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

[Tony Farrow]

And to avoid upsetting the Mark 1 eyeballs it is always a good idea from the
RF safety perspective to consider mounting antennas on the roof or rear of
the car.

Good luck & cheers,

Tony VK2AJF

2008/12/19 Michael Carey <michaelcarey at internode.on.net>

> Hi,
> This site, http://www.k0bg.com/ has all sorts of great info on mobile
> amateur operation. Take a look through the bonding and grounds sections. You
> will also see some photos of my mobile installation in the photo gallery!
> Make sure you are using material 31 ferrite cores. These have the best
> performance on HF frequencies. If you don't know that you have material 31
> ferrite cores, assume you don't and get your hands on some, they work
> wonders with RF current flowing where you don't want it!
> As Ray has said, changing the path of the coax will have little if no
> impact on any interference caused to or from a radio installation.
> Also make sure you aren't over modulating your transmit signal. This can
> create a lot of distortion. Clipping SSB can cause all sorts of weird things
> to happen.
> Michael.
> VK5ZEA
>
>
>
> 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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>>
>>
>
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