c_makhija

Hi Dave,

In the 28X are 2 batteries used as a redundant system?

Thanks
Chatty.

jcterrettaz

My Feedback: (1)

from what I read is to fly all week the radio come with one pack only

Dave Wilshere

Not really, but with two in, if one fails that it will keep working on the other. You can set it to use both together or one after an other.
For me its a weekends flying with no charging needed! 6400mAh :-)

Std DMSS radios are very good on battery, but with all the bling and lit screen this will use more!

Dave

drac1

My Feedback: (4)

Hi Dave,

What's the difference between the 712 and 731 receiver?

Scott

Airman98

My Feedback: (9)

The 712 has a port to plug in a extra antenna giving you four ant. The 712 has path diversity so no need for a third ant for telemetry. It also has 28 channel capability while according to manual the 731 is limited to 17 channels. Im using a 712 on my jet with a 36in lead going to the remote ant at the rear of my jet.

Airman98

My Feedback: (9)

Just thought I would show how the gear app works. The first graph is my gear going up and down. Second graph is for the main doors, they open then close after the gear goes up. And when the gear goes down they close back up. The third graph is for the nose gear door, it simply closes and opens. The trick to getting it all to work is you first have to go into channel assign and assign ch 6 and 7 to s-gear ch1 and ch2. This adds the 2 extra graphs.

Dave Wilshere

Scott

What he said. You don't need a remote to get telemetry with the 712, but can add either TL or Diversity remotes if you wish.
For Powerbox SRS units, the 712 is our first choice

Dave

Dave Wilshere

Scott

What he said. You don't need a remote to get telemetry with the 712, but can add either TL or Diversity remotes if you wish.
For Powerbox SRS units, the 712 is our first choice

Dave

Dave Wilshere

double post!

drac1

My Feedback: (4)

Thanks Dave and Airman.

ticketec

My Feedback: (2)

Hi Dave,

What is the advantage of the 712 over the RG031BX infinity receiver? I'm setting up an powerbox SRS in my Hawk and am just about to buy R/x's

Thanks

dave

drac1

My Feedback: (4)

I read on another thread that the 712 uses less power and doesn't get as hot as the 731.

Dave Wilshere

Main one is pure cost. But installation neatness.
For me the 031BX is for installations where you will struggle to get the two close proximity aerials (to Rx';s) in clear space (away from carbon or metal) (on a 712)

Dave

Airman98

My Feedback: (9)

To me the advantage of the 712 would be that you have 7 pwm ports available possibly saving you 80 on harness. Then for 40 you can add the dual ant remote that you can place up to 36 in away from 712. Also the 712 has full 28 channel capability. As Dave said about the only thing the infinity has going for it is neatness, but you do have a telemetry ant to deal with.

drac1

My Feedback: (4)

This may seem a bit dumb, but can anyone tell me this.

I have been building a new model for a while and it is set up with JR wide voltage servos. 4 X ail, 2 X elev, 1 X rudd, 1 X throttle and 1 X ignition = 9 channels required. As far as I know, these are not Xbus compatible and i don't want to have to buy more servos.

So is there a way I can use my 28X utilising PWM for the 9 channels?

spike5150

Sure- just use an 11ch DMSS RX. Or use xbus pwm converters

drac1

My Feedback: (4)

Thanks spike.

i should have put a bit more thought into that. Lol. Of course I can use DMSS Rx's.

Having Xbus on my brain made me forget about DMSS.

spike5150

I hear ya. Learning a new tx plus xbus gets confusing. I think I am getting my head around it, though.

drac1

My Feedback: (4)

More dumb questions could be coming your way then. Lol.

ticketec

My Feedback: (2)

My local didn't have them so when I went looking I realised just how much cheaper they are!

having PWM ports makes no difference in an SRS installation, and nothing States that the infinity is limited in channels either, but I wonder if it's worth getting the extra antenna. Nil stock in Oz of the extra antennas at the moment

A little info to add to the previous discussions, my XG14 weighs in at 812 grams. JR don't publish this info anywhere I've been able to find.

thanks

dave

Airman98

My Feedback: (9)

This is in the 28x manual. Page 5-22

ticketec

My Feedback: (2)

Ok thanks.

what do they mean "older"???? The 031BX has been out for less than 6 months!!

thanks

dave

Airman98

My Feedback: (9)

By older I can only assume they mean ones that don't have path diversity. The 712 was the first receiver to have it eliminating the need for the telemetry ant. The 612 has just came out as well. http://www.jramericas.com/234746/JRPR03599/?pcat=474

spike5150

Did you ever conduct your tests? I still don't think this is true. I got some more xbus harnesses last week, so I can do some testing.

Jeremy

Airman98

My Feedback: (9)

No have not had the time. But its pretty clear when you read the manual. Even the new receivers have to have the resolution reduced in order to get the 28 channels so my guess is the older one just dont have the bandwidth to support more than 17 channels. When those receivers came out there was only a 14 channel radio.