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Nov 10, 2011, 08:13 AM
New Beeeeee
RUBNorris's Avatar
I had that same prob. Kinda funny plug. Ibcrazy has them. $12 shipped save u some head ache
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Nov 10, 2011, 08:28 AM
Registered User
lrrps's Avatar
Quote:
Originally Posted by RUBNorris View Post
I had that same prob. Kinda funny plug. Ibcrazy has them. $12 shipped save u some head ache
Is it $12 shipped per adapter, I need 2.
Price must be higher to customers overseas.

Do you confirm this is the correct adapter, it's called RP SMA male / SMA female.

http://online.infracom-france.com/ad...a-femelle.html
Nov 10, 2011, 08:39 AM
Registered FPVer :)
markus123456's Avatar
Quote:
Originally Posted by lrrps View Post
Is it $12 shipped per adapter, I need 2.
Price must be higher to customers overseas.

Do you confirm this is the correct adapter, it's called RP SMA male / SMA female.

http://online.infracom-france.com/ad...a-femelle.html
It's an a bit unfortunate situation on 5.8Ghz as the so popular sky-rf based products come with SMA-RP where as most other products - especially on the other frequeny bands - use SMA. Personally I always ask people who order antennas from me what kind of transmitter/recivers they use to make sure the connectors they have match the antennas.

I'm obviousely not IBCrazy, but in an attempt to help him out (we all owe him something I think) and to avoid the dissadvantage of using adaptors, I offer you to send you a pair of CP/SPW antennas for your frequency of choice with the propper connectors for the pure shipping costs. Send me a PM if you are interested.

Markus
Nov 10, 2011, 08:56 AM
Registered User
lrrps's Avatar
Markus, thank you for the offer, PM sent.
Nov 10, 2011, 10:00 AM
New Beeeeee
RUBNorris's Avatar
For 2 it's 12 bucks to your door
Nov 13, 2011, 02:47 PM
Registered User
Hya,

I've got a pair of IBCrazy blue beams (cloverlead and skew planar) and love them.

Yesterday I had a very nasty nose dive crash and my antenna got a bit deformed. So, a few questions...

- You can see how the antenna has been deformed in the photos... is it OK to just approximately bend it back to about what its meant to be or does this need to be pretty accurate? It also seems that a bit of silver wire has been exposed (cycled in red) - issue?
- Also, the metal bits (the actual antenna) has been rusty since I got it (I rub a tissue on it and rust come out). I bought it from readymaderc... will this cause issues and is there anything I can do to protect them?
- Finally, if I can't really use this one any more, can I used the 4-lobe one (as I'm using a CP patch on the ground)

Thanks!
Nov 13, 2011, 05:05 PM
Registered FPVer :)
markus123456's Avatar
Quote:
Originally Posted by newandaddicted View Post
Hya,

I've got a pair of IBCrazy blue beams (cloverlead and skew planar) and love them.

Yesterday I had a very nasty nose dive crash and my antenna got a bit deformed. So, a few questions...

- You can see how the antenna has been deformed in the photos... is it OK to just approximately bend it back to about what its meant to be or does this need to be pretty accurate? It also seems that a bit of silver wire has been exposed (cycled in red) - issue?
- Also, the metal bits (the actual antenna) has been rusty since I got it (I rub a tissue on it and rust come out). I bought it from readymaderc... will this cause issues and is there anything I can do to protect them?
- Finally, if I can't really use this one any more, can I used the 4-lobe one (as I'm using a CP patch on the ground)

Thanks!
You can bend it back but by all means make a SERIOUS range test on the ground. If it works to the distance you intend to fly, it's ok. Otherwise it's not. That simple. The exposure of the ground mesh of the cable could be a serious problem. The antenna lobes being bent IS a problem. Wether you get it right or not is in a sense a matter of luck. If you get it almost right, it will work to some degree. Wether it's better than before or worse depends on how well the antenna was tuned and how well it ends up being tuned after you bend it. Chances that you bend it such that it is perfect are similar like winning the lottery. Not impossible, but not too likely. However, an untuned or not so well tuned antenna also works to some degree and this degree might be good enough for your personal flying style/needs. That's where the range test comes in.

