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airmcn_3
Jun 12, 2009, 01:32 PM
Quick question.

Which would you prefer?

900 MHz 12 dbi Patch
900 MHz 12 dbi Yagi

Just thought I would ask as I have never tried a Yagi for the telemetry....


Chris
Irv
Jun 12, 2009, 03:48 PM
Quick question.

Which would you prefer?

900 MHz 12 dbi Patch
900 MHz 12 dbi Yagi

Just thought I would ask as I have never tried a Yagi for the telemetry....


Chris

Convince Dean to design an auto-tracker then go with the Yagi.
airmcn_3
Jun 12, 2009, 05:52 PM
Convince Dean to design an auto-tracker then go with the Yagi.


Already convinced ;) Thanks for the suggestion.
Nobert
Jun 12, 2009, 06:03 PM
Chris
While you're at it design a Yagi for 1280 as well. Tucson Police, Fire and hospitals are all on 900.
Thanks,
Neal
airmcn_3
Jun 12, 2009, 06:55 PM
Chris
While you're at it design a Yagi for 1280 as well. Tucson Police, Fire and hospitals are all on 900.
Thanks,
Neal


Neal,

Interesting to know.

Check this out. http://www.directivesystems.com/PDF/2314LYRM.PDF
Nobert
Jun 12, 2009, 08:34 PM
Chris
Thanks for the info.
Neal
Connexxion
Jun 13, 2009, 05:05 AM
There's a dutch guy (Sander) at the FPV section who already has a direction system.He invented with others (I believe) the EZ-line.
airmcn_3
Jun 13, 2009, 09:39 AM
There's a dutch guy (Sander) at the FPV section who already has a direction system.He invented with others (I believe) the EZ-line.


You are correct but in order to have the EZ tracking system it requires you buy the $300.00(Correction $219.00) OSD unit on top of the $100+ hardware board. This does not include the pan tilt setup......

But again you are correct there is that option.

Chris
Gary Mortimer
Jun 13, 2009, 10:13 AM
I think I might be tempted to go vertical and put that on a telescopic pole.

http://www.wlanmall.com/900mhz-omni-antenna-902928-vertical-p-1062.html

Also make sure my ground station was on the highest bit of ground around.

Guess it all depends on the distance required, within VLOS nothing fancy is needed.

Also lowering the frequency used will help, not going up ;-)
ImmersionRC
Jun 13, 2009, 10:56 AM
You are correct but in order to have the EZ tracking system it requires you buy the $300.00 OSD unit on top of the $100+ hardware board. This does not include the pan tilt setup......

But again you are correct there is that option.

Chris
Just to be fair, that would be the $219 OSD unit (which includes the GPS and current sensor).

http://www.nghobbies.com/cart/index.php?main_page=product_info&cPath=106&products_id=327
airmcn_3
Jun 13, 2009, 11:36 AM
Just to be fair, that would be the $219 OSD unit (which includes the GPS and current sensor).

http://www.nghobbies.com/cart/index.php?main_page=product_info&cPath=106&products_id=327


Thanks for the correction. Not bashing the product by any means, just be really nice if you were able to accept NEMA from our ground station.