Jumper isn’t taking a break! Shortly after the discharge of the T20S, they’ve launched the T14, a radio that bears a hanging resemblance to the Radiomaster Boxer and TBS Mambo however stands out with its distinctive options. On this assessment, I’ll go over these options and evaluate the T14 to the Boxer and T20S, serving to you determine which radio it is best to get.
New to FPV? You’ll be able to be taught extra about FPV drone radio transmitters on this purchaser’s information: https://oscarliang.com/radio-transmitter/
The place To Purchase?
Get your Jumper T14 radio from these distributors:
Gimbal Choices
The Jumper T14 is out there in two variations: one with Corridor gimbals at $89.99, and a pricier one at $109.99 that includes RDC90 gimbals—present in high-end radios just like the Futaba T18MZ. Some argue that RDC90 gimbals present extra linear outputs than their Corridor counterparts, however in my expertise, I didn’t discover a big distinction in smoothness or management really feel.
In the event you’re a kind of individuals who consider in “costlier is all the time higher” then by all means get the RDC90. Nevertheless, I feel the Corridor gimbals are completely high quality for most individuals, particularly given their extra inexpensive price ticket.
Frequency Choices
The Jumper T14 comes outfitted with an ExpressLRS inner module, providing three frequency selections: 2.4GHz, 868MHz, and 915MHz. Personally I want 2.4GHz — that’s the one I’m specializing in on this assessment. Why? It presents distinctive vary that fits my wants (as much as tens of kilometers) and comes with notably smaller antennas in comparison with the decrease frequency 900Mhz choices. Study extra concerning the execs and cons of those frequencies right here: https://oscarliang.com/expresslrs/#24GHz-vs-900MHz
Equipment
Within the field, you could find the next equipment:
- Neck strap
- Fast begin consumer handbook
- USB-C cable
- Spare springs for gimbals
- Two change replacements
Just like the Boxer, it comes with a carry case. Nevertheless, it lacks a devoted gimbal/change protector, as a substitute offering two easy foam rolls to guard the sticks.
Specs and Options
- MCU: STM32F407ZET6
- Display screen: OLED Show
- Display screen measurement: 2.42″ (decision 128*64)
- Rocker Stick Measurement: Customary
- Gimbals: Corridor sensor or RDC90
- Constructed-in RF: ExpressLRS (915MHz or 2.4GHz)
- Transmission energy: 1000mW (max 30dBm)
- Exterior module interface: commonplace JR module bay (JR / FrSKY / Crossfire appropriate)
- TF card: built-in chip (formally advisable by EDGETX)
- Working voltage: 6V – 8.4V
- Battery Required: 21700*2 (not included)
- Measurement: 185*175*79mm
- Weight:
471g503g (with out battery)- 593g with 18650
- 637g with 21700
Construct and Design
At first look, the T14 appears to be like similar to the Boxer – the housing can be product of plastic with a black matte end, that includes a well-known association of switches and a comparable structure. The plastic shell of the T14 feels barely cheaper and extra flimsy, however contemplating the value, that is sensible.
It’s not precisely a direct copy although, there are some substantial variations as I’ll clarify on this assessment.
Measurement and Weight
Although being related in top and thickness, the T14 is considerably wider than the Boxer. Nevertheless, it’s the lighter of the 2 by about 30 grams. Each fashions boast flat bases, permitting them to face upright on a flat floor, which is all the time a plus in my e-book.
Stacked towards the Jumper T20S, the T14’s bigger measurement is obvious regardless of having fewer controls. The structure due to this fact is appears to be like much less cramped. Regardless of being considerably larger, the T14 solely weighs 50g extra.
Gimbals
My T14 assessment unit got here outfitted with RDC90 gimbals. Evaluating these to the Corridor sensor gimbals of the Boxer and TX16S, I discovered no vital distinction in management smoothness. The RDC90s do enable for stick journey changes; nevertheless, I discovered the default configuration too slim for me as a pincher and I needed to improve all of it the way in which to the max to really feel exact in my flying. Thumbers would possibly discover smaller stick journey extra to their liking, it’s actually a private choice.
A notable draw back is the gimbal stress adjustment. Not like the Boxer, the place changes are a breeze from the entrance, the T14 requires a bit extra effort, as you could open up the radio to make modifications.
The stick ends, too, left one thing to be desired. They felt too skinny and lacked adequate grip for my style. A fast swap for third-party stick ends, just like the Radiomaster Sticky360, made a world of distinction. Keep in mind, these gimbals have M3 threads, so be sure to get stick ends which might be appropriate.
Switches and Controls
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 may have the ability button between the 2 gimbals. Not like the Boxer, the place the standing LED is constructed into the ability button, Jumper moved the standing LED to the edges of the display screen.
The shoulder of the radio options two low-profile, button type switches. The left is a latching change and the appropriate a momentary one, identical to the Boxer. In the event you’re not a fan of those button type switches, Jumper has thoughtfully supplied stick-style replacements. Nevertheless, each are latching, with no momentary choice.
