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HomeAircraftHelicopterRadio - Servo - Gyro - Gov - Batt › new JR 9303 radio question
12-10-2004 01:45 AM  13 years agoPost 1
torque

rrKey Veteran

bolivia , north carolina

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i am pondering on getting a 9303. can i get some feed back on the
use of the radio. i fly only helicotpers. thanks.

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12-10-2004 10:20 PM  13 years agoPost 2
EVO Newbie

rrNovice

Southampton, MA

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I just bought one... nice radio.. sorely lacking in safety and convenience features like a Throttle Cut switch... If you have Hi-Tec or Futaba RXs they may not work since JR is Positive Shift and Hi-Tec/Futaba are Negative Shift.

Further, make sure you get Single Conversion JR crystals for the TX... You can use single or dual conversion crystals for your Rx... whatever it takes. Too bad the 9303 is not Synthesized... like my old Hi-Tec Eclipse 7.... Best $225 I ever spent for Helis and planks...

You have to order the DSC cable separately $10, but that allows you to tweak your servo setup without broadcasting on your FM channel and dorking someone flying in their living room... it does happen....

The Setup Menus and selection process is very intuitive. Comfortable in the hands...

PM me to compare notes if you want.

Jon Frost

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12-11-2004 01:12 AM  13 years agoPost 3
EthanEF

rrNovice

North Carolina

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Torque, the 9303 is a excellent radio. I have an 8103 which is a good radio but this one is a step up. If you have any JR equipment then you'll be very happy with this one. I have one helicopter and 2 planes set up on mine. I will eventually move all my models over to the 9303. You have 30 memories so there is plenty of room!

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12-11-2004 01:19 AM  13 years agoPost 4
torque

rrKey Veteran

bolivia , north carolina

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radio
thanks for the imputs.

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12-13-2004 03:57 PM  13 years agoPost 5
bowies12

rrApprentice

Surrey - UK

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Evo Nubie, You are confused with the TX. There is only one type of crystal. Its the Rx that is available as a single conversion or a dual conversion. Most are single conversion.

You mentioned it lacks safety and convenience features . There is a throttle cut. Also there is a Throttle hold switch which holds the engine at tickover.

I assume you use 72mhz, you didn't mention it in your post. The Positive and negative shift thing only applies to 72mhz (as far as I know) It certainly does not affect 35mhz which is used in the UK.

Hope this clears things up...
Regards Steve

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12-13-2004 04:07 PM  13 years agoPost 6
EVO Newbie

rrNovice

Southampton, MA

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Not confused... Does not have a Throttle Lock Feature...

Throttle Cut is via dropping the throttle trim which when properly adjusted will cut the engine...

JR uses Single Conversion Crystals in their Rx... Tx is not a factor....

JR uses positive Frequency shift (72Mhz), where Hi-Tec and Futaba use Negative shift....

JR does not spell out clearly in their manual about how to set up throttle cut... nor do they mention about frequency shift. These are trivial points in the long run... but if you look at the greater picture...it would be nice to have soms sort of standardization across manufacturers, similar to the standards used by Model Railroaders using Digital Command Control (DCC). All manufacturers design their products to the standard... and add features to set their products apart from others.

My point about the Throttle Lock feature is that it adds a measure of safety once you have your engine running and before your take off....

No more... no less...

Thanks.

Jon

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12-13-2004 04:34 PM  13 years agoPost 7
mrNoodles

rrProfessor

Borlänge, Sweden

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And everyone elses point is use throttle hold if you cant keep your fingers away from the throttlestick while carrying the heli to the flighline.

What if you accidently hits the throttle lock button on your HiTec?

Also if your 9303 comes with a mechanical throttle trim it goes very fast to pull it to kill the engine, a digital trim moves slower...

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12-13-2004 05:48 PM  13 years agoPost 8
bowies12

rrApprentice

Surrey - UK

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Hang on Jon,

It MOST DEFINITELY DOES have a throttle lock feature. Its just Hitec call it throttle lock. Futaba and JR call it throttle hold. You flick a switch and the throttle stays at tick over (or what ever you set) Even if the throttle joystick is moved (accidently or on purpose) the engine stays at tick over.

Your 1st post you say "Further, make sure you get Single Conversion JR crystals for the TX"
Why state the above, because there is only one type of TX crystal.

Your 2nd post you state "JR uses Single Conversion Crystals in their Rx... Tx is not a factor...."
WRONG . JR does have Dual conversion receivers in their range.

I am glad we agree about the Positive and negative shift on 72 mhz.

I also agree that the manuals for these radios can leave a lot to be desired. Futaba seem to be the worst in my experience.

And again I am with you on the standards issue. It really annoys me having to cut and trim futaba servo plugs to fit a JR receiver.

Throttle lock or throttle hold is I agree useful when carrying a machine from the pits to the takeoff pad. I use it often with both my JR and Futaba Tx's

Regards Steve

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12-13-2004 05:54 PM  13 years agoPost 9
EVO Newbie

rrNovice

Southampton, MA

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Steve and everyone else....

