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Realistic range with QX7 + X4R-SB? (180m with current configuration)
#16
(10-Jan-2018, 01:36 PM)xcalibur Wrote: Agree! Was thinking along the same lines. I have A LOT of spares lying around from various "accidents". Have 2 sets of ESCs lying around I still need to figure out how to test for the faulty ones.

Spare motor and a servo tester.
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#17
(10-Jan-2018, 02:28 PM)unseen Wrote: Spare motor and a servo tester.

Spare motor -> CHECK
Servo Tester -> Now on my list of things to buy.
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#18
Set servo tester to minimum pulse length.

Connect motor to ESC. Connect ESC to battery. Connect battery to 5V regulator. Connect 5V regulator to servo tester. Connect servo tester output to ESC signal input.

Turn knob on servo tester to increase pulse length.

Either watch motor start to spin or watch smoke rise from ESC.

Done!

Big Grin
[-] The following 3 users Like unseen's post:
  • xcalibur, kaitylynn, Tom BD Bad
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#19
$41 later and my new X4RSB is on its way. Should arrive by tomorrow. Will keep you guys/gals (to cover kaitylynn Big Grin ) updated.
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  • kaitylynn
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#20
$41!

Even bought locally in Sweden they're not that expensive. I hope yours arrives gold plated for that price!
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#21
(11-Jan-2018, 03:42 PM)unseen Wrote: $41!

Even bought locally in Sweden they're not that expensive. I hope yours arrives gold plated for that price!

Sad but true. I paid R510.00 (South African Rand)

R470.00 (38USD) - X4RSB
R40.00 (3USD) - Shipping

And that was from the cheapest supplier in SA. It's the price you pay for living at the edge of civilisation.
[-] The following 1 user Likes xcalibur's post:
  • unseen
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#22
I'm happy to learn that I don't actually live in one of the most expensive countries in the world! Big Grin
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#23
Hey X, it wouldn't have saved you anything, but just FYI -
GearBest have a shipping option called 'Priority Line' which will get here in a week or so, usually about $10-15 US.

Might be viable for a set of ESC's or motors. I bought me Mrs a Tablet from them, thought I would throw in a few hobby bits too, pleasantly surprised by the service, however in typical SA style when they phoned for an ID number, they didn't know what to do about me not having 1 (what to do with a UK passport number!?), and I had to give them my wife's. They also didn't mention that delivery would not take place until after the import duties had been paid, so I had to chase them to pay. Rolleyes

(11-Jan-2018, 04:20 PM)unseen Wrote: I'm happy to learn that I don't actually live in one of the most expensive countries in the world! Big Grin

What we lay out in shipping we easily make up for in cheap beer!
Windless fields and smokeless builds
[-] The following 2 users Like Tom BD Bad's post:
  • unseen, xcalibur
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#24
New receiver arrived on Friday. I updated both the RX and TX firmware to the latest versions, installed and tested. The results are baffling to say the least. 

I configured my TX to shout out the RSSI value continuously and placed it 10m away. (NOT in range test mode) 

Plug in lipo: 
TX:  "94db, 94db, 93db, 96db" etc. 
Unplug lipo. Wait a few second. Plug in lipo: 
TX: "63db, 67db, 62db, 63db" etc. 
Unplug lipo. Wait a few second. Plug in lipo: 
TX: 88db, 83db, 94db, 96db" etc. 

This makes no sense to me. Every time I power the model my readings change, drastically. 

I then took the model outside for a range test and things got even stranger. At about 15m my TX shouts "RSSI Low" (45db). Keep walking and it picks up again, hovering at 56-61 until about 45-50m where it hits RSSI Low and Critical. (as expected) 

I decided there might just be interference at my 15m mark and took the model to an open field and flew the damn thing. 15m out "RSSI LOW", keep going and it picks up again. At 200m I ran out of field and had to turn around but still got 58db.

Thoughts?
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#25
Most likely you are seeing a practical demonstration of the Fresnel zone. (See: https://en.wikipedia.org/wiki/Fresnel_zone)

If your initial test at 10m was indoors, there will be all kinds of reflections that will mess things up, not just Fresnel zone effects.
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#26
Sounds like "ley lines" or aliens to me mate!
Windless fields and smokeless builds
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#27
(15-Jan-2018, 12:09 PM)Tom BD Bad Wrote: Sounds like "ley lines" or aliens to me mate!

I'm gravitating towards the same. If Ed still lived I bet he would have an answer for me.

For now, debugging continues.
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