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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Futaba FASST › R617FS not enough channels
08-22-2008 10:12 PM  12 years ago
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QuickSilver

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Moorestown, NJ United states

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R617FS not enough channels
I purchased this RX forgetting that Futaba uses a channel for power now I am a channel short because I need two AUX channels one for my gyro and one for my Revmax. Is it possible to use a Y connector some how power the RX so I can free up a spot and how would I go about doing this which channel would I Y off of? or does it even matter? I am using a 9ZwCII

Kyle
"What's behind you doesn't matter"- Enzo Ferrari
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08-22-2008 10:28 PM  12 years ago
captb

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Arizona Desert

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You can Y in on any servo or plug power wires in gyro sensing plug if the 2 pin holes are open like on the GY401. captbIf it's gonna happen it'll happen up there!
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08-22-2008 10:29 PM  12 years ago
derek533

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Edmond, Oklahoma

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After a quick google, I found that you would use a Y splitter on the 7th channel connecting both the battery and servo/revmax into that channel.

Here's a question asked of the Futaba reps over on the universe where they verify this.

http://www.rcuniverse.com/forum/m_6481297/tm.htm
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08-22-2008 10:32 PM  12 years ago
DougV

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Miramar, Florida - USA (Ft. Lauderdale)

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Actually you can use any channel to Y the battery.

Doug.
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08-22-2008 10:34 PM  12 years ago
derek533

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Edmond, Oklahoma

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Krysta who's a rep, seems to indicate it can only be the 7th channel.

I don't know why that would make a difference in all honesty. Unless the circuity for the lower channels wasn't designed to carry the load of the battery would be my only guess.
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08-23-2008 12:33 AM  12 years ago
QuickSilver

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Moorestown, NJ United states

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Problems
Well I think I know why it's channel 7, I hook up all my channels except for aileron (channel 1) and I pluged the battery into it I then hooked up all other channels as normal with channel 7 (aux 2)being my aux for the revmax. Now for some reason my revmax would not come on but when I pluged my revmax aux channel into the aux 1 which controls heading hold and non-heading hold it came on and worked fine. I am not sure why this is. THe RX did not come with any instructions as to where to plug the battery into. It's as if there is no power going to channel 7 as I am unable to control the revmax. Now this may change once I put the Y connector on because then there will be power for sure going to channel 7.

Kyle
"What's behind you doesn't matter"- Enzo Ferrari
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08-23-2008 04:37 AM  12 years ago
Mr502go

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Kennesaw, GA

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I'm using that same receiver w/throttle jockey pro. . I just plugged my power into the aux on the TJ. . . works fine.
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08-23-2008 05:48 AM  12 years ago
QuickSilver

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Moorestown, NJ United states

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RX
Ok if you plugged the power in to the AUX of your TJ Pro how are you now going to adjust your head speed the AUX needs to be plugged into the AUX 2 channel of the RX to get the head speed setting. Please explain
"What's behind you doesn't matter"- Enzo Ferrari
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08-23-2008 12:30 PM  12 years ago
Parrich_

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Spain - Mallorca

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You cant take the red and black wires out from revmax gain chanel and just leave the signal cable..

The revmax will still get power from the trothel channel..

To power the reciever just plug the battery cables and gain cable coming from revmax to channel 7 on the reciever

Hope this makes sense

Good luck
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08-23-2008 12:34 PM  12 years ago
Parrich_

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Spain - Mallorca

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A picture i had laying around, its spanish but i think its easy to uinderstand..

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08-23-2008 06:01 PM  12 years ago
Mr502go

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Kennesaw, GA

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I apologize guys, I used the wrong terminology, I actually plugged it into the ACC part of the unit. It was one of the unused plugs on the TJ. It's worked fine. I used the words "aux" by mistake.
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08-24-2008 01:29 AM  12 years ago
QuickSilver

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Moorestown, NJ United states

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Y connector
Ok I got it to work, I just used a Y connector and connected the power to one pigtail and from the AUX of the revmax to the other end of the pigtail then plugged into channel 7. I cut 2 out of the 3 wires so as not to send power into the revmax so it would only get the signal from aux channel.

