|Mar 20, 2011, 06:56 AM|
Italia, Piemonte, Torino
Joined Jul 2009
|Mar 20, 2011, 02:04 PM|
I'm wondering if toroids on long servo cables are still mandatory, like on 35MHz.
Sometime ago I was speaking with a 2.4GHz RC producer about his system, which is filtered on servos input, and he said that using toroid is never a mistake.
The problem is that I'm preparing a plane, which has long ailerons flat servos cable. I had to use flat cables
Receiver is connected to an autopilot with only PPM cable, but ground is anyway shared by all the components, so the question again :
are toroid mandatory, or they are of minor / no impact on RC side with your system ?
Avoiding toroid I could have a nicer cables layout, this is my primary goal, not a bulky "Kabelsalat".
I'm not speaking of video etc.
|Mar 20, 2011, 02:30 PM|
Hello again Ric, well if nothing on the plane generate noise in the 70cm band
toroid and such is only a waste of weight and money, seen from the RC RX side :-)
But for video it may be a good idea with such filters -
if you see stribes when servoe move or when the motor is on,
try toroids and large caps close to cam and VTX
and shielded video cables.
But to "solve" a problem before you have it, may sound dumb,
with detailed range tests as I have explained many times, you should be able to
reveal is any items on your plane have any effect on the actual range,
if no effect on range, and if no effect on video, why add heawy and bulky items ?
also some SBEC do generate a bit of stribes on the video, that must offcourse be fixed.
|Mar 20, 2011, 03:10 PM|
Joined Jul 2008
Futaba FX-30 with LRS
I was using your LRS with Graupner MC-22s without any trouble. But I have bought brand new radio Futaba FX-30 and there I have problem to connect your system to this radio.
Is here some simple solution?
|Mar 20, 2011, 09:20 PM|
Today during testing I reversed the ground/5v/PPM/RSSI cable on my NR 90 degree pin receiver. I unplugged the battery almost immediately. Nothing seemed to be smoking and the receiver seems to work fine once I fixed the cable. Here is what happened:
The ground went to the RSSI pin on the RX
5 volts when to the PPM pin
the ground pin on the RX was connected to the RSSI channel on my OSD.
the 5V pin on the RX was connected to the PPM channel on my OSD.
Do you think I damaged the receiver? Is this something that could cause it to fail later on?
|Mar 20, 2011, 10:45 PM|
san marcos ca
Joined Nov 2010
carbon fiber crash proof cage and laminated wing no more broken foam planes
Last edited by wingman9; Mar 24, 2011 at 11:01 PM.
|Mar 20, 2011, 11:19 PM|
|Mar 21, 2011, 12:09 AM|
North vancouver, B.C. Canada
Joined Apr 2008
|Mar 21, 2011, 03:44 AM|
dont you worry, the rssi and servo signals are high impedance,
and the way pins are located makes the RX somewhat protected
for 180 deg connector inserts, but if you make a 180 deg and offset
error at the same time !! kaboom
was it an NR or LR receiver ?
the NR do not have rssi buffer, so it is easier to kill,
it is my experiance with the radio chip if you kill it, it is dead..
there is no living-dead only works after dark :-)
so if yours looks like working, it most likely is.
I suggest you simply double check rssi out works as normal,
0.5V = no signal
1.0V = full signal
|Mar 21, 2011, 03:46 AM|
>I have always wanted to try a long range over the water flight,
>that would be really cool
just remember, when you fly over water, there is no bail-out,
no where to land, and no where to search ...
so dont you fly until battery is out, and glide 10-20 km back as you use to :-)
also when you fly over water (or over clouds) there are no visual que points,
so you will get lost if not flying after GPS-OSD
|Mar 21, 2011, 04:29 AM|
Joined May 2009
OSD termophile sensors get crazy over a lake, don't use that kind of stabilization.
I am making an installation on a mpx Mentor for that purpose, I will post pics if you want
thomas i'm going to buy a 5 meters bnc to bnc aircell 7 cable, is it ok? thank you
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