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raalst

New One, With The Usual Bunch Of Questions

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Hi all,

Very inspiring forum !

I build R/C submarines for a hobby. currently I am building a slightly larger model, with room for

a camera.

My video problem is, that I need the TX antenna up in the periscope (always above the water) and

the TX itself in the sub's (hopefully B) ) dry compartment.

I have a reasonable knowledge of electronics, but RF is not included in that.

are there any succesful examples of how to take the antenna off a 2,4 Ghz TX

and put a cable inbetween ?

is it enough to solder a bit of coax inbetween ? probably not.

could I leave out the shielding as the cable is in the water ?

I *do* know that 2,4 Ghz will not penetrate the water at all.

I'm still in planning phase. one decision I need to make is whether to take video and another setup

for telemetry, or should I just go for a embedded linux with a wifi connection to shore.

any opinions on that choice ?

Please enlighten me,

especially about the antenna question. Links are also very welcome, I'm not afraid to

get into gory details every now and then....

Ps interested in my hobby ? see http://www.subcommittee.com, we're about a thousand strong worldwide.

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My video problem is, that I need the TX antenna up in the periscope (always above the water) and

the TX itself in the sub's (hopefully ) dry compartment.

That sounds ok to me, the only worry would be if it went under the water as it may mess up the SWR to the point that the TX is damaged.

Your best bet is to solder some thin co-ax to the TX and make a simple co-ax dipole by folding the brade back down over the outer cover. There is info on this somewhere if anyone knows where to find it ?

Terry

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There is info on this somewhere if anyone knows where to find it ?

The coaxial antenna is described on the rc-cam4 project page.

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