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Old Nov 27, 2012, 06:09 PM
Koo is offline
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A semi-advanced FPV newbie
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Discussion

HK's Orange 433Mhz ultracheap open-LRS UHF system-now released


100mw Modules
OrangeRx Open LRS 433MHz TX Module (JR/Turnigy compatible)

1Watt Modules
OrangeRX Open LRS 433MHz Transmitter 1W ( JR Compatible) (NEW)
Futaba Compatible module 1W

Receiver
OrangeRx Open LRS 433MHz 9Ch Receiver


Some very helpful posts and links:
Kha's original thread about OpenLRS

*New*A video tutorial from binding to uploading new firmware.

A wiring guide in updating the firmware

A guide to build a buffer to get analog RSSI for OSDs like Nova, Storm ETC

OpenLRS firmware to make this system a lot more reliable (thanks Kha)

The mastermind behind the openlrs firmware is kha who has spent countless hours on this thread helping people with questions on this thread.
If you appreciate his work as much as I do, consider donating him for all the hard work he has put to this amazing firmware.

https://www.paypal.com/cgi-bin/websc...=DSWGKGKPRX5CS

Amazing guide to flashing the rx and tx. I used this one.
Last edited by Koo; Nov 15, 2013 at 09:44 AM.
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Old Nov 27, 2012, 06:20 PM
DJO is offline
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"Yo, that's a thermal"
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Be careful with it. Personally I wouldn't trust a HK UHF on a $300+ long(er) range plane... just be careful and wait for someone else to review it first

Very little specs given so far - hopefully somebody trustworthy gives a review on it on YouTube, or more specs are added.

RangeLink is pretty cheap at $190 for a UHF (compared to most). This, I'm guessing, will be below that but somewhere around $100 still. But saving $90 isn't worth loosing your whole FPV aircraft



Dan
Old Nov 27, 2012, 06:27 PM
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I'll buy this the day it comes out. Saw you on youtube as well The first couple of flights I just might have my FrSky onboard as a buddybox and be 100% sure that my RTH works correctly.
Old Nov 27, 2012, 06:30 PM
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How did you get your calculations to come out to 10 miles? EzUHF at 600mw does 30 miles, yes. 100mw is 1/6 of 600mw. 1/6 of 30 miles = 5 miles range for the HK UHF system.

LOL ya saw you on YouTube also. Please support getting the HAM license to operate this also, thanks



Dan
Old Nov 27, 2012, 06:36 PM
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It says openlrs on the rx
Old Nov 27, 2012, 06:59 PM
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USA: LakeGeorge, New York
100mW UHF Tx, so it will be afordable....

Will it affect our VidRx?
Old Nov 27, 2012, 07:04 PM
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Quote:
Originally Posted by rclab1 View Post
100mW UHF Tx, so it will be afordable....

Will it affect our VidRx?
Depends on the vRX that you're using. You can always add a filter on either the RX or the UHF module for the TX and cut down most, if not all, harmonic interference.



Dan
Old Nov 27, 2012, 07:34 PM
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fly by night
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Quote:
Originally Posted by DJO View Post
How did you get your calculations to come out to 10 miles? EzUHF at 600mw does 30 miles, yes. 100mw is 1/6 of 600mw. 1/6 of 30 miles = 5 miles range for the HK UHF system.

LOL ya saw you on YouTube also. Please support getting the HAM license to operate this also, thanks



Dan
That is not how RF range is calculated. Range is not directly proportional to power. When you double power, you only gain 50% more range. So this system should be good for more like 15km.

I wonder what the price will be, but I will definitely buy it if it is cheap for use in an expendable long range project plane.
Old Nov 27, 2012, 07:41 PM
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Wow it does say Open LRS, wonder if they cloned Flytron's stuff?

FYI I see Flytron now has a 1w module
http://www.flytron.com/openlrs/212-o...or-futaba.html
Old Nov 27, 2012, 08:35 PM
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Quote:
Originally Posted by BCSaltchucker View Post
That is not how RF range is calculated. Range is not directly proportional to power. When you double power, you only gain 50% more range. So this system should be good for more like 15km.

I wonder what the price will be, but I will definitely buy it if it is cheap for use in an expendable long range project plane.
Sounds good! So about 10 miles max. Yeah I knew that about RF range but still trying to remember how it all works LOL

Dan
Old Nov 27, 2012, 08:45 PM
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fly by night
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Quote:
Originally Posted by peatmoss View Post
Wow it does say Open LRS, wonder if they cloned Flytron's stuff?

FYI I see Flytron now has a 1w module
http://www.flytron.com/openlrs/212-o...or-futaba.html
interesting site, thanks

they also have a 7 Watt (!!) booster for amplifying any brand of UHF system. ohh mah gawd

http://www.flytron.com/openlrs/108-7...r-for-uhf.html
Old Nov 27, 2012, 08:59 PM
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Quote:
Originally Posted by BCSaltchucker View Post
interesting site, thanks

they also have a 7 Watt (!!) booster for amplifying any brand of UHF system. ohh mah gawd

http://www.flytron.com/openlrs/108-7...r-for-uhf.html
Isn't it stated that 1W is maximum power the radio control link could be according to HAM regulations?
Old Nov 27, 2012, 09:08 PM
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Good catch! And yes that's true, only 1 watt output for the TX for a R/C radio is legal.

From HAMTestOnline:





Dan
Old Nov 27, 2012, 09:17 PM
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well if I ever get past 30km out, I might take a chance on running 7watts

ie probably never

I would imagine that kind of power would wreak havoc on the other ground station systems
Old Nov 27, 2012, 09:20 PM
rclab1 is offline
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USA: LakeGeorge, New York
BCSalt,

doesn't the ThomasLRS use that much Watts for boosters?


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