Jump to content
ThomasScherrer

how to kill an EM406 GPS module

Recommended Posts

I have been using an EM406A in my car for tomtom navigation for a while now,

and I am really happy with it.

last weekend I visited a radioamateur, used the GPS to get there, all was fine.

we spend a few hr in the radio shack, only on 20 meters 14MHz band,

made a few contacts arround the globe.

later when I wanted to go home, the GPS was dead.

after closer inspection the receiver LNA device part was killed by the powerfull HF signals.

the transmitter antenna was located 15meters from the parking lot,

and TX power was 2500 Watt output to the antenna, modulaton SSB.

so be carefull when flying too close to powerfull transmitters.

Edited by ThomasScherrer

Share this post


Link to post
Share on other sites

Thanks for the valuable tip Thomas! :lol: I had no idea that was possible :o

JMS

Share this post


Link to post
Share on other sites

2500W.. you could have a wireless fluorescent lamp with that! I'm not even surprised :P

Share this post


Link to post
Share on other sites
With that kind of power I'd be worried about my fertility.. not my GPS :) :) :)

:lol::lol::lol::lol::lol: LOL :lol::lol::lol::lol:

Share this post


Link to post
Share on other sites

>worried about my fertility

not me ! a nice doctor fixed me a month ago.

I have 5 kids now, so no need for me to have anymore of them cute things.

Share this post


Link to post
Share on other sites
>worried about my fertility

not me ! a nice doctor fixed me a month ago.

I have 5 kids now, so no need for me to have anymore of them cute things.

5 KIDS?!?! :o Wow how do you manage? I stopped at number 2 :lol: Anymore of those cute things I will have to stand in front of a HF transmission tower with my hands at my hips and close my eyes! I hate doctors :lol:

Share this post


Link to post
Share on other sites

>how do you manage?

to get 5 kids ? well I guess almost same procedure as the way you got your two,

I know it is gross, but someone has to do it.

Share this post


Link to post
Share on other sites

Automotive stuff is HEAVILY shielded / isolated etc...

Shouldn't have to worry too much about this...

Mobile phones?

Share this post


Link to post
Share on other sites
Automotive stuff is HEAVILY shielded / isolated etc...

Shouldn't have to worry too much about this...

Hey have you driven the new Range Rover yet? Oh wait.... they just stop on their own after leaving the lot. :lol::lol::lol:

Share this post


Link to post
Share on other sites

we used my wife's car that day, electronic power steering, ABS and airbags,

lucky us, it all worked fine !

imagine driving directly passing a huge TV transmitter tower, and your car fails ?!?

they are aware about the possible problems in new cars.

but in old cars: I have seen several problems, blinker relays that go 20 times faster when I transmit with a small handheld radio,

simply add a 100pF capacitor the right place stoped the problem.

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now

×