I know I am running old technology but I have a quick question. I have the NexSTAR with the 4 channel rx that came with it. I would like to add the flaps on the wings so I need a new receiver. I have a Futaba Super 8 (8UAPS) radio. Its a 8 channel PCM/FM radio system. It has the module where I can set it to any of several frequencies in the 75mHz band. If I buy a new 8 channel receiver, would I be better getting a PCM receiver as opposed to the FM receiver I have now? If I do, will my standard servos that came with the NexSTAR work with PCM?

I bought the tx from a friend at work and it did not come with the receiver...that's why I don't have the 8 channel receiver that would normally come with the tx.

Thanks,

-Alvin

75mhz isn't that a ground radio?

Uh...yes. That was supposed to be 72mHz!

On a trainer it won't make much difference. The pcm is a little more up to date so why not get it.

The 8U Super TX will operate both FM and PCM receivers. A servo will work with either receiver.

PCM rx design features improved reception over FM and a Failsafe feature.

I use PCM on larger, more powerful and Helicopter models with safety regards to others, and for piece of mind. (Actually a must on Heli's for Failsafe)

However I have, and still do, use FM with absolutely NO problems whatsoever! (Knock on Wood).

Pay vigil attention to Tx and Rx battery condition and your radio installation overall.

Remember to re-check balance/CG after your flap installation. Good Luck!

Thanks. I was just thinking that since I need to buy a new receiver anyhow, maybe I would be better off with the PCM. Even if it's not necessarily that much better. Thanks for all the replies.

Alvin,

I agree with the previous posters.

Here you can find more answers to your questions:

http://www.futaba-rc.com/faq/index.html

Used 72 MHz radio equipment can be found in our RCU Buy and Sell.
A FM 8 channel including crystal can be found for $30 there.
High or low band need to be considered, if you are switching crystals in most receivers (switching crystals in a transmitter is a no-no).

http://www.rcuniverse.com/market/category.cfm?catID=122

FM is good enough and PCM has higher resistance against interference.

With so many fliers using 2.7 GHz, interference for 72's users is almost null.

Now, for the Aerodynamics of your question:
Trainers have wings with enough lift capacity as for not needing flaps for landings and take-off's.

This article about RC flying with flaps is interesting:

http://www.modelairplanenews.com/Med...ager/flaps.pdf