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Specification: Brand Name: Jumper Model: T8SG Lite
Channels: 12ch (depending on the receiver)
Size: 138*162*38mm
Weight: 218g (without battery)
Battery: 4x AA battery
Firmware: Deviation
Display: 1.7” LCD display
Gimbal Type: Joystick
Upgrade method: USB online upgrade
Simulator mode: 3.5mm standard ppm output or USB HID
Maximum Transmission Power: 0-150mw
Compatible protocol: FrSKY & S-FHSS
Feature:
- Open source multi-protocol firmware, Based on Deviation TX
- Low cost and ultra-compact form factor
- USB online firmware upgrade
- Ultra-low power consumption, longer battery life
- Up to 12 channels of output (depending on the receiver), Open
Source Firmware, all channels are fully programmable
- Multilingual menu: Yes
- Vibration Alerts: Yes
- Support telemetry (depending on the receiver): Yes
Package Included: 1x Jumper T8SG Lite Radio Transmitter 1x Neck Strap
I was sent the Jumper T8SG for review and testing - RCG Thread Product page @ Banggood
The Elephant in the Room ! ( Deviation ) Deviation is not the easiest OS / Firmware to work with , so just be aware that it just might be the hardest OS to learn to use when it comes to programming functions and mixes . If you visit the Deviation forum / web > https://www.deviationtx.com/ you will see this warning ! WARNING: Deviation is experimental software. There are no guarantees made or implied about the quality or reliability of this software. RC models can cause serious injury or death if flown improperly. By deciding to use the Deviation software, you are taking sole responsibility for the control of your models. The authors of Deviation will not be held responsible for any injury or damage caused by the use of the Deviation firmware. Be cautious. You have been warned.
I would highly recommend you visit the deviation Wiki and maybe download the PC Emulator if you have never been exposed to Deviation . Nothing worse than buying something only to be frustrated to the point you give up and sell the Tx you coveted so much . For me personally , what I found most frustrating is the time spent searching for information . The first time I was exposed to Deviation , for the life of me I could not find a throttle cut guide . After ? how much time I worked it out and posted a video on youtube so that others did not have to be challenged as I had been . So that is the Elephant in the room , Deviation can be a challenge and a learning experience . So Be Aware ... If you are not prepared for an education , you may want to maybe try the Jumper T12 which runs OpenTx ( Which in comparison is a walk in the park ) . Just be aware that the T8SG Lite and T12 are new releases and there may be growing pains .
My first post @ RCG
It arrived this morning !
My second post @ RCG
So where are we ?
The Gimbals .... ( The interface between the user and transmitter ) Ok so I had some issue with the gimbal on the right side of the Tx . After sorting things out and binding the T8SG Lite to my Light Wing Project ( FrSky Rx ) I proceeded to check out how the gimbals feel . And I have to report that there is a fair degree of dead band around Neutral Stick .
XK251 ( Quad ) To actually go out and fly is the true test of a transmitter . And for that I bound the T8SG Lite to a XK251 ( Futaba S-FHSS protocol ) and then proceeded to try it out . Now at first I did a bad thing ! I tried to fly in my room and that was a huge mistake . There is just enough dead band around neutral stick to make such an attempt foolish . I had no precise / fine control over the XK251 at all and I was bouncing the XK251 of everything near the floor . I pulled the plug on that stupidity after a few attempts and the next day took it outside where I have at least a few meters of run off space . Well , it was certainly an experience I can say ! First , the throttle stick is so lose that throttle control is challenging . Applying rudder control ( mode 2 ) was impossible , the throttle is so lose that any attempt at rudder function changed the throttle setting sending the XK251 plummeting toward the ground or rocketing up into the sky . Ail / Ele - Dead band around center stick . The dead band really took away any real ability to input fine precise control over the XK251 . You sort of lean on the gimbal and nothing happens , increase the pressure and still nothing . And when it finally does something the XK251 ( being high performance ) , rather than move gently sort of jerks itself in the direction of stick movement . ( That dead band ) Now the dead band is annoying but not a deal breaker , the lose as a goose throttle how ever ! So why is this so ? Well for some reason Jumper decided to go with Toy Gimbals that can not be adjusted rather than with proper RC gimbals that can be adjusted . Why ?
The T8SG Lite ... Runs on 4 x AA . Has two 3 position switches as well two side wheels . Size - One of the smallest computer Tx available - if not the smallest . Protocols - FrSky - FrSky V8 - FrSkyX - Skyartec - S-FHSS - Corona - PPM - USBHID Jumper had a really good concept going here , I really like everything about this transmitter ( Lets not worry about Deviation ok ) and what really lets it down is the toy gimbals . And in all honesty I simply can not get past how NOT GOOD the gimbals are on the sample I got . The short and long of it is that the gimbals really ruin what was a good idea . If my sample is anything to go by then I can not recommend the Jumper T8SG Lite to the general RC community . How ever if Jumper were to put better Gimbals on this Tx , then it could be something special .
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