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Sat May 09, 2009 2:09 am
Spockie-Tech Site Admin
Joined: 31 May 2004
Posts: 3160
Location: Melbourne, Australia
Most likely a remote antenna unit.
Due to their high carrier frequency 2.4Ghz radio systems have a very small wavelength, so are prone to being blocked by metal parts of model plans and things at long range when banking and turning.
By placing a second antenna in a different spot (like on each side of the model), you greatly reduce the likely hood that your engine or something will get in the way of line-of-sight between your receiver and transmitter.
So, basically it improves long range reliability. not usually required for Robot use where the machine is so close, that the Rx antenna is likely completely immersed in the near-field signal and cant be easily blocked. _________________ Great minds discuss ideas. Average minds discuss events. Small minds discuss people
Sat May 09, 2009 4:13 am
shreddy
Joined: 09 Jan 2009
Posts: 518
Location: Wantirna, Melbourne
Joined: 08 Nov 2006
Posts: 1265
Location: Adelaide
cool not worth buying our old one with such a small price difference
looks exactly like http://www.r2hobbies.com/proddetail.php?prod=rcps61206_61411 that ran what looks like the same rx anyway this one is just a bit cheaper. _________________ Remember to trust me, I am an Engineer.
This one is not the cheapest wheel radio on the block at $139 USD, but it has 4 channels, which would make it ideal for a bot like Demon with extra features
Fri Jul 17, 2009 6:27 pm
Glen Experienced Roboteer
Joined: 16 Jun 2004
Posts: 9481
Location: Where you least expect
that radio looks good. defo looking into it now apparently you can hack the 2ch one into 4ch
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