RCP57

My Feedback: (25)

Danny

Other than the amount of channels are there any real differences between the S-PCM receivers. The parts I'm looking at are:

R770
R649
R955


I moved this from another forum that I incorrectly posted this question.

dsnyder

There are internal construction differences that can make slight differences in performance, but they are all designed for the same purpose. Overall performance will be similar between them.

Pilot232

My Feedback: (3)

Danny,

Specifically, what are the "performance differences"?

Pilot

GJr.

My Feedback: (3)

There is also an R945 dual conversion pcm receiver available. On the way is a new 10 channel synthesized receiver and transmitter module.

RCP57

My Feedback: (25)

I'm not interested in the dual conversion. I know it is supposedly better, but I had my fill of dual conversion when I flew Futaba products. As far as the synthesized transmitter, I don't see how anyone in a club environment can use one. The clubs I belonged to in the past and my current club has a rule that you must insert your current AMA card in the slot in the frequency board that your flying. With the synthesized transmitter how are you going to tell what frequency your on? The new units scan the entire frequancy range then pick one and lock onto it. Am I'm missing something?

dsnyder

You tell what frequency you are on with a sythesized system based on what frequency you set the system to be on.

The difference wouldn't be anything specific, if there is any difference at all. Since they are not identical in every aspect, one may outperform the other in terms of range in some models in some areas. It is most likely however that there would be no difference at all, or only so slight that you would not tell the difference.

Mac_Man_UK

On the rear case of the new Synth Module from JR, there are 2 small rotary switches. These 2 switches set the transmit frequency that you wish to use. ie, if channel 72 is free at the board, then you set the "10's" switch to 7 and the "1's" switch to 2. Power the system up and after a small delay the system will then transmit on Ch 72. Should the switch move or be moved whislt still powered up, the frequency will NOT change until a power down reset occurs. Also, should you accidentally dial in an unauthorised channel, this is detected by the system and will not transmit anything at all.

Please note that I refer to a channel that I know exists in the UK but not sure if that is valid in the USA ! ( For the UK, channel 72 is 35.120 MHz )


[8D]

RCP57

My Feedback: (25)

Thanks for the clarification. I was under the impression the the transmitter module scanned the band and picked an open or not in use channel. The dials make sense.