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[Plastic - RIP]

Internal antenna are generally mounted at the top of the transmitter , many in the handle, and the main signal goes forwards. Your hands shouldn't be near the antenna. The actual transmitted signal will be the same as when the antenna is external, your hands will be roughly a similar distance from the actual aerial wire.
Jim

Are you familiar with EIRP?      The energy density is strongest at the antenna and then spreads out into the radiated pattern.       Your fingers are a nice matching load so will absorb a good chunk of the power being generated right at the antenna.

[unbuiltnautilus]

Hopefully the designers of our radio control equipment are aware of it, also they should be aware of fingers ..

[phillnjack3]

TSENECAL
Do you know what make the reciversare with teh long aerials. and are these 2.4 or 35meg ?
a lot of planes using 35 meg do have long antenna, but not seeing any long stuff on the new 2.4
 

[Steve Dean]

There are many 2.4ghz receivers available with what look like long antennas. As explained above, the bulk of the wire is screened cable and just the short bit at the end is acting as the antenna. This can be very useful in a model boat, as it enables the important bit to be positioned as high up as the model allows. Some receivers have 2 antennas of this type, which is even better as then you can position the antennas with different orientations, i.e. one vertical and other at an angle or even horizontal. You will see receivers described as having 'Diversity' reception .... this is a technique whereby the RX uses the best signal from either of the antennas.All of this is very common in model aircraft and in large models they will often use multiple 'satellite' receivers to ensure continuity of reception as the aircraft changes position in the sky.I use these techniques in most of my model boats, (including large very high speed boats) and never have any radio problems, even at extended range.

[C-3PO]

Long antenna leads in picture are part of receiver made by "Jeti" @approx £190

https://www.jetiuk.co.uk/

It appears that only the last part is the actual antenna part responsible for receiving the signal from the transmitter

The rest is just a feeder "coaxial cable" allowing you to mount the "active" part of the antenna a fair distance from the receiver - I have one similar with long leads but cannot remember which model it's in :)




C-3PO
_._

[phillnjack3]

for £190 for a reciver i would want it to come with a full size boat.
 that is stupid price....

[JimG]

This is for a specialised radio set commonly used in high end aircraft. The receiver cost is not that much when you consider the set will cost around £1500. This gives you 16 channels with sophisticated programming and full telemetry with suitable sensors. There is an upgrade available for voice activated controls, a second frequency for redundancy and several others. When you are flying a large model over 20Kg weight or a large jet capable of over 200 mph then complete reliability is wanted and pilots will pay for this. These models will have 2 receivers on board allowing for control to be kept if one fails or loses the signal.
All radio manufacturers produce 2.4 GHz receivers with extended aerials, many at suitable low prices. The FlySky ia6 6channel is available at £15.
Jim

[phillnjack3]

so the flysky reciever you mention might be better for boats then ?
especially at longer distances ?

[tsenecal]

phillnjack3

https://www.spektrumrc.com/Products/Default.aspx?ProdId=SPMAR6255

frsky sells replacement antennas for any of their receivers that use the ipex connector

https://alofthobbies.com/frsky-250mm-dipole-antenna-24ghz-ipex1.html

[Stan]

This thread has now taken up over 2 pages going over the same thing. I have take some information from the Spectrum web site regards the operating range of there transmitters. The range from air use to surface use is dramatically different.

 Air system - In a perfect environment and setup, Air transmitters will get up to 2km. There are many factors, either on model setup or in the environment, that will reduce the maximum range. Our rule of thumb is line of sight, if you can see your model, you should have control. Please see your receiver’s manual for tips on installation for best reception.
 
Surface system - In a perfect environment and setup, Surface transmitters will get up to 450 meters. There are many factors, either on model setup or in the environment, that will reduce the maximum range. A major factor to consider with Surface models is to consider the ground plane when positioning your antenna. Please see your receiver's manual for tips on installation for best reception.
 

[Martin (Admin)]

for £190 for a receiver i would want it to come with a full size boat.
 that is stupid price....

That Jeti radio is real high end stuff, really high end!

If you invested a lot of time, effort & money into a model and you want a lot of reassurances .... and money is no object
 ( or you're sponsored! ) you look at everything that's available in the market place, 'you pays your money and makes your choice!'

This guy uses Jeti .... and look what he builds! - https://youtu.be/tLc7Us5lYuw   
 

 
 

[Stan]

Further to my last post I have checked the spec for the Flysky 6 channel 2.4  it shows the line of site range up to 1km

[tsenecal]

The FlySky 6 is considered an aircraft radio, so it gets half the range of the Spektrum aircraft radios....

[Martin (Admin)]

I thought 'aircraft' radio had longer range than 'surface' radios?

 ... are 'park flyer' radio still a thing.....?
 
 

[tsenecal]

I thought 'aircraft' radio had longer range than 'surface' radios?

 ... are 'park flyer' radio still a thing.....?
 
 

i simply wished to make sure that everyone realized that a FlySky 6's stated 1km of range was probably based on aircraft testing, which would indicate it would only reach around 225m if used in a surface vessel...  i guess i should have been more direct in my statement.

[Plastic - RIP]

This guy uses Jeti .... and look what he builds! - https://youtu.be/tLc7Us5lYuw   

I've been following this guy for ages - have you seen what happens to his models?    I'll stick with boats.

[john44]

This guy uses Jeti .... and look what he builds! - https://youtu.be/tLc7Us5lYuw   
I've been following this guy for ages - have you seen what happens to his models?    I'll stick with boats.

Wow he must be a millionaire or not married with no kids doesn’t drink or smoke and still lives with mum and dad

John

 

[C-3PO]

Jeti radio kit is certainly nice stuff - I got these a few years back - part of a deal of the century....





C-3PO