^If it can be soldered it will work fine.

Hey guys. So I finished by antennas this weekend. I'm pretty exited to test them out.

Can you please have a look at the pics and confirm if I got the polarization right? I think I built LHCP.



Thanks

A tapered microstrip! Beautiful! That's my favorite matching stub. Everything looks great.

-Alex

hey guys sorry to sound a proper idiot, i plan on buying a helical and wondering the best position for it, vertical, horizontal or what, i plan to use a CL with it
cheers
carl

doggit,
Helical's have to be pointed at the aircraft or other transmitter.

Chris

Originally Posted by doggit

hey guys sorry to sound a proper idiot, i plan on buying a helical and wondering the best position for it, vertical, horizontal or what, i plan to use a CL with it
cheers
carl

Think of the helical as a gun, firing the signal out of the barrel,
vertical/horizontal is no longer a problem with circular polarisation - like a rifle bullet the signal spins.
Mike

hello all check out the david (rcexplorer) inspired 5.8 helical antenna . i have attached the 3d pdf . im also designing a 6 tune for when i need real punch .

also check out www.jamiedco.com

Originally Posted by jamiedco

hello all check out the david (rcexplorer) inspired 5.8 helical antenna . i have attached the 3d pdf . im also designing a 6 tune for when i need real punch .

also check out www.jamiedco.com

Very pretty, but fact free.
It would be a good idea to start a thread about it, where you can give dimensional drawings, build log, performance figures etc.
I don't think IBCrazy will be too happy to share his thread,
(I could be wrong, you might have already got his permission to post progress here).
Mike

i will be starting a thread but its in the design phase at the moment . i will link the thread once im a bit down the way with the construction of it . i will also share the templates and my experiences .

Originally Posted by jamiedco

hello all check out the david (rcexplorer) inspired 5.8 helical antenna . i have attached the 3d pdf . im also designing a 6 tune for when i need real punch .

also check out www.jamiedco.com

That design is pretty good structurally. It fixes the breakage problem in shipment and transport. However the construction of that is much more difficult. For a DIYer, the only real gain is the look of the antenna. The performance is going to be exactly the same as the support is not part of the radiating structure.

-Alex

Subscribed.

Thoughts of a 5.8g 10 turn Helical inside one of those skinny energy drink cans as a directional antenna for finding your lost plane if the video is still transmitting?

Originally Posted by doonunder

Thoughts of a 5.8g 10 turn Helical inside one of those skinny energy drink cans as a directional antenna for finding your lost plane if the video is still transmitting?

You can supress sidelobes, but I would not do that with a full can. A border half an inch high around the reflector should do better.

Markus

Originally Posted by markus123456

You can supress sidelobes, but I would not do that with a full can. A border half an inch high around the reflector should do better.

Markus

Thanks Markus, I am thinking it would not be that directional within the last couple of hundred mtrs whatever we do though?

Originally Posted by doonunder

Thanks Markus, I am thinking it would not be that directional within the last couple of hundred mtrs whatever we do though?

If you have a way to monitor the RSSI value, you should see a clear difference.

Markus