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Old Feb 27, 2011, 08:08 AM
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asaloca's Avatar
Delray Beach
Joined Aug 2004
175 Posts
Quote:
Originally Posted by EhDolph View Post
When i shut off the Lawmate reciever there is a blinking red LED. what does this meen ?
Think you have a circuit issue.....turned off it must not appear any light at all.

FRED
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Old Feb 27, 2011, 09:26 AM
Registered User
Luxembourg
Joined May 2009
774 Posts
Little update about servo jittering:

using a bazooka antenna rather then a Vee dipole helps but it is only a temporary solution until you change the servos because this antenna is less effective and heavyier.
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Old Feb 28, 2011, 10:32 AM
RC pilot by soul
Israel
Joined Apr 2005
2,458 Posts
So guys, thats the verdict on the BOB Fox-700 and the Sunsky 800mW 1.2Ghz Tx/rx ?

I have both on the desk but havent had time to do testing yet, so looking for tips on do's and dont's and possible points of improvements.
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Old Feb 28, 2011, 01:38 PM
my karma ranover my dogma
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Edmonton,Canada Eh
Joined Jun 2007
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Quote:
Originally Posted by i3dm View Post
So guys, thats the verdict on the BOB Fox-700 and the Sunsky 800mW 1.2Ghz Tx/rx ?

I have both on the desk but havent had time to do testing yet, so looking for tips on do's and dont's and possible points of improvements.
I have one of each also...

Not flown yet but working very good in ground testing. Stock antennas.

I did the SAW filter mod to both Rx.
Seems to help reception of the signal and reject multipathing/interference a bit. (anecdotal evidence only)
All testing done on 1280Mhz only.
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Old Feb 28, 2011, 01:40 PM
RC pilot by soul
Israel
Joined Apr 2005
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Quote:
Originally Posted by galaxiex View Post
I have one of each also...

Not flown yet but working very good in ground testing. Stock antennas.

I did the SAW filter mod to both Rx.
Seems to help reception of the signal and reject multipathing/interference a bit. (anecdotal evidence only)
All testing done on 1280Mhz only.
Whats the SAW filter mod and where can i see info about it ?
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Old Feb 28, 2011, 01:50 PM
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Lakewood, Colorado
Joined Aug 2002
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Search the FPV forum for "saw filter". It's all there in the search results.

ian
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Old Feb 28, 2011, 07:22 PM
Flying low is expensive.
pdiddyg40's Avatar
United States, CO, Boulder
Joined Jul 2008
2,398 Posts
Hey everyone I've been working on my FPV EZ* and I came across a question last night. While on my workbench, I get clear video. But when i move my servos (primarily the elevator) i get some light horizontal banding. Its not a really bad problem, and I am certainly able to see through it and fly through it.

So apparently I am getting some servo interference. My servo wires and servos themselves are within 3-4 inches of the VTx. Any possible solution ideas? I've heard good and bad stories on ferrite rings. Do they actually work?

TIA.
-P.D.
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Old Feb 28, 2011, 07:55 PM
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Surrey, BC
Joined Jun 2007
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Are you sharing batteries?, try twisting the wires or shielding itt.
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Old Feb 28, 2011, 08:14 PM
Flying low is expensive.
pdiddyg40's Avatar
United States, CO, Boulder
Joined Jul 2008
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Quote:
Originally Posted by paintball_kidz View Post
Are you sharing batteries?, try twisting the wires or shielding itt.
Nope, the system is run off of different batteries. I will try the twisting trick next time i work on it.
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Old Mar 01, 2011, 01:08 AM
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Luxembourg
Joined May 2009
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Quote:
Originally Posted by galaxiex View Post
I have one of each also...

Not flown yet but working very good in ground testing. Stock antennas.

I did the SAW filter mod to both Rx.
Seems to help reception of the signal and reject multipathing/interference a bit. (anecdotal evidence only)
All testing done on 1280Mhz only.


1st page guys..... 1st page.......

Short answer: the fox 800 from inesun.
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Old Mar 01, 2011, 01:18 AM
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North vancouver, B.C. Canada
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I got a few 1 watt 1.2/1.3 lawmate tx's and recommended patch from hobby wireless
to test out
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Old Mar 01, 2011, 03:58 AM
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Where there made frequency measurements of the channels for the current top choice fox-800? So that I could make a half-wave or quarter-wave antenna..or the inverted V...Did anyone post measurements of their homemade antennas for this vtx?
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Old Mar 01, 2011, 05:18 AM
Flying low is expensive.
pdiddyg40's Avatar
United States, CO, Boulder
Joined Jul 2008
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Originally Posted by pdiddyg40 View Post
Nope, the system is run off of different batteries. I will try the twisting trick next time i work on it.
Alrighty, so I braided the two servo wires and esc control wire together (I just read somewhere that braiding is supposedly better than twisting) then ran the system up again. I *think* that it made a difference. Its not huge, and the banding is still there, but there may be less of it, haha.

-P.D.
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Old Mar 01, 2011, 07:43 AM
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Luxembourg
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Quote:
Originally Posted by msev View Post
Where there made frequency measurements of the channels for the current top choice fox-800? So that I could make a half-wave or quarter-wave antenna..or the inverted V...Did anyone post measurements of their homemade antennas for this vtx?
On first page you will find the available frequencies for the inesun.
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Old Mar 01, 2011, 08:30 AM
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Sorry I missed that...So are these frequencies really accurate or just stated? Are the tx and rx frequencies well matched? Can you maybe point me to some measurements (length, design of the antenna, outcome) that some user who made a homemade antenna with improved characteristic to the stock ones..If someone did share something...

Has anyone ever tryied these servos: BEV-ES08MA (Deamon has them on his 1.3Ghz Skywalker so I guess we are safe)
I'm more interested about these BEV-ES08A (a supposedly non-jitter analogue of hxt900)
On the BEV page they claim that these servos don't jitter.
Another thing, I PM'ed dadde from rcexplorer.se, because I saw in his twinstar fpv build that he is using hxt900 (4 of them) with a 1.3Ghz system and I guess he is not having jittering issues, I will see and tell here what he answers..

I'm sorry if I'm bothering too much with asking all the questions...
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Last edited by msev; Mar 01, 2011 at 12:18 PM.
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