prof.hell

Folks,

Apologies from the onset if this is a FAQ, but what little I have by way of manuals, is not making things clear enough, so hoping for some sage advice.

I bought a FUTABA T8UP PCM 1024 radio set from fleebay, and that came with an 8 channel R138DF dual conversion receiver. My questions:

1. How do I connect a battery pack to it? In the list of servo connections, I have one marked 8/B, which I presume is channel 8 and a battery connection. Given that all other sockets look the same, how do I wire in the battery pack, with and without an 8th servo? is there a special Y cable? and if so, can someone guide me with a part number or a search term?
2. What's the maximum voltage that the receiver can work with? if I can slap a 6 volt battery pack, then that would make my life easier when using a LiPo pack instead of the NiMh/NiCad packs, with the obvious bonuses of the LiPo packs.

Thanks in advance.

BarracudaHockey

My Feedback: (11)

The positive and negative are on a bus. You can plug the battery into any channel. If you have all 8 occupied with servos then a standard y-harness to a servo. In general if you go that route best practice is to plug it in with something non-critical like nose wheel steering.

The receiver doesn't care what battery type you use, its down to what your servos will handle, if the servos are rated for 7.4v or marked HV you can use a 2S lipo. 6v rated servos can run A123/Life packs or 5 cell Nicad/Nimh packs.

prof.hell

Much obliged sir !

So which of the three pins are +ve/-ve ?

Thanks again.

BarracudaHockey

My Feedback: (11)

It should be marked, usually the ground is at the bottom, middle is hot and top is signal. The white or lightest color wire on the extensions are signal and the dark brown or black is ground.

Futaba receivers and servos and extensions are keyed, generic will fit though and if the polarity is wrong it just won't work.