Just a few months in the past, Jumper launched the T14, a mid-sized radio that shortly gained recognition within the FPV group for its spectacular options and aggressive pricing. Now, Jumper is again with the T15, a brand new radio that builds on the success of the T14 with some important upgrades, together with an distinctive show and numerous shade selections for the housing. Let’s dive into what makes the Jumper T15 stand out and whether or not it is likely to be the best selection on your FPV wants.
Study concerning the fundamentals of FPV radio controllers on this purchaser’s information: https://oscarliang.com/radio-transmitter/
The place to Purchase and Unboxing
You will get the Jumper T15 radio from:
The Jumper T15 is obtainable in seven vibrant colours.
Much like the Jumper T14, the Jumper T15 comes well-packaged in a sturdy carry case, a major improve over the Jumper T20S, which doesn’t embody one. Contained in the field, you’ll discover:
- USB-C cable for charging and firmware updates
- Spare springs for adjusting gimbal rigidity
- Display screen protector for the touchscreen show
- A neck strap
I beforehand complained concerning the lack of correct gimbal and swap safety within the T14, and Jumper listened. This time, they included a pleasant injection-molded protector, guaranteeing the radio stays protected throughout transport.
Nevertheless, there isn’t a guide included within the field, which is likely to be barely difficult for rookies. Hopefully, yow will discover some tutorials on-line to get began.
Specs and Options
- MCU: STM32F429IGT6
- Display screen: 3.5″ shade contact (decision 480*320)
- Gimbals: Corridor sensor or RDC90
- Constructed-in RF: ExpressLRS (915MHz or 2.4GHz)
- Transmission energy: 1000mW (max 30dBm)
- Exterior module interface: normal JR module bay (JR / FrSKY / Crossfire suitable)
- TF card: built-in reminiscence chip
- Working voltage: 6V – 8.4V
- Battery Required: 21700*2 (not included)
- Dimension: 185*175*79mm
- Weight:
- 538g (with out battery)
- 628g (with 18650)
- 672g (with 21700)
Lovely Contact Display screen
Based on Jumper, the T15 combines the perfect options of the T14 and T16 fashions. It has the identical housing and ergonomic design because the T14, nevertheless it options related vibrant shade contact display screen of the T16.
The three.5-inch shade show, boasting a 480×320 decision, is high-definition and able to displaying small printed textual content with readability. This high-quality show is a major improve in comparison with earlier fashions and units the T15 aside from different radios in its class. The display screen shouldn’t be solely visually interesting but additionally useful, permitting you to navigate menus along with your fingers in addition to the buttons. The brightness is adequate for outside use.
Design and Construct High quality
The Jumper T15 is comparable in dimension to the T14 however consists of further buttons and options. The T15 is significantly taller than the T20S, primarily as a result of bigger shade display screen, nevertheless it has cleaner management structure on account of fewer buttons and sliders. Nevertheless, the fabric used within the T15, just like the housing and plastic scroll wheel, offers a barely low-cost and flimsy really feel, just like what you get within the T14.
The T15 has a sq. form, just like the TBS Mambo and Radiomaster Boxer. It affords ergonomics akin to full-size radios just like the TX16S however is barely extra compact.
On the highest, the transmitter encompasses a foldable deal with, a DFU button for firmware updates, and a coach port.
The T15’s antenna is non-removable, however the case has provisions for added antenna choices. You’ll be able to take away the rubber plugs and set up completely different antenna configurations if wanted. This flexibility is a pleasant contact for superior customers who wish to customise their setup.
Gimbals and Switches
The T15 is supplied with Corridor sensor gimbals, with the choice to improve to extra premium RDC90 potentiometer gimbals for an additional $30-$40. Whereas Jumper claims the RDC90 gimbals are superior, I couldn’t inform a lot distinction when making an attempt them again to again.
