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HomeRC & PowerAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › JR 8103 Radio and Spectrum Module Questions
01-25-2016 04:07 AM  35 months agoPost 1
Toddsnake

rrNovice

Dallas TX

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Looking to upgrade my JR 8103 FM Radio to 2.4ghz. The upgrade from JR is the JRP03664 priced at $282 vs. the Spectrum RC DSM2 for $109. What are the Pros and Cons of each of these choices? Is the JR worth the money or is its technology better for some reason, thus the higher price?
I am using the JR servos that came with the radio, will they still plug into the Spectrum receiver?

Thanks for any info!

Todd

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01-25-2016 04:46 AM  35 months agoPost 2
dkshema

rrMaster

Cedar Rapids, IA

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The servos will plug into just about any current receiver on the market.

I have an 8103, a nice radio for its time. But time marches on. It's now my Sim radio.

You would be much better off at this stage to simply buy a current radio instead of messing with the 2.4 Ghz upgrade modules.

The JR module uses DMSS encoding, the Spektrum module uses DSM2 encoding of the transmitted signal.

Without wanting to start yet another "my technology is better than your technology" thread, I will simply state each one works well. Keep in mind they are NOT compatible with each other. Once you go JR, you're stuck buying JR DMSS receivers. Once you go the Spektrum route, you buy Spektrum receivers (although there are some good third-party DSM2 and DSMx receivers out in the market today).

Instead of going the 8103 upgrade route, you should seriously consider replacing the 8103 with a current radio, whether its a Spektrum DX7 or 9, or a JR XG-8.

The DX7 with an 8-channel RX is about $300, not much more than the JR module system. The DX9 is a bit more pricey at $600. This series of radios will work with all DSMx and DSM2 receivers.

If you want to go the JR route, the XG-8 is about $415. This will work only with JR DMSS receivers.

I'll guess your servos are JR NES-537's, those are quite long in the tooth as well.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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01-25-2016 05:18 AM  35 months agoPost 3
Pistol Pete

rrProfessor

Seffner, FL

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Before I replaced my 8103 with a newer radio, I used THIS module with a few Rxs to get my feet wet in the 2.4Ghz until I was ready to give the radio up and convert all models.. What a difference it made then, specially for the gasser.

I purchased it from them as well. The long range FPVs guys trusted it back then and so did I and never regreted it.

Still have it but radio has been demoted to sim duty.

Edited:
Module uses Fasst technology.

~~Enjoying the hobby one flight at a time~~

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01-25-2016 02:33 PM  35 months agoPost 4
Jim Cimino

rrKey Veteran

NE Pennsylvania

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I used a module in JR 9303 and it worked ok, I did find that there were some programming issues with the spektrum receivers when trying to use two of them. I would agree that the 8103 was a good radio and may be fine for your needs, but you can probably find a food used 9303 that is already 2.4 ghz for around 250. Used radios sell pretty cheap and the technology is much better on the newer radios.

Team Synergy, Team Scorpion, No good deed goes unpunished

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01-27-2016 02:23 AM  35 months agoPost 5
dkshema

rrMaster

Cedar Rapids, IA

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Hmmm -- I have an X9303 that I'm not using, it was replaced this past summer by my DX18.

Many years ago, it may have been wise to hedge your bets just a bit on whether or not 2.4 GHz would be a real, viable option. Those days are long gone. Many 2.4 GHz systems are now in their 2nd or 3rd Generation and the technology has been well proved out.

-----
Dave

* Making the World Better -- One Helicopter at a time! *

Team Heliproz

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