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Old Apr 15, 2009, 11:08 AM
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France, PACA, Nice
Joined Jun 2008
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Any idea if it will work on Futaba 12Z 2.4GHz using the TX module output connector?
When will you deliver a 12 channels receiver?
Thank you.
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Last edited by impreza54; Apr 15, 2009 at 12:30 PM.
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Old Apr 15, 2009, 11:29 AM
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bracky72's Avatar
Charles Town, WV
Joined Jan 2008
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I hooked it to the module pins of my 10C using a jst balance tap. Servo leads also work fine. The standard futaba module pinout is as you are facing the back of the transmitter from left to right;

pin 1: ppm signal out
pin 2: +voltage
pin 4: ground


I'm trying to find a old futaba module cheap that I will gut and connect to the lrs tx. This way I'll have a more secure connection and won't risk damaging the header pins.
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Old Apr 15, 2009, 02:01 PM
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jalves's Avatar
Portugal
Joined Mar 2004
2,641 Posts
Thomas,

What is the gain of the Rx antennas???
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Old Apr 15, 2009, 02:25 PM
Mr.Pibb's Avatar
Lewis Center, OH
Joined Jun 2006
2,275 Posts
Guys:
I've been talking to Thomas regarding being a distributor for his long range radio. (www.readymaderc.com)
I wanted to get a feel for possible demand for certian products. If you couldn't tell by the name of my store, I tend to sell "ready to fly", or "readymade" equipment. So...keeping in that line of thinking, I was thinking of offering a few various options with Thomas's equipment.
1: I can sell systems that are ready to plug in to various radios' trainer port. For radios that can supply power through the trainer port, this is pretty much a no-brainer. For others (JR?), I'll have to integrate a power supply. Although this is an easy way to set up Thomas's radios, it isn't a great solution if you want to use a head tracker since they usually use the trainer port as well.
2: I could sell full radios already modified with Thomas's system hooked up. This could be an add-on to the outside of the radio, or maybe even integrated INTO the radio in place of the normal 72MHz internal module. I'd probably pick a very specific radio to offer this (7C?).
3: You send me your radio, I add Thomas's RC system to it and send it back to you ready to fly. Not a bad option if you're willing to live without your radio for a while.
4: I could come up with systems that work with module based radios. I think this is the best solution, but the most complicated for us to set up neatly. In a perfect world, it would be "module sized" and not require the big metal box on the back of the radio. In reality, it may need to just clip to the module area but still have the box sticking out of the back of the radio.

Of course, since I offer pre-built planes as well I can offer fully RTF planes with Thomas's system integrated into a radio as well.

So...how many folks are interested in any of these types of products? Are there any other ideas you have? Realize that the solutions will need to be produceable at fairly low quantity levels.

Thanks!
Tim
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Old Apr 15, 2009, 02:42 PM
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Vancouver Island
Joined Mar 2009
2 Posts
I recently received my LRS system from Thomas and was quite impressed with the ease of installation and quality of the product and service. Just dropping in to relay some minor glitches I had with my installation and compatibility issues with my Futaba 10C.

I had installed the TX module to the controller utilizing the units power supply, I experienced large voltage drops and it was continually chirping away at me for no reason (well there was a reason but not a valid one). When I unvelcroed the TX module from the controller and held it away 4-5 inches it would work fine. With the stock Futaba 9.6v 700mAh battery it would run ~40-50min. With my aerial video platform running up to 3 hours this was posing problems with pulling the battery, having autopilot take over, replacing the battery and hoping to be quick enough to get back on track.

My solution was to use the second half of the trainer cable ~9' (that I originally discarded for a foot long piece) and solder this in place through a plastic compression fitting on the TX module. I also added an external power connector that I can attach a 4000mAh pack that runs longer than I have tested so far. Without a TX module in the Futaba 10c it will run for 5+ hours on the stock battery. Now when the aerial video platform lands for fuel I can swap out all batteries and just keep running!

This set up also eliminates a longer length of coax that is required when the 7w booster and Yagi are in operation and trying to keep clear of the video receiver, plus I get to sit inside the vehicle with all the bulky components outside

Good work Thomas !
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Old Apr 15, 2009, 05:15 PM
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bracky72's Avatar
Charles Town, WV
Joined Jan 2008
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I did a range test of the system today and was IMPRESSED with the result. The test was under very poor conditions. It was raining pretty hard so my friend waited in his garage with the rx with servo attached/failsafe set while I got in my car and drove across our subdivision to the store .87 miles away (straight line distance according to google earth). There are many houses and trees separating his house and the store. Failsafe finally kicked in as I was parking but I held the tx up to the window and regained control. I was amazed that at almost a mile while in my car I still had control. Tomorrow we are going to conduct a line of site test and expect a much greater distance.
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Old Apr 16, 2009, 03:21 AM
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Danmark, Hovedstaden, Ballerup
Joined May 2007
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>Does the second antenna wire down the coax need to be inline with the main antenna wire or can there be a bend?

it can be bend, email me please and ask for the closeup design pictures and instructions about the mcx wire antennas

>Are your systems capable of working side by side?