On paper, Corridor sensor gimbals ought to last more than conventional potentiometer gimbals just like the RC90, however usually, longevity isn’t a serious concern as you’ll probably improve to a more recent radio earlier than they put on out. For many customers, particularly rookies, I’d suggest the extra reasonably priced Corridor gimbals. They’re easy, exact, and comfy whether or not you’re a thumber or a pincher.
The structure of the switches and buttons carefully matches that of the Radiomaster Boxer.
On the entrance, there are 4 switches, one 2-position and one 3-position switches on both sides. Two rotatory dials within the center. Under the dials, you’ve gotten the ability button between the 2 gimbals.
The shoulder button-style switches could be changed with stick-style switches (bought individually), a function that many pilots will admire.
The T15 additionally consists of six further “flight mode” buttons on the entrance plate, that are absent within the T14. These buttons have backlit LED and double because the battery degree indicator when charging.
Ergonomics and Really feel
The radio is ergonomically designed with rubberized grips on the again, offering a safe maintain and guaranteeing it sits comfortably in your arms throughout use. The T15 weighs 538 grams with out the battery, making it significantly heavier than the T20S (447g) and T14 (503g), and related in weight to the Boxer (529g). This weight distinction can affect your desire, particularly throughout lengthy flying periods.
The T15 feels well-balanced, making it snug to make use of for prolonged durations. The neck strap hook is completely positioned; when utilizing two 21700 cells, the radio is completely balanced.
By way of gimbal really feel, the T15 affords barely much less throw and looser springs in comparison with the Boxer out of the field. This is likely to be preferable for thumb pilots, whereas hybrid pinchers or pilots preferring firmer springs may lean in direction of the Boxer. Gimbal rigidity could be adjusted by disassembling the radio, so it’s not a deal breaker.
Nevertheless, as I discussed within the T14 overview, the switches are a bit too far to achieve on this radio design, and you need to stretch your fingers extra in comparison with the Boxer, however you’ll be able to in all probability get used to that with some utilization.
Different Options and Performance
The again of the Jumper T15 encompasses a foldable deal with, a regular JR module compartment for including a Crossfire or 4in1 module, and a fan to maintain the interior RF module cool when working at excessive output energy.
The T15 has a barely simplified management interface in comparison with the Radiomaster Boxer by combining the 2 web page buttons. The scroll wheel on the T14, regardless of being plastic, affords easy operation. The Radiomaster Boxer, alternatively, has a metallic scroll wheel that feels extra premium.
Energy Consumption and Battery Life
Present draw varies relying on the RF energy setting. Listed here are the measurements from my testing (with the display screen at minimal brightness):
- 0.12A with Inner RF module turned off
- 0.32A at 25mW
- 0.45A at 50mW
- 0.51A at 100mW
- 0.66A at 250mW
- 0.78A at 500mW
- 0.89A at 1W
The measurements are just like the T14.
Utilizing 21700 4500mAh cells, you’ll be able to anticipate round 8 to 9 hours of runtime at 25mW or roughly 4 hours at 1W. With 18650 3000mAh cells, this drops to roughly 6 hours at 25mW or about 3 hours at 1W. Observe that that is solely a tough estimation.
To optimize battery life, you’ll be able to make the most of the Dynamic Energy choice out there within the ExpressLRS LUA script. With Dynamic Energy, the mW output adapts to the mannequin’s vary, sign power, and hyperlink high quality, minimizing energy consumption. This function permits for as little as 25mW utilization throughout unobstructed line-of-sight flights.
Battery and Charging
The T15 comes with a tray for 21700 lithium-ion cells, nevertheless it additionally helps 18650 cells in case you bend the metallic contacts. 2S LiPo additionally works so long as it matches within the battery bay.
The T15 helps charging by way of USB-C port, which is handy. When charging, the backlit flight mode buttons double as battery degree indicators.
