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HelicopterRadio - Servo - Gyro - Gov - Batt › FUTABA T7CP TRANSMITTER WITH JR PCM RECEIVER
03-01-2006 12:19 PM  11 years agoPost 1
samstar

Senior Heliman

UK

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Hi,

I realise the JR-Futaba compatibility questions have been asked many times, but I can't an exact anser related to my specific question.

I have a Futaba T7CP PCM transmitter. Will it work with a JR PCM receiver?
I have heard some people say they work on different shifts (+ve or -ve)but others say the two are compatible.

I also get the impression it may be different depending on whether your in UK on 35mhz or in the US.

Any answers from UK users??

Thanks for any help

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03-01-2006 01:40 PM  11 years agoPost 2
BarracudaHockey

rrMaster

Jacksonville FL

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PCM is proprietary to the manufacturer so even if you had the correct shift, for Futaba pcm to work you need a futaba reciever.

Andy
AMA 77227
http://www.jaxrc.com

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03-01-2006 01:44 PM  11 years agoPost 3
samstar

Senior Heliman

UK

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Ok cheers Andy. What's best thing to do then as I have now got a heli with full JR radio equipment but only have Futaba Transmitter. Shall I get an FM JR receiver or a Futaba reciever (presuming Futaba receiver is compatible with JR servos, gyro etc)?

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03-01-2006 01:57 PM  11 years agoPost 4
9387ASH

Elite Veteran

UK

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Question is how many channels do you need ? If its more than 7 then JR do not do a PPM receiver with more than 7 channels anymore. You may be able to pick up a 549 (9 channel)receiver second hand.

So if its more than 7, you will need to go the Futaba receiver route.

Servos are compatible so are Gyros. All they are looking for at the end of the day is a pulse of 1.5 msecs width at centre.........

(Or you could buy a new JR Transmitter !)

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03-01-2006 01:59 PM  11 years agoPost 5
nivlek

rrProfessor

Norfolk England

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A Futaba PPM or JR PPM receiver will work with your Futaba TX .

At the end of the day , it gets dark .

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03-01-2006 02:28 PM  11 years agoPost 6
samstar

Senior Heliman

UK

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Thanks guys, thought about a JR transmitter, but I like mine and can't be bothered to learn how to use a different programming setup

I need 8 channels really so will probably go for the old futaba FP-R138DF Dual Conversion. Had one of these before and never failed on me

I was thinking about moving to PCM, but it seems it has some pretty heavy disadvantages especially in a heli...don't like the sound of my radio just cutting out immediately and entering failsafe mode , maybe ok in a plane which can potentially glide down!

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03-01-2006 02:55 PM  11 years agoPost 7
nivlek

rrProfessor

Norfolk England

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The issues with PCM locking out are overstated . By the time the PCM receiver went into failsafe , the PPM receiver would have put enough false commands through to the servos to crash the model anyway . I haven't used a PPM receiver in a heli for ten years . The Futaba 138DF isn't a bad receiver , it's been around for a long time now , I sold off half a dozen of them last year , I now only own one PPM receiver .

At the end of the day , it gets dark .

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03-01-2006 03:48 PM  11 years agoPost 8
BarracudaHockey

rrMaster

Jacksonville FL

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If the interference is that bad the only difference is the servos are jittering when it crashes vice the servos are locked in place or at fail safe when it crashes.

Andy
AMA 77227
http://www.jaxrc.com

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HelicopterRadio - Servo - Gyro - Gov - Batt › FUTABA T7CP TRANSMITTER WITH JR PCM RECEIVER
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