YES, if you order two systems and ask to get the two tx boxes with different ID codes they can work side by side, acually you can operate 200 units side by side,
if you want to make mission take overs, be sure to order two tx units with SAME ID codes.

>By this I mean having myself piloting and a friend operating the camera system to the same plane with no interference?

no problem, another option is maybe connect a student system to your main system
and then route all the studen signals out too, the rx can handle 12ch of servoes,
then you only need one tx and one rx.

>Forgot to ask, what kind of video downlink systems are people using for 15km+ transmission?

see here my own video range test 51 km !
http://www.rcgroups.com/forums/showthread.php?t=920066
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Old Apr 16, 2009, 03:32 AM
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Danmark, Hovedstaden, Ballerup
Joined May 2007
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>Any idea if it will work on Futaba 12Z 2.4GHz using the TX module output connector?

I bet so !!

>When will you deliver a 12 channels receiver?

soon ! until then the existing rx can be modified by good solder specialists to give you access to the extra 4 ch that is outputted on the chip, see here:
http://www.webx.dk/rc/uhf-link3/manu-sw308.htm

>What is the gain of the Rx antennas???

a quarterwave whip is defined as having zero gain,
I know many other sites say this and that hi gain, but they have no idea about it.
I think the "new" rx antennas with the ground wire is 1-2db better, so lets hear from gary, when he have updated his antennas and performed range comparings,
then he can actually prove how much better in real life usage.

>I was amazed that at almost a mile while in my car I still had control.

get a car style magnetic whip for UHF 70cm HAM radio band
and put it on top of your car, connect it to your LRS TX using as short and thick
cable as you can, now you get the range you can dream of..
handheld antennas inside a metal box like a car is not really super :-)
you should do the same for the video link, plenty of space on car roof for antennas and video rx, if you use 2.4GHz for the video I suggest you put the video rx directly connected to the antenna, cable at 2.4 have huge loss, about 1db pr meter or even more if cheap cable
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Old Apr 16, 2009, 03:49 AM
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jalves's Avatar
Portugal
Joined Mar 2004
2,641 Posts
Quote:
Originally Posted by thomasscherrer
>What is the gain of the Rx antennas???

a quarterwave whip is defined as having zero gain,
I know many other sites say this and that hi gain, but they have no idea about it.
I think the "new" rx antennas with the ground wire is 1-2db better, so lets hear from gary, when he have updated his antennas and performed range comparings,
then he can actually prove how much better in real life usage.
What is the version of my Rx antennas?

Could you post a pic of the new antenna version with the ground wire?
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Old Apr 16, 2009, 05:58 AM
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new page made:
http://www.webx.dk/rc/uhf-link3/mcx-antenna.htm
now it is easy to find this information when needed :-)
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Old Apr 16, 2009, 06:24 AM
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France, PACA, Nice
Joined Jun 2008
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Have you already thought about a way to output a signal quality that could be displayed by the OSD in the downlink video?
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Old Apr 16, 2009, 08:00 AM
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Danmark, Hovedstaden, Ballerup
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yes, I have both digital codes out of the RX, and analog RSSI signal,
I am working together with a mayor OSD supplier to handle and display this,
many other OSD's might be able to display analog voltages,
then you should configure the OSD to display 0-100% calibrated after the lowest and highest rssi voltages, from loss of link to best possible, now you have an indication of your used range or if you are flying too close to the loss limit, and can return home before a crash.
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Old Apr 16, 2009, 08:16 AM
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Abraxas's Avatar
Austria
Joined Apr 2009
36 Posts
please show us where the rssi Voltake points are located at your receiver or how it can be measured

thanks
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Old Apr 16, 2009, 08:24 AM
Registered User
France, PACA, Nice
Joined Jun 2008
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What does RSSI stand for? It is not in your glossary: http://www.webx.dk/rc/uhf-link3/explain-names.htm

EDIT: ok thanks to Wikipedia.. http://en.wikipedia.org/wiki/RSSI
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Old Apr 16, 2009, 09:05 AM
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Portugal
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2,641 Posts
google rssi
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