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Old Mar 20, 2011, 06:56 AM
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Italia, Piemonte, Torino
Joined Jul 2009
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Quote:
Originally Posted by thomasscherrer View Post
to NEO

The TX drop, well all electronic devices can be broken
by a simple drop on the floor, I suggest you open it and first perform
a visual check, no loose parts ?
I am mostly worried about the two capacitors, are they both still nice on location ?
if yes, perform range check, and compare the results with your old range checks.

Yes i check it but apparently all was perfect.

>Another one think, what gain have the original whip antenna?

there is no gain in a whip quarterwave antenna,
gain means direction,
the higher gain you have the more directional is gets.

Ok

>This is the antenna that i have replaced the wire that i have used is ok?

yes, looks perfect

> And i notice one thing, the coaxial cable dont is 24 cm but is 19 cm why?

dont matter

> Is antenna of my first order with receiver v3.31C.

fine, it can still be used, I have changed to a different coax cable type and different coax connector, straight and no more angled on the cable,
now the angled part is on the pcb, it is a bit smarter this way,
but for you no different in performance.

ok

-------------------
if you feel unsure about your system, after a crash, or drop on the floor or whatever,
DONT fly it, but send it in for check and service here !
I do the service for free !!! you just pay postage both ways,
you get a full repport, and If I find anything wrong or thing to repair / replace
I inform you all the way.
Then you can fly again with confidence.
Thanks, i make other tests and I'll let you know.
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Old Mar 20, 2011, 02:04 PM
T.ing to put on air 100 models
chiloschista's Avatar
Switzerland
Joined Feb 2008
642 Posts
Hi Thomas,

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.

Thanks

Ric
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Old Mar 20, 2011, 02:30 PM
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Danmark, Hovedstaden, Ballerup
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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.
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Old Mar 20, 2011, 02:37 PM
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Easy Star (27 min 49 sec)
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Old Mar 20, 2011, 03:10 PM
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Joined Jul 2008
1 Posts
Futaba FX-30 with LRS

Hello Thomas,

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?


Thanks.
Joe
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Old Mar 20, 2011, 03:36 PM
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Italy
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What do you think of this cable?
http://cgi.ebay.it/Kabel-50Ohm-Airce...ht_2228wt_1531

aircell 7 shoul loose 1,3 dB in 10 meters
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Old Mar 20, 2011, 09:20 PM
KC9TPL- Get Legit
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USA, IN, Bloomington
Joined Aug 2007
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Thomas-
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?

Thanks,

Tom
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Old Mar 20, 2011, 09:28 PM
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long range is in the horizon for me

anyone up for a long range competition?

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Old Mar 20, 2011, 10:45 PM
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carbon fiber crash proof cage and laminated wing no more broken foam planes
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Old Mar 20, 2011, 11:19 PM
The Fixer
Martin Y's Avatar
Canada, ON, Milton
Joined Jan 2009
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Quote:
Originally Posted by Neo360 View Post
Nice one Neo.

Quote:
Originally Posted by David22 View Post
long range is in the horizon for me

anyone up for a long range competition?

I love to if I can find a large enough area to try it. I may have to try over Lake Onatio.
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Old Mar 21, 2011, 12:09 AM
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North vancouver, B.C. Canada
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I have always wanted to try a long range over the water flight, that would be really cool



Quote:
Originally Posted by Martin Y View Post
Nice one Neo.



I love to if I can find a large enough area to try it. I may have to try over Lake Onatio.
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Old Mar 21, 2011, 03:44 AM
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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

Quote:
Originally Posted by BloomingtonFPV View Post
Thomas-
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?

Thanks,

Tom
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Old Mar 21, 2011, 03:46 AM
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>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
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Old Mar 21, 2011, 04:29 AM
Registered User
Italy
Joined May 2009
364 Posts
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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Old Mar 21, 2011, 09:56 AM
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yes that is good cable, just dont bend it too much many times.
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