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HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › futaba 2.4ghz or JR 2.4ghz
04-03-2009 12:37 AM  9 years agoPost 1
mr-amgoo

rrApprentice

EDINBURGH, SCOTLAND

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Hi Guy's

i came across a web site

http://www.rcheliwiki.com/2%2C4GHz

what do you guy's think is the best system to get

A number of manufacturer's have produced radio equipment that uses the 2.4GHz band.

Futaba has FASST.
Spektrum has DSM (now superseded by DSM2).
JR usually use Spektrum's DSM2 system, but they have their own DSMJ system for use only in Japan.

broadly, 2.4GHz equipment works in one of two ways.

The transmitter can find one or more 'empty' channels and broadcast on those until the transmitter is reset. The receiver will scan all frequencies at startup for its paired transmitter, and then listen on only those broadcast frequencies.
The transmitter can skip 'randomly' from one channel to another, only remaining on each channel for a fraction of a second. Once the receiver detects a transmission from it's paired transmitter, it can guess which channel the transmitter will jump to next and so maintain the radio link. This is known as 'Frequency Hopping Spread Spectrum' (FHSS).
The allowed power output for the first method is often much lower than the power output for the second method. While Futaba's FASST is a true FHSS system, Spektrum's DSM is a 'Direct Sequence Spread Spectrum' (DSSS) system, which switches rapidly between only two frequencies; in Japan this was not considered sufficiently 'spread' to qualify for the higher (100mW) power output and would have been limited to only 10mW. This prompted JR to develop the FHSS DSMJ protocol. Some rumors suggest there may be some discussion within the EU about whether any new licenses for DSSS systems will be granted for the higher output power (currently granted licenses should continue to be valid, however).

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04-03-2009 12:40 AM  9 years agoPost 2
bkervaski

rrElite Veteran

Birmingham, AL, USA

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If you can afford a Futaba 12fg/12z/14mz then go Futaba w/FAAST. Otherwise, go JR/Spektrum/DSMx. On the JR Side, I think the 9303 is the best overall value.

On the Futaba side, I wouldn't trade my 12Z for anything, by far the best radio I've ever used.

The key for the best performance is to use a pure PCM2048 system where the TX and RX both support PCM2048.

A good radio will last a long time and worth the money, imho.

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04-03-2009 12:52 AM  9 years agoPost 3
Steff Giguere

rrProfessor

St-Eustache, Quebec, Canada

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I think they are all great companies, each with their pluses and minuses. Therefore if you are used to Futaba programming stay with them, but if you are used to JR/Spektrum then stay with them.
I myself own a 10C from Futaba and can't be happier.

Team Synergy, Rail blades, Team Scorpion, V-Team

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04-03-2009 12:56 AM  9 years agoPost 4
Tyler

rrElite Veteran

Chicagoland area

My Posts: All  Forum  Topic

Airtronics
check out the new airtronics offering at the Toledo show. The features and price should be spectacular to say the least. I wish I could attend Toledo to see it myself.

Tyler

Enjoy things that money can buy IF you don't lose the things money can't buy.

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04-03-2009 12:57 AM  9 years agoPost 5
smallplanes

rrElite Veteran

S.C. ,SSA

My Posts: All  Forum  Topic

Buy what people around you have no matter if its JR or Futaba. I think there both good systems.


Spectra G 26cc
Jewel
Bat 27cc
Trex 700<br

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