Thanks for your comments... all opinions are valued....

Enough Said...

Jon

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12-18-2004 04:05 AM  13 years agoPost 10
spooky007

rrApprentice

Bakersfield, Ca

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Just bought one also. Very nice radio!! Haven't had time to get familliar with it though. Definately a step up from the 8103. I do wish the version with the 8311 was few $$ cheaper, but i can't complain.


Al

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12-18-2004 09:38 AM  13 years agoPost 11
kima

rrApprentice

Wellington, New Zealand

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Hi ,

Is there alot of differance between the 9X and the 10X, at the moment i have a 3810 and need a second radio. A mate is selling a brand new 10X with every thing he has only used it for about 30 minutes. Or should i get the new 9X.

Cheers kima

K R Attwell
www.PhotoHigher.co.nz

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12-18-2004 09:49 AM  13 years agoPost 12
elektromodely

rrNovice

Kosice, Slovak Republic

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1) JR does offer dual conversion receivers too (at least R1000DS and look for other d.c. rx at http://www.grapner.de - SMC19DS,,,)
2) positive/negative shift works in 35MHz band too
3) 9303 is excellent heli radio, better than Futaba in this range IMO
4) there is no way to use Futaba PCM receivers with 9303 (PPM should work is used the right crystals)

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12-18-2004 11:39 AM  13 years agoPost 13
9387ASH

rrElite Veteran

UK

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Kima,

The 10X is geared towards the top end fliers. The only problem is that you can only get it in either Aero OR Heli version.

The 9X is a multisystem set, Aero, Heli or Glider. The 9XII ( due sometime next year ) is the equivalent of the US's 9303 and adds more functionality over the 9X. ( If you want to know the history PM me ).

The 10X combo normally comes with the JR1000DS Dual Conversion receiver, the 9X / 9XII will have the R900 ( identical to the R649 almost ).

Personally I would wait to see the price of the 9XII before commiting, but would imagine it to be only a little bit more than the 9X. In fact the price of the 9XII has just been posted on the MacGregor Website in the price & availability section. How that would translate in your neck of the woods I don't know.

wrt to elektromodely, I am certain that the shift issue is purely a 72MHz problem.

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12-18-2004 04:20 PM  13 years agoPost 14
elektromodely

rrNovice

Kosice, Slovak Republic

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right - 9XII has some added functionality which brings this radio to the 9303 level, but it is almost in heli (cyclic to throtle mixes, governor etc.). It's price is done - starting 89000 JPY (japan yen) up to 102000 JPY. It will be available in Jan 2005 and combos are with digi servos only (DS8301 or DS8321) and R900S (the same as previou version).

I hope there will be new version of 10X too (maybe next year?)

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12-18-2004 05:52 PM  13 years agoPost 15
9387ASH

rrElite Veteran

UK

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Heli & Glider are the areas that have been improved. The Aero section has hardly changed from the 9X.

The projected cost for the 9XII in the UK is...

JRC9X2 Combo GBP 569.95 RRP

( According to the MacG's website ) which if memory serves me well is less than the RRP of the 9X Combo !!!

Not sure when they are due in but would imagine sometime Q1 2005.

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12-18-2004 10:30 PM  13 years agoPost 16
bowies12

rrApprentice

Surrey - UK

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Macman,

Is the 9XII different to the 9303. If so what are the differences?

Regards Steve

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12-18-2004 10:36 PM  13 years agoPost 17
9387ASH

rrElite Veteran

UK

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Steve,

In all honesty from what I have seen they are fundamentally one and the same.

The 9303 uses the classic 3+1 DT thus making it only available in the stick mode you order. ( It can be mode changed but thats about 40 minutes work at the workshop ). The 9XII will be the 4DT version and therefore fully user stick mode changeable.

The 9303 does not hace ZPCM as a modulation option whereas the 9XII does ( well at least the advance pre-release version I have has it ! )

Switch layout is as the 9X, slight change in the labelling ( 9XII instead of 9X )

The rest I shall have to verify. But am certain everything else is as the 9303.

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12-19-2004 09:07 AM  13 years agoPost 18
elektromodely

rrNovice

Kosice, Slovak Republic

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ZPCM is one bit shorter than SPCM (9 instead of 10, 512 vs 1024 steps). Will be cheaper ZPCM receivers available ?

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12-19-2004 10:26 AM  13 years agoPost 19
9387ASH

rrElite Veteran

UK

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JR have ceased to manufacture the ZPCM receivers. So once the current levels go, then there are no more.

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12-21-2004 08:43 AM  13 years agoPost 20
kima

rrApprentice

Wellington, New Zealand

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If someone has used these two radios please can you tell us what the differences between the 9X and the 9XII?

I am just trying to decide if it will be worth the wait for the 9XII availability


Cheers KImberley Attwell

K R Attwell
www.PhotoHigher.co.nz

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