FYI if you are doing this and you are going from an 8 channel RX down to this R617FS 7 channel RX and using the Y connector method, you need to switch your channel assignment from AUX 2 on channel 8 back to AUX 1 which is on channel 7 otherwise your GOV will not come on

Kyle
"What's behind you doesn't matter"- Enzo Ferrari
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08-25-2008 02:19 AM  12 years ago
smallplanes

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S.C. ,SSA

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My 7ch works great just like it is with no y.I use a fromeco reg and bat and i use the 611 gyro.
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08-29-2008 02:42 PM  12 years ago
iskoos

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Orlando, FL

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Well I have no explanation as to why Futaba recommended it to be Y'ed into channel 7. It should work in any channel without a problem.
I personally use the Y harness on channel that's marked as battery but I don't see why it would not work on any other channels.

Quicksilver and Mr502go,

If I understood you correctly, the method you guys use will work just fine but if for some reason your revmax unit has any problem during the flight and cannot pass the power to the Rx, then your whole Rx unit will shut down!.. And you know what this means. Right???
I would not take this risk to be honest. I would just Y the power into channel 7 and be safe.
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08-29-2008 07:01 PM  12 years ago
QuickSilver

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Moorestown, NJ United states

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617
That is what I did, I am not powering my Rx through the Revmax for that reason alone. I just Y'ed into channel 7 w/one lead to the Rx and one to the Revmax I then cut the neg and pos lead going to the revmax so it only gets the AUX 1 signal from channel 7 on the radio and is not sending power to it as well.

Kyle
"What's behind you doesn't matter"- Enzo Ferrari
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08-30-2008 04:16 AM  12 years ago
Sparkhead

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Melbourne Australia

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If you can only use channel 7 what happens when you use an ESC with an inbuild BEC??? If you shine a torch on the back of the Rx you will see that all of the positives and negatives are joined together. You can pump your power into any channel.
Mick.

Robbe & Futaba.
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09-14-2008 11:06 AM  12 years ago
UpInTheAir

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Ohio

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I thought that in all receivers the Pos and Neg terminals were a buss and that the only seperate ones are the signal terminals.
How can there be a different set of power connections on any sepecific channel?
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09-14-2008 12:03 PM  12 years ago
JetFire

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The Golden STATE

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There are allot of things that Futaba don't recommend. At least, thats the case with me everytime I ask them a question. Technically however, 'don't recommend' doesn't emply that its not possible. I believe that customer service is programmed to say that for liability purposes IMO. Having said that, I get my power on my 7C by unplugging the leads on my battery and combined it with the available slots on the remote lead on my 401 without problems. With this setup, I basically utilized channel-5 for power. My GV-1 on Aux.
Trex700N Pro
DX8-2.4
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-The ONLY way you fail is when you quit.-
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09-15-2008 02:02 PM  12 years ago
tchavei

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Portugal

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Come on, do a search on RR. There are a few post involving that person and those threads always end up making futaba look bad.

It doesn't matter what channel you use to power up the rx. In fact I'm using two channels on my 6014 (double feed) without any problems.

Tony

--------------------
"Perfection and patience usually walk side by side..."
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09-15-2008 02:17 PM  12 years ago
krysta

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Champaign IL

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derek533,

Per the link that you give, I answered as I did only because that specific customer did not mention using a different channel. If you check the receiver you will note that the 7th channel slot is marked 7/B. This is would be the "normal" place to Y the 7th servo and battery..

But if you will check the FAQ I wrote on our Futaba website, you will also see where I state that you can plug the battery into any slot you like on Futaba receivers.

http://www.futaba-rc.com/faq/product-faq.html#q220

Sincerely,
Krysta
Product Development & Support Specialist
Futaba Service Center USA
service@futaba-rc.com
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HomeRC & Power✈️Aircraft🚁HelicopterRadio - Futaba FASST › R617FS not enough channels
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