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Old Apr 19, 2012, 01:55 AM
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Joined Apr 2012
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Help!
Newbie needs your opinion about equipment and antennas

Hi to all!
Since a couple of months Im reading about FPVing and now Id like to set up a FPV plane. Im flying rc-planes for more than 20 years now and tried to get some knowledge out of the forums and articles about fpv. I visited some online shops and here is my "like to have-equipment":

Rc-TX and RX: The Thomas Scherrer LRS
http://www.electronicarc.com/catalog...130cd668edca25

Receiver
http://www.electronicarc.com/catalog...130cd668edca25


For the video- system Id like to use 1,3 GHz:
I dont know the brand:
http://www.electronicarc.com/catalog...130cd668edca25

or a Lawmate RX:
http://www.readymaderc.com/store/ind...roducts_id=629

Im not quite sure which one is the better one of those RXs.....

As Tx:
http://www.electronicarc.com/catalog...130cd668edca25

The antennas would initially be the standard ones shipped with the products and a diversity with this one:
http://www.readymaderc.com/store/ind...roducts_id=417

The camera I really dont know. There are too many to choose from. Maybe someone could give me a hint which one is the best to buy for a newbee like me.

At first I want to try to fly with a laptop and videograbber and later on with videogoggles.
There are some more questions: What filters (lowpass) would you use with this setup and how are you shielding your wires and where to put ferrite rings?
What do you think about the equipment-combo?
Im happy with every help and hint from the experienced members here.
Thanks for reading all this and for your help.

regards Michael
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Last edited by muffti; Apr 19, 2012 at 07:42 AM.
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Old Apr 19, 2012, 07:29 AM
Engineer for Christ
IBCrazy's Avatar
Amherst, VA
Joined Jun 2006
10,301 Posts
Your links are no good. I think you misposted them somehow...

In any case, since you already have gone to RMRC, here you go:

http://www.readymaderc.com/store/ind...roducts_id=323

http://www.readymaderc.com/store/ind...roducts_id=552

http://www.readymaderc.com/store/ind...roducts_id=224

All you need from there is a camera. You can get long range antennas later, but that is good for 2 miles or more.

-Alex
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Old Apr 19, 2012, 07:48 AM
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Joined Apr 2012
16 Posts
Hi Alex,
thank you for your answer. I have edited my post and redid the links, should work now.

What do you think about the equipment? Is there anything you would or would not recommend?
I have read that the lawmates are the better receivers because of better filters.
Im happy about any help. Thank you very much.

Michael
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Old Apr 19, 2012, 11:26 AM
Engineer for Christ
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Amherst, VA
Joined Jun 2006
10,301 Posts
The standard RX does fine. Lawmate has a better processor, that's all. It's up to you. What you linked will work fine. What I linked will work better

-Alex
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Old Apr 19, 2012, 01:09 PM
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Joined Apr 2012
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Thanks for your help.
How about the Video-Tx. I know power is not everything but would a 850mw Tx not be better than 400mW? I also read that the noname-Txs often dont reach the power their specifications say.
Im convinced with the antennas. Which one would you recommend ,besides those mentioned, for a receiver diversity?

Michael
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Old Apr 20, 2012, 02:13 AM
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Joined Apr 2012
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Hi again,
still dont know which camera I should choose. Any recommendations?

Michael
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Old Apr 20, 2012, 02:58 AM
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United States, IA, Mason City
Joined Oct 2008
292 Posts
Looks like you did pretty good research!

TSLRS is a great choice. A note on the digital rx though - it doesn't get along well with any 433Mhz system. Go for the analog one from RMRC, the saw modified one or the lawmate (I have both and they seem to perform about the same).

1.3Ghz or 5.8Ghz have been the best for me, and 1.3Ghz doesn't have quite as strict LOS requirements, so good choice.

"More power" gets a lot of argument here. In short, theoretically, a more directional antenna will get you more range easier than a more powerful vtx. If you are flying in a clean environment, this holds very true. In my experience, though, a 3dbi omni and an 11dbi BiQuad have the same signal quality issues (interference received) - increasing from a 200mw to a 400mw, then a 400mw to an 800mw, then an 800mw to a 1500mw increased the quality of the signal (and hence usable range) a lot more. I wouldn't start with a 1500mw, as you have to design very carefully to not cause issues on the plane. 400mw or 800mw will be a good start, if you choose a good vtx (hint: RMRC sells good vtx's at good prices). The Cloverleaf + Skew that IBCrazy linked (and designed and made!) are an amazing choice.

As far as diversity goes, since you are going CP with the bluebeam's the choice is Helical or Crosshair.

http://www.readymaderc.com/store/ind...roducts_id=823
http://www.readymaderc.com/store/ind...roducts_id=475

I can't review either from experience yet Sooon! Save diversity for round 2 of buying though. Even if you are dripping with excess money a less complex setup to start with will cause less issues. Introduce components (points of possible failure) slowly.

For camera.. the $16 one on hobbyking works about as well as the $150 ones, imho. You might look at the popular securitycam ones, as they let you configure some useful for fpv options.

http://www.securitycamera2000.com/FPV/fpv.html
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Old Apr 20, 2012, 03:27 AM
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Ok, thank you for your help.
I think I will go for this video-rx:

http://www.readymaderc.com/store/ind...roducts_id=629

it has a saw filter.

But not sure about the Video-tx. I have to do more research about the " not having so much power as the specs say-issue" with the chinese transmitters.

Michael
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Old Apr 20, 2012, 05:15 AM
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United States, IA, Mason City
Joined Oct 2008
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For the vtx, if you use RMRC, they list the true output power of the TX's they sell. Really any FPV-oriented seller probably will, it is Ebay or chinese sites that you have to be very wary of.
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Old Apr 20, 2012, 05:22 AM
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Joined Apr 2012
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Ok, so you think this one has really 850mW ?

http://www.electronicarc.com/catalog...e52c66a51c7e0d

Michael
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