Radio/Receiver Question

[yoraish]

Hi,
I'm planing on building a new truck, but I need some help with the electronics.
Right now, I'm controlling a 2 channel receive with a basic 2 channel radio transmitter. But in my new project I want to integrate a 2 speeds gearbox, that change will need a (at least) 3 channel receiver and radio.

I own an E-Sky 4 channel transmitter, but not a receiver. Can you please suggest me a good receiver to work with the E-Sky transmitter?

P.s. Do receivers come with crystals?

Thanks!
yoraish

[yoraish]

Well, in addition to my last post, the E-Sky transmitter is a 72MHz unit, will it be good to run a truck?

[Charlie-III]

No reason you couldn't use a 72mhz radio, just make sure you keep the RX away from the ESC & motor to limit interference.

RX's usually DON'T come with crystals, you have to buy them seperate. Some radios require that you run a RX from the same company as the TX, you may not be able to run a HiTec RX with a E-sky TX.

[yoraish]

That makes sense, thanks a lot!!

[Trubble]

Originally Posted by yoraish

Well, in addition to my last post, the E-Sky transmitter is a 72MHz unit, will it be good to run a truck?

No.

Well, if you don't fear the FCC, and have no regard for any model airplane fliers in the area, then go for it.

27 & 75 mHz are frequencies approved for ground use only. (cars, trucks, boats, tanks, battlebots, etc)

72 mHz is approved for air use only. (planes, helicopters, gliders, dirigibles, etc.)

EDIT: My bad, the above info is for U.S. regs. just checked your location and where you are, they might not have such laws, I don't know.

But mechanically, it'll work.


Been a long time since I bought a receiver on those frequencies, but iirc they didn't come with crystals. I usually reused old ones, or just bought a new set if I was adding a vehicle to the fleet.

[yoraish]

That's very interesting! I never thought about such thing.
There is just one thing I don't fully understand:
Is a 72MHz transmitter "weaker" than a 2.4 GHz transmitter?
Or the frequencies are there for another reason?

[jkracing37]

Here is an interesting discussion of 72 vs 2.4:

Better range? 2.4 GHz vs. 72 MHz? - RC Groups

[Charlie-III]

Originally Posted by yoraish

That's very interesting! I never thought about such thing.
There is just one thing I don't fully understand:
Is a 72MHz transmitter "weaker" than a 2.4 GHz transmitter?
Or the frequencies are there for another reason?

The biggest reason I went to 2.4ghz was to stop having freq conflicts at races. The 2.4ghz (in general) tend to stay stuck with the RX they are bound to.
Other benefits are that 2.4ghz tends to allow multiple "models" on a single TX. You turn on the TX, pick the rig you want to run, turn on the rig & off you go.

With AM or FM, you usually needed to tweak settings when running a different rig off the same TX. Close, but not perfect.

For the money, a hacked GT3B or GT3C from LosiKid/OverkillRC is a way to go. It's 2.4ghz, hacked complete with a RX is less than $100, additional RX's are $10 or less.

[yoraish]

Originally Posted by jkracing37

Here is an interesting discussion of 72 vs 2.4:

Better range? 2.4 GHz vs. 72 MHz? - RC Groups

That thread was very informative, a great source, thanks!

Originally Posted by Charlie-III

The biggest reason I went to 2.4ghz was to stop having freq conflicts at races. The 2.4ghz (in general) tend to stay stuck with the RX they are bound to.
Other benefits are that 2.4ghz tends to allow multiple "models" on a single TX. You turn on the TX, pick the rig you want to run, turn on the rig & off you go.

Now that's what I was looking for, I think I'll go with something like XR4 4-Channel 2.4Ghz Transmitter/Receiver Radio .

Thanks everyone