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JR X-2720 Radio

X-2720 PLL Transmitter
w/nicad Only

JR X-2720 Overview

If you’re ready to move up to a 7-Channel radio, this is the one you’ve been waiting for. With its breakthrough features along with the unmistakable feel of JR quality, the JR X-2720 is everything a serious sport flyer dreams of.

And speaking of breakthrough features, let’s start with one you’ll really appreciate.

NO MORE EXTRA CRYSTALS TO CHANGE CHANNELS

Since we have so many frequencies to work with, it’s rare to find several other flyers using your channel. But when it does happen, all you can do is wait your turn or plug in another set of crystals.

Well, the JR X-2720 ends that problem right off the bat. You’ll just check for the least-used channels at your field, program one into your transmitter, touch your RS77S ScanSelect receiver’s “scan” button, bring your transmitter close and it’ll tune to your programmed channel automatically.

PCM PRECISION ISN’T JUST FOR THE PROS ANYMORE

You’ve probably noticed that competition flyers always fly with PCM modulation, and there are good reasons why they do. Modern PCM receivers offer unmatched accuracy of control plus an additional layer of resistance to interference.

And as an advanced sport flyer, we figured you deserved the same advantage. This is the reason we equipped your JR X-2720 with the RS77S ScanSelect PCM receiver.
And by the way. The JR X-2720 is compatible with all previous JR receivers – PCM and FM – so it won’t make your existing equipment obsolete.

SUPERB SERVOS, 20-MODEL MEMORY AND MORE

Let’s start with the “and more” part. As you can see in the large photo of the JR X-2720 transmitter, its display is unlike anything in its class – more detailed and independent of fixed elements. Which means it makes programming easier to comprehend and even easier to execute.

Next, the 2720’s servos – the new zero deadband, 5.2kg/cm of torque, DS589 digitals – not only out-perform those of competing systems, and they feature special ultra-tough Carbonite resin gears for long-lasting, precise performance.

And finally, it has the entire programmable features airplane and heli enthusiasts need to get the best out of their models, plus it’s an absolutely unbeatable value.
So don’t leave your JR X-2720 waiting with us. After all, when there’s the 2720, why would you even think of settling for anything less?

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JR X-2720 Key Features:

  • Fully synthesised and crystal-free
  • No frequency dials to turn
  • Improved programming with more mixes
  • IMproved interface
  • Based on proven 3810 package
  • 20-model memory
  • RS77S receiver & DS589 servos included

JR X-2720 Programming Features:

System Mode:

  • Model Select
  • Model Name
  • Model type Select
  • Modulation Select
  • Model reset
  • Trainer system select
  • Throttle Recovery
  • Input Select (Switch Select-ability for Aux 2 and Gear)
  • Wing type
  • Swashplate type
  • Frequency Selection (Ch 601 - 659)
  • Dual Rate Switch Select

Airplane Function Mode:

  • Dual Rates
  • Exponential
  • Servo Reverse
  • Sub trim
  • Travel Adjust
  • Elevator to Flap Mix
  • Aileron To Rudder Mix
  • Flap System
  • Differential
  • Programmable Mix (1-6)
  • Fail Safe
  • Servo monitor

Helicopter Function Mode:

  • Dual Rates
  • Exponential
  • Servo Reverse
  • Sub trim
  • Travel Adjust
  • Swashplate Mix
  • Throttle Hold
  • Throttle Curve (3) (5 pt mix)
  • Pitch Curve (4) (5 pt mix)
  • Revolution Mix
  • Gyro Sensing
  • Fail Safe
  • Servo monitor

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Transmitter Specifications:

  • Multifunction 7 channel radio
  • User-friendly graphic display computer system
  • Comfortable fitted computer-designed, ergonomically styled transmitter case.
  • Advanced digital trim
  • Adjustable spring tensions and length by the ultra precision control sticks
  • Full PLL Synthesiser transmitter software (crystal free)
  • Fail safe function with SPCM modulation
  • Trainer function as standard equipment
  • Charging battery jack is fitted as a standard equipment
  • SPCM and PPM (FM) are available
  • Model name, data copy function
  • Same switch layout for heli and aero type
  • 20 model memory
  • 9.6V 1500mAh rechargeable battery included
  • 36MHz

Receiver Specifications:

  • Model Number: RS77S SPCM
  • Small and slimline design 7 channel receiver
  • FM-NEW ABC & W system makes R770 high sensitive.
  • A narrow band ceramic filter for high-signal selectivity assists in rejecting cross modulations from other common radio frequencies, such as RC transmitters for local paging systems.
  • S type PCM receiver developed by advanced digital technique using a high-reliability and super small micro computer
  • Fail safe function is operable.
  • Direct servo control for control servos without radio frequency output.

Servos:

  • Type: DS589
  • Torque:5.2kg.cm
  • Speed:0.21 sec
  • Weight: 42 gm
  • Size mm (LxWxH): 32.5 x 19 x 38.5mm
  • Ball bearing: Yes
  • Motor: Ferrite
  • Gears: Resin Carbonite

Charger:

  • Input Voltage: AC-240V
  • Output Current: 50mA TX/100 mA RX
  • Charging Time: 15-20 Hours

Includes/Requires:

  • 1 x Transmitter incl 9.6V 1500mAh battery
  • 1 x RS77S Auto-scan PLL-Synthesized 7 channel SPCM receiver
  • 4 x DS589 servos w/ hardware
  • 1 x 4N1100 Ni-Cd 4.8V/1100mah battery
  • 1 x RX & TX battery charger NEC-322AUS AC240V
  • 1 x switch harness
  • 1 x Manual ( ENGLISH version )
 
 

[JRP2720] X-2720 PCM 7-Channel PLL Computer Set, with RS77S Receiver, 4 x DS589 Servos (carbonite gears), NiCads

 

The newest and latest to R/C modelling at model flight[JRP2720] X-2720 PCM 7 channel PLL Computer set, with RS77S Rx, 4x589 servos, nicads

[JRP2720.2] X-2720 7 channel PLL Transmitter, RS77S Rx
[JRP2720.H] X-2720 PCM PLL Heli set, 5 servos, G410 gyro
[JRP2720TX] X-2720 PLL Transmitter w/nicad
 
 

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Model Flight tries to answer your questions about RC models. These come directly from our modelling staff at Model Flight. 

What is PCM and PPM?

 
The PCM receiver is a digital receiver that uses normal FM Frequency, but the signal is an encoded digital signal in which the PCM receiver interprets it as commands. Since the signal is digital, if there are any interference or the signal is poor, the PCM receiver can be programmed to go into a fail-safe mode. In this mode, the servos will move to a pre-programmed position until the signal comes back.

PPM receivers are the "standard" type of receiver for most radios. Glitches in signal are immediately noticed by erratic movements of the servos.

JR's computerised radios give you the best of both worlds with each transmitter software switchable between PPM FM and PCM for superior interference rejection.

 

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