Word that there aren’t any “flight mode” buttons on the T14, which may very well be a disappointment for some. On the brilliant aspect, it makes a cleaner structure by eradicating these buttons. Personally I not often use them so I’m positive it’s not an issue for many individuals.
Display screen, Buttons and Menu
Navigating the T14’s menu is simple, due to a normal button structure and scroll wheel in Jumper’s radios. The plastic scroll wheel might really feel low-cost in comparison with the Boxer’s metallic one. And the scroll wheel is a bit slippery and simple to pick out the mistaken choice.
The place the T14 actually shines is its monochrome OLED display screen. It’s a step above the Boxer’s LCD display screen, providing clear visibility in varied lighting situations, even direct daylight—no backlight wanted.
Antenna
Whereas not detachable, the onboard, foldable antenna is a one other space that the T14 excels, making it travel-friendly and simple to pack. It may be rotated as much as 180 levels for optimum angle. It’s value noting that for optimum efficiency, it’s essential to align your TX antenna together with your RX antenna – making certain a constant, sturdy sign. You’ll be able to seek advice from my tutorial on antenna placement for extra insights: https://oscarliang.com/antenna-positioning/
The draw back nevertheless, is you can’t swap out the antenna for a distinct one, e.g. the next achieve antenna. However I doubt many would do this anyway so it’s not likely a deal breaker.
Internally, the antenna is linked to the RF module by way of a UFL connector. Apparently, the antenna’s plastic housing appears outsized for two.4Ghz. I suppose they’re utilizing the identical mould for each 2.4GHz and 900MHz to save lots of prices, however they may have clearly made it smaller for two.4GHz.
Connectors and Speaker
On prime, you may have the USB-C port for FPV simulator, information switch and firmware updates. Additionally there’s the coach port (3.5mm audio jack).
The speaker, positioned above the ability button, doesn’t fairly match the Boxer’s audio high quality or quantity, but it surely’s a minor setback that doesn’t have an effect on utilization.
Again Deal with and Neck Strap
The T14 includes a foldable plastic again deal with, whereas the Boxer opts for a cloth one. Which one is best is determined by your requirement, every has its execs and cons.
The neck strap hook location is spot on with the battery put in, the radio completely steadiness on a neck strap.
Ergonomics
Dealing with the T14 feels acquainted if you happen to’ve used the Boxer, due to their related form and weight.
Nevertheless, the anti-slip rubber inserts on the again of the T14 really feel barely cheaper than those within the Boxer, and are much less grippy. They’re adequate, although, particularly when contemplating the T14’s aggressive value.
Whether or not you’re a thumber, or a hybrid pincher, the T14 has you lined. Holding it feels pure, the gimbals are clean and comfortable out of the field with out the necessity for any adjustment, aside from throttle which I needed to loosen a tiny bit extra.
My primary criticism can be the entrance switches, that are positioned barely additional away from the edges in comparison with the Boxer. It makes it more durable to achieve the internal switches – you sort of need to take your hand off the stick to achieve it. On the Boxer, these switches are extra accessible.
Exterior Module Assist
The T14 has a JR module bay on the again that helps exterior modules, appropriate with full measurement modules like Crossfire, different ExpressLRS modules, Ghost, Tracer and many others.
Battery Choices
The Jumper T14 comes with a battery holder that may match two 18650 or 21700 Li-ion cells. To make use of 18650 on this holder, make certain to tug the contacts outwards in order that they maintain the smaller 18650 cells securely.
Batteries aren’t included, and should be bought individually. Get them right here:
21700 Li-ion cells:
18650 Li-ion cells:
Energy Consumption and Battery Life
Present draw varies relying on the RF energy setting, right here’s the measurements from my testing:
- 0.11A with RF module turned off
- 0.45A at 25mW
- 0.67A at 250mW
- 0.80A at 500mW
- 0.90A at 1W
By default he fan is configured to activate at 10mW, which suggests it’s just about all the time working. This results in increased present draw than different ExpressLRS radios I’ve examined at decrease energy ranges. I’m unsure if that is intentional by Jumper, as most ELRS radios I’ve encountered usually activate cooling fan at 250mW or increased. Anyway I left this settings at default for the remainder of the check.
Utilizing 21700 4500mAh cells, you may anticipate round 8 to 9 hours of run time at 25mW, or roughly 4 hours at 1W. With the 18650 3000mAh cells, this drops to roughly 6 hours at 25mW or about 3 hours at 1W. Word: that is solely a tough estimation.
To optimize battery life, you may 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 characteristic permits for as little as 10-25mW utilization throughout unobstructed line-of-sight flights.
Battery Charging
You’ll be able to cost the battery by way of the USB-C port.
Jumper appears to have mounted the gradual charging concern I raised when reviewing the T20S. The T14’s charging charges now attain as much as 10W, over twice as quick as earlier than. Word that you will want an influence adapter that assist at the least 5V 2A or increased, utilizing 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
Nevertheless, there’s a quirk: the radio powers on robotically when plugged in for charging, which looks as if a bug. Hopefully this could get addressed in future firmware updates. For now I simply change to the “Simulator” profile throughout charging, which ensures each inner and exterior RF modules are turned off.
FPV Simulator Assist
The Jumper T14 is plug and play with in style FPV simulators similar to Tryp and Liftoff. When linked, it’s robotically acknowledged within the simulator. The setup stays the identical as all different mainstream remotes.
Inside RF Module
The T14 options an built-in ExpressLRS module that comes with ELRS 3.3.1 firmware. I’m unable to replace this module but to the newest 3.3.2 because the system goal “T-14 2G4 TX” has not but been added. Hopefully it would in future releases. It additionally helps ELRS Backpack characteristic.
Sadly, Gemini mode isn’t supported by the T14. Hopefully Jumper will launch a Gemini succesful T14 sooner or later. For now you need to use the BetaFPV SuperG TX module which I’ve examined with respectable outcomes: https://oscarliang.com/betafpv-superg-nano-transmitter-module/
If you’re new to ExpressLRS, take a look at my detailed setup information: https://oscarliang.com/setup-expresslrs-2-4ghz/
Radio Firmware
The Jumper T14 comes preinstalled with EdgeTX firmware, which is presently probably the most extensively used radio firmware within the FPV group. Firmware model is 2.10.0-selfbuild. Firmware goal is T14.
A notable characteristic concerning the T14 is its elimination of the SD card slot. And no, it’s not an oversight. In reality, the T14 doesn’t even require an SD card. As a substitute, it comes with an onboard 512MB flash reminiscence. This serves as a storage for what’s usually known as “SD Content material” the place mannequin photographs, audio information and radio backups are saved. Which means you gained’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, when prompted, choose the USB Storage (SD) choice.
When you seemingly gained’t must mess with firmware when the radio arrives, it’s actually potential to flash EdgeTX firmware utilizing one of many two strategies described in my tutorial: https://oscarliang.com/flash-edgetx/
Output Energy Testing
Listed below are the ability measurements of the Jumper T-14’s inner module at totally different output energy ranges.
This check was achieved beneath ELRS firmware model 3.3.1. I couldn’t replace to the newest 3.3.2, as T-14 2G4 TX goal has not made it to the system record but. Hopefully it is going to be out there within the subsequent launch.
| Energy Ranges | 25mW | 50mW | 100mW | 250mW | 500mW | 1W |
| T14 Inside Module | 55mW | 103mW | 216mW | 448mW | 610mW | 840mW |
These measurements had been taken utilizing the ImmersionRC Energy meter V2 and show the accuracy of the manufacturing facility calibration and whether or not the utmost output energy meets expectations. It’s necessary to notice that these measurements don’t mirror the {hardware} high quality, however moderately the consistency and efficiency of the interior module
After working the T-14 at its most 1W output energy for 20 minutes, it settled round 815mW. Regardless of the extreme output energy in decrease settings, the efficiency of most setting is akin to that of the Radiomaster Boxer.
Tear Down
Taking aside the T14 was surprisingly simpler than the T20S, requiring the removing of solely 4 screws with out touching the rubber inserts.
The back and front housing are linked by way of 2 cables, which look like for the interior and exterior RF module. The improved construct high quality was evident, with all switches’ solder joints protected by glue. The eye to element is nice to see.
The general design is considerably much less complicated in comparison with the earlier T20S, making restore and future modifications a lot simpler.
Listed below are some shut up photographs of the highest and backside PCB.
Conclusion
The Jumper T14 presents versatility and worth for FPV pilots, regardless of its few quirks.
Get your Jumper T14 radio from these distributors:
T14 vs Boxer
In terms of selecting between the T14 and the Boxer, it boils all the way down to what you worth most in a transmitter.
Ergonomics clever, each radios really feel related in hand, however the Boxer presents higher grip. Additionally I really feel just like the switches on the Boxer are simpler to achieve than the T14 with out stretching your fingers an excessive amount of.
The T14’s superior OLED display screen and cleaner structure make menu navigation a pleasure. But, when it comes to construct high quality, the Boxer has a slight edge, feeling extra sturdy regardless of the T14’s extra enticing value level.
See my assessment of the Radiomaster Boxer: https://oscarliang.com/radiomaster-boxer/
Test costs of the Boxer:
T14 vs T20S
In the event you’re deciding between the T14 and the T20S, take into account the T14’s benefit of a bigger display screen and exterior modules assist while not having an adapter. The T14 additionally stands out for its simplicity for restore and mods. The interior construct high quality has improved noticeably in comparison with the T20S.
For individuals who prioritize compact kind issue, you would possibly discover the T20S a extra compelling choice. However, it presents extra options and performance whereas being a smaller radio. Positive, the T20S additionally helps exterior module, but it surely requires a module adapter. If you wish to go together with the T20S you actually ought to keep away from utilizing exterior module because it ruins the compact kind issue.
See my assessment of the Jumper T20S: https://oscarliang.com/jumper-t20s-gemini/
