upsets the car's climate control

Ian Bennett ibennett at tpg.com.au
Wed Dec 17 12:28:42 EST 2008


Fair call.
Tony: Give Ray's suggestion a try.

On Wed, 17 Dec 2008 11:47:48 Ray Wells wrote:
> You have an antenna radiating lots of RF just a few feet from the
> vehicle wiring and you're concerned about the coax radiating? Really?
>
> Assuming you still consider it to be a possibility, replace the antenna
> with a dummy load and see what happens.
>
> Ray vk2tv
>
> Ian Bennett wrote:
> > Check earth connections. Is the radio earthed to the vehicle separately
> > to power?? Is the bullbar "electrically connected" to the vehicle body??
> > What coax are you using?? You may need to reroute the coax to
> > avoid "sensitive" areas (assuming your coax is radiating of course).
> >
> > Ian
> >
> > On Wed, 17 Dec 2008 09:05:47 Tony King wrote:
> >> Hi Tim and others,
> >> I have a similar and more serious problem with 2m getting into the
> >> cruise control in my Jackeroo 2000 model diesel.
> >>
> >> If the cruise control is activated and I am talking on 2m none of the
> >> normal options will deactivate the cruise control until I let go of the
> >> ptt on the tx. First time it happened I nearly ran into the car in front
> >> of me because I couldn't disengage the cruise control to pull up.
> >> Similarly to Tim, my antenna is on the bull bar.
> >>
> >> By the way if any one saw vk3ekg-9 behaving strangely  over the last
> >> couple of days it was me, unfortunately. I was testing out some gear on
> >> the bench running into a dummy load. I had an old garmin 72 in
> >> simulation mode providing signals into the tnc and computer, but I
> >> didn't realise that with the lid off the Tx there was just enough signal
> >> getting out to get into the local repeater.  You may have noticed
> >> VK3EKG-9 travelling at up to 1800 km/h at 140 feet altitude in all sorts
> >> of random directions . Sorry if any one was upset or confused.....
> >>
> >>
> >> I have implemented the shapes function in UIview 32 and it works ok. I
> >> just followed the instructions in the UIview help file and those
> >> provided on the link that Ray VK2TV provided
> >>
> >> Regards Tony VK3API
> >>
> >> Tim Ahpee wrote:
> >>> G'day Folks,
> >>>
> >>> I've just got HF APRS running in preparation for my trip at the end of
> >>> the year and have come across an interesting one. Each time the rig
> >>> transmits the fan in the climate control goes to full power. Nothing
> >>> else seems to be affected just the fan. It was a bit of a shock the
> >>> first time it happened. I was driving along and heard the TX relays go
> >>> click then I was blasted in the face with air.
> >>>
> >>> Details:
> >>> Rig: Icom IC-7000
> >>> Car: Toyota Prado 2008 Diesel
> >>> Antenna: Diamond HF30FX mounted on the bull bar
> >>>
> >>> Any thoughts? I'm wondering if the RF is getting straight into the
> >>> motor controller for the fan because if the fan is off nothing happens.
> >>>
> >>> Cheers,
> >>> Tim
> >>> VK3TZA
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> >>> http://aprs.net.au/mailman/listinfo/ozaprs
> >>>
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> >>
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