Question regarding receivers

[beetleman]

Hi,

My question is basic - would a 75 AM receiver work with a 75 AM transmitter of a different make? In other words, would radio components of the same HZ and band work if they are of different makes (companies)?

Thanks

[94eg!]

They should.  As long as your not trying to mix AM & FM, FM

& PCM or AM & PCM etc, you shouldn't have any problems. 

In some cases I've heard, the crystals may need to be switched to a

single brand for both the transmitter & the reciever, but I'ver

never personally experienced this.  I've only used Futaba &

Tamiya (made by futaba) brand radio products...

[monster_beetle]

I'm personally using futaba and Graupner/JR mixed, and it works perfect. Absolutely no problem.

[beetleman]

Thank you people for your answers. I would like to ask another question if I may.

How are radio sets (for cars and boats, not planes) rated? Is 75 better than 27? I got a 75 thinking it was the best but experience control jitter/loss at 15 meters (45 feet)!

Thanks again,

Beetleman

[94eg!]

I've used both 75mhz & 27mhz AM radio systems.  I can say

that I cannot tell the difference in range or performance from either

one.  The

main difference is that 27mhz only has 6 channels to choose from (12 if

you buy special "half-step" crystals), while 75mhz has 30 different

channels.  The REAL difference in performance is when you step up

to FM, or even PCM modulation.  I don't know the technical

differences, but I can say that my Futaba FM radio has a range much

further than I can safely drive the car, and my friends old PCM goes

even further.  Those types of transmitters offer greater range, as

well

as faster response with an obvious sacrifice in affordability. 

Both FM & PCM radios operate on the same channels as AM radios

(27mhz, 75mhz, etc...), and they will still interfer with other types

of radios on or near the same channel.

My friends PCM radio

interferes with his AM radio & they are not even on the same

channel (one channel apart).  No biggie as long as you don't drive

those two cars together...

Here is a link to Futaba's frequency chart: http://futaba-rc.com/faq/frequency.htm

[monster_beetle]

I should never choose a 27mhz. Here in the netherlands is it the frequency that is used at all the toy cars, so the chance on interruption of the signal with playing children is too big.

 

[techie]

I use 40mhz most of the time, quite a large range of crystals which is good for racing.

[legarto]

I have a vintage AM Futaba magnum jr. that works and I use it with my runner. I just pulled a vintage Futaba receiver and servos out of a car I am restoring (it didn't have a controller). Can I have the magnum jr. control the second restored car if I get a crystal set? The controller is 75.990 with the receiver 75mhz and 90. The new receiver is 72.790 and 50. Thanks for the help!

Take care.

[94eg!]

72mhz (channels 11-60) & 75mhz (channels 61-90) radio components are not compatible with each other.  You will need to get a receiver that is on the 75mhz band to work with your 75mhz transmitter.

[legarto]

Thanks for the 75 vs. 72 clarification. I have another 75.750 #78 receiver, this should work then? I would need to get a set 75mhz of crystals?

[legarto]

And a follow-up: I have a vintage AM Futaba FP-T2GS 2 stick with a 75.750mhz (78) sticker on it. I don't see a crystal anywhere on the exterior or interior. Can this radio not use alternate crystals?

[legarto]

bump  - still wondering about the radio (is it set to one channel only and thus you can't change crystals)?

[aconsola]

Having never owned one myself this is just a guess from looking at a picture of one on ebay.

On the front lower right is a portion of the label that lists the frequency which appears to be separate from the rest of the face. I would bet that the crystal is under there.

Is it possible to use something thin to pry that section up to look?

-Anthony

[legarto]

thanks for the reply - I am looking there and it is just a sticker - I'll snap a pic of the insides and maybe someone will spot it.

[legarto]

I figured it out. I checked the manual online and it is missing the crystal. I'll need to get a set.

Thanks!