Jumper addressed the gradual charging problem I discovered when reviewing the T20S. The T15’s charging charge now reaches as much as 10W. Observe that you will want an influence adapter that helps 5V 2A or larger; charging from a pc’s USB port might lead to slower cost occasions.
Estimated charging occasions are as follows:
- 21700 4500mAh batteries: Roughly 4-5 hours
- 18650 3000mAh batteries: Slightly below 3 hours
Additionally they mounted the bug within the T14, the place the T14 would energy on when plugged in for charging (I imagine they mounted that in later firmware updates).
FPV Simulator Assist
The Jumper T15 is plug and play with common FPV simulators equivalent to Tryp and Liftoff. When linked, it’s robotically acknowledged within the simulator. The setup stays the identical as all different mainstream remotes.
Inner RF Module
The T15 encompasses a built-in 2.4GHz ExpressLRS RF module that comes with ELRS 3.3.2 firmware. The system goal “T-15 2G4 TX” is obtainable within the newest configurator (V1.7.2), so you could flash it to the newest firmware model 3.4.2 if you want. It additionally helps the ELRS Backpack function.
Gemini mode shouldn’t be supported by the T15, you’ll be able to nonetheless, set up a Gemini module on the again module bay. One module I can suggest is the BetaFPV SuperG TX module which I’ve examined with first rate outcomes: https://oscarliang.com/betafpv-superg-nano-transmitter-module/
If you’re new to ExpressLRS, try my detailed setup information: https://oscarliang.com/setup-expresslrs-2-4ghz/
Radio Firmware
The Jumper T15 comes preinstalled with EdgeTX firmware, which is presently essentially the most extensively used radio firmware within the FPV group. The firmware model is “Manufacturing unit Firmware,” nevertheless it exhibits “2.10.1 Self Construct” on the startup display screen. The firmware goal is edgetx-T15.
A notable function of the T15 is its elimination of the SD card slot. As a substitute, it comes with onboard 512MB flash reminiscence, which serves as storage for mannequin photos, audio information, and radio backups. This implies you received’t must buy an SD card individually.
You’ll be able to entry the storage by way of the USB-C port: join the cable whereas the radio is energetic, and when prompted, choose the USB Storage (SD) choice.
When you don’t must mess with the firmware when the radio arrives, it’s actually doable to flash EdgeTX firmware utilizing one of many two strategies described in my tutorial: https://oscarliang.com/flash-edgetx/
Output Energy Testing
Listed here are the ability measurements of the Jumper T-15’s inner module at completely different output energy ranges.
| Energy Ranges | 25mW | 50mW | 100mW | 250mW | 500mW | 1W |
| T15 Inner Module | 54mW | 103mW | 215mW | 429mW | 615mW | 1.04W |
These measurements, taken utilizing the ImmersionRC Energy meter V2, exhibit the accuracy of the manufacturing facility calibration and the utmost output energy. It’s necessary to notice that these measurements replicate the consistency and efficiency of the interior module slightly than the {hardware} high quality.
After working the T-15 at its most 1W output energy for 20 minutes, it settled round 1.04W. This spectacular energy stability demonstrates the effectiveness of the cooling system.
Tear Down and Inner Design
Disassembling the T15 is easy, with solely six screws holding the back and front housing collectively.
The inner PCB design seems to be nearly an identical to the T14. All wires are silicone, and many of the parts are linked by way of connectors, making repairs and upkeep very straightforward.
Conclusion
The Jumper T15 principally does all the things the Jumper T16 and Radiomaster TX16S do however within the extra compact type issue of the Boxer and T14. For simply $20 greater than the Boxer, you get a vibrant shade touchscreen, which is a compelling function for some folks.
You will get the Jumper T15 radio from:
The T15 is a well-rounded radio that gives glorious worth for its worth. It’s appropriate for each rookies and skilled pilots, because of its user-friendly interface and high-quality gimbals. Whereas the supplies used depart one thing to be desired, it strikes an excellent stability between options and value.