Rust should not matter. Removing it may matters as chances are high you bend the wires. Depending on the frequency you operate on, bending a wire by a half milimeter in any direction can make a huge difference. The lower the frequency you operate on, the less critical this gets though.

You can use the four lobe (its called a skew planar wheel btw.). However, so far people report less range when using SPW antennas on the transmitter side. If this is true in your case or not again depends on the quality regarding the tuning of the very antenna you intend to use. So a genreal statement is difficult. But there is nothing wrong with trying as long as you verify with a ground range test that the range is good enough for how far you intend to fly out.

Markus

[EDIT] ,based on your second picture, your antennas are made for 2.4Ghz. So tolerances are a wee bit relaxed. Just try to bend it and make a ground range test to see if it works good enough for you[/EDIT]
Nov 14, 2011, 03:39 AM
Suspended Account
I'm going to attempt another antenna build. Maybe I'll get it right this time :/. Where should I position the vrx antenna? Is on top of my car ok?
Nov 14, 2011, 04:23 AM
Registered FPVer :)
markus123456's Avatar
Quote:
Originally Posted by chatch15117 View Post
I'm going to attempt another antenna build. Maybe I'll get it right this time :/. Where should I position the vrx antenna? Is on top of my car ok?
I think thats ok if you make sure to have some distance from the roof of the car. I would mount it at least 3 feet above the roof.

Markus
Nov 14, 2011, 05:41 AM
aka Nigel Uno

11.5km / 7.2 miles with two Cloverleafs (tx&rx)


@ 10.75km the image was ok
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@ 11.20km the image was still usable
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@ 11.50 the image was not usable

Setup:

vTx 1.2GHz 1500mW Sunsky with Cloverleaf

vRx 1.2GHz Sunsky with Cloverleaf

I think we can further optimize the setup to gain some more db (I think about 3 to 5 db) using better cables and connectors, using a Lawmate rx and so on.
Nov 14, 2011, 08:41 AM
Engineer for Christ
IBCrazy's Avatar
^ You beat my Omni record of 5 miles! Nice going. I think you now hold the Omni antenna World record. My hat is off to you

Did you build the antennas yourself or get them from a vendor?

-Alex
Nov 14, 2011, 09:05 AM
Why is the Rum gone?
sim_io's Avatar
Quote:
Originally Posted by IBCrazy View Post
^ You beat my Omni record of 5 miles! Nice going. I think you now hold the Omni antenna World record. My hat is off to you

Did you build the antennas yourself or get them from a vendor?

-Alex
My home made cloverleafs barely make it to 1.5miles. I'm using a 400mw 1.2Ghz, this is not normal right?

4 turn Helical + clover leaf shows degrading at 3 miles as well.
Nov 14, 2011, 09:18 AM
aka Nigel Uno
Quote:
Originally Posted by IBCrazy View Post
^ You beat my Omni record of 5 miles! Nice going. I think you now hold the Omni antenna World record. My hat is off to you

Did you build the antennas yourself or get them from a vendor?

-Alex
WoW!!!

Thank you very much for your congratulations!!!

The antennas are self-made by me.

Ciao
Nov 14, 2011, 10:02 AM
Engineer for Christ
IBCrazy's Avatar
Quote:
Originally Posted by sim_io View Post
My home made cloverleafs barely make it to 1.5miles. I'm using a 400mw 1.2Ghz, this is not normal right?

4 turn Helical + clover leaf shows degrading at 3 miles as well.
That's plenty normal. Long range on omnis has a lot to do with RF conditions. I usually make it about 2-3 miles before I get grainy image. I'm in the middle of nowhere though.

-Alex
Nov 14, 2011, 10:09 AM
Why is the Rum gone?
sim_io's Avatar
Quote:
Originally Posted by IBCrazy View Post
That's plenty normal. Long range on omnis has a lot to do with RF conditions. I usually make it about 2-3 miles before I get grainy image. I'm in the middle of nowhere though.

-Alex
Yup that makes a lot of sense. I fly around a well dense populated area. I feel as if your well tuned IBcrazy dipole and tuned patch got more range 3 miles and still no sign of degradation. My question; is vertical/horizontal polarization better for long range on an high RF noise area than circular? I imagine a circular receiver looks at all kinds of RF reflections rather than a strict vertical polarization